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Kernel Live Patch Security Notice LSN-0077-1
Posted May 18, 2021
Authored by Benjamin M. Romer

Vincent Dehors discovered that the shiftfs file system in the Ubuntu Linux kernel did not properly handle faults in copy_from_user() when passing through ioctls to an underlying file system. A local attacker could use this to cause a denial of service (memory exhaustion) or execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-3492
SHA-256 | bdea505eb4fcf592e368d096a5525e292ae2730578fbf547edea57ce828b48fd

Related Files

Kernel Live Patch Security Notice LSN-0106-1
Posted Aug 20, 2024
Authored by Benjamin M. Romer

In the Linux kernel, vulnerabilities in netfilter, tls, and tty have been resolved.

tags | advisory, kernel, vulnerability
systems | linux
advisories | CVE-2023-52620, CVE-2024-26585, CVE-2024-36016
SHA-256 | 26f9dfe489d13089790305d8f67825c601335c35926cd154fac7a9ac2ed36d53
Kernel Live Patch Security Notice LSN-0105-1
Posted Jul 17, 2024
Authored by Benjamin M. Romer

It was discovered that the ATA over Ethernet (AoE) driver in the Linux kernel contained a race condition, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the netfilter connection tracker for netlink in the Linux kernel did not properly perform reference counting in some error conditions. A local attacker could possibly use this to cause a denial of service (memory exhaustion). Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2023-6270, CVE-2023-7192, CVE-2024-26642, CVE-2024-26828, CVE-2024-26924
SHA-256 | e841c7c43cd27027fc1462482840cc26556602ee6c248d45547e0f6361010c71
Kernel Live Patch Security Notice LSN-0104-1
Posted Jun 11, 2024
Authored by Benjamin M. Romer

It was discovered that the ATA over Ethernet (AoE) driver in the Linux kernel contained a race condition, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that a race condition existed in the AppleTalk networking subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2023-51781, CVE-2023-6270, CVE-2024-26581, CVE-2024-26597
SHA-256 | f7127619d6d49ee0879a07ecb39ec1664f889e77759d10e791546b357aa50eb4
Kernel Live Patch Security Notice LSN-0103-1
Posted May 1, 2024
Authored by Benjamin M. Romer

Lonial Con discovered that the netfilter subsystem in the Linux kernel contained a memory leak when handling certain element flush operations. A local attacker could use this to expose sensitive information (kernel memory). Xingyuan Mo discovered that the netfilter subsystem in the Linux kernel did not properly handle inactive elements in its PIPAPO data structure, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, memory leak
systems | linux
advisories | CVE-2023-4569, CVE-2023-51781, CVE-2023-6817, CVE-2024-0193, CVE-2024-1085, CVE-2024-1086, CVE-2024-26597
SHA-256 | 9e5eb976874c7a13fcf2a71119849f5abece485528a92084501d9c7e0d3b4529
Kernel Live Patch Security Notice LSN-0102-1
Posted Apr 9, 2024
Authored by Benjamin M. Romer

It was discovered that a race condition existed in the io_uring subsystem in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Lonial Con discovered that the netfilter subsystem in the Linux kernel contained a memory leak when handling certain element flush operations. A local attacker could use this to expose sensitive information (kernel memory). Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, memory leak
systems | linux
advisories | CVE-2023-1872, CVE-2023-4569, CVE-2023-51781, CVE-2023-6176, CVE-2024-0646, CVE-2024-1086
SHA-256 | 5d360530cd59a1d5483a776654fdfec33b0978f21c0af5d79f7f2f3fb4c9a39c
Kernel Live Patch Security Notice LSN-0101-1
Posted Mar 7, 2024
Authored by Benjamin M. Romer

Xingyuan Mo discovered that the netfilter subsystem in the Linux kernel did not properly handle inactive elements in its PIPAPO data structure, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that the IGMP protocol implementation in the Linux kernel contained a race condition, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, protocol
systems | linux
advisories | CVE-2023-6817, CVE-2023-6932, CVE-2023-7192, CVE-2024-0193, CVE-2024-0646
SHA-256 | bc88723b94872c87e1cb00b2d83a704f36fe21c1a1c29ddd39f56580a64d63b7
Kernel Live Patch Security Notice LSN-0100-1
Posted Feb 8, 2024
Authored by Benjamin M. Romer

It was discovered that the SMB network file sharing protocol implementation in the Linux kernel did not properly handle certain error conditions, leading to a use-after-free vulnerability. Lin Ma discovered that the netfilter subsystem in the Linux kernel did not properly validate network family support while creating a new netfilter table. Various other issues were discovered and addressed.

tags | advisory, kernel, protocol
systems | linux
advisories | CVE-2023-5345, CVE-2023-6040, CVE-2023-6176, CVE-2023-6817, CVE-2023-6932
SHA-256 | 55bac94f220995e2504245406daa6739d0a8e896be555aa348a44bc0e7cc793a
Kernel Live Patch Security Notice LSN-0099-1
Posted Nov 29, 2023
Authored by Benjamin M. Romer

It was discovered that the Xen netback driver in the Linux kernel did not properly handle packets structured in certain ways. An attacker in a guest VM could possibly use this to cause a denial of service (host NIC availability). It was discovered that the virtual terminal driver in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). Various other issues were discovered and addressed.

tags | advisory, denial of service, kernel, local
systems | linux
advisories | CVE-2022-3643, CVE-2023-31436, CVE-2023-34319, CVE-2023-3567, CVE-2023-3609, CVE-2023-3776, CVE-2023-3777, CVE-2023-3995, CVE-2023-4004, CVE-2023-40283, CVE-2023-42752, CVE-2023-42753, CVE-2023-4622, CVE-2023-4623
SHA-256 | ee52836c711111ecd52b6c4162409caa5a393b4ec4571f1e5de8d4ace83228b9
Kernel Live Patch Security Notice LSN-0098-1
Posted Oct 11, 2023
Authored by Benjamin M. Romer

It was discovered that the IP-VLAN network driver for the Linux kernel did not properly initialize memory in some situations, leading to an out-of- bounds write vulnerability. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that the virtual terminal driver in the Linux kernel contained a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2023-21400, CVE-2023-3090, CVE-2023-3567, CVE-2023-3609, CVE-2023-3776, CVE-2023-3777, CVE-2023-3995, CVE-2023-4004, CVE-2023-40283, CVE-2023-4128
SHA-256 | cee33fcedd3c531f91ff1d0a8fe1060cf9d74dad35ef33c6828c5de7d753e527
Kernel Live Patch Security Notice LSN-0097-1
Posted Sep 11, 2023
Authored by Benjamin M. Romer

It was discovered that the IP-VLAN network driver for the Linux kernel did not properly initialize memory in some situations, leading to an out-of- bounds write vulnerability. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Querijn Voet discovered that a race condition existed in the io_uring subsystem in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other vulnerabilities were also discovered and addressed.

tags | advisory, denial of service, arbitrary, kernel, local, vulnerability
systems | linux
advisories | CVE-2023-3090, CVE-2023-31248, CVE-2023-32629, CVE-2023-3389, CVE-2023-3390, CVE-2023-35001, CVE-2023-35788
SHA-256 | ea3847865d59a38e67f8587f61b9187dd08496a2ad7eb51fab178dfdf50df391
Kernel Live Patch Security Notice LSN-0096-1
Posted Jul 26, 2023
Authored by Benjamin M. Romer

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux kernel did not properly perform data buffer size validation in some situations. A physically proximate attacker could use this to craft a malicious USB device that when inserted, could cause a denial of service (system crash) or possibly expose sensitive information. Reima Ishii discovered that the nested KVM implementation for Intel x86 processors in the Linux kernel did not properly validate control registers in certain situations. An attacker in a guest VM could use this to cause a denial of service (guest crash). Various other issues were also addressed.

tags | advisory, denial of service, x86, kernel
systems | linux
advisories | CVE-2023-1380, CVE-2023-30456, CVE-2023-31248, CVE-2023-31436, CVE-2023-35001
SHA-256 | f71c9e71db4bb6c2c048a5f92cbb08cec9d660d843f677df4000f97384e9be37
Kernel Live Patch Security Notice LSN-0095-1
Posted Jun 22, 2023
Authored by Benjamin M. Romer

It was discovered that the OverlayFS implementation in the Linux kernel did not properly handle copy up operation in some conditions. A local attacker could possibly use this to gain elevated privileges. It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux kernel did not properly perform data buffer size validation in some situations. A physically proximate attacker could use this to craft a malicious USB device that when inserted, could cause a denial of service (system crash) or possibly expose sensitive information. It was discovered that a race condition existed in the io_uring subsystem in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2023-0386, CVE-2023-1380, CVE-2023-1872, CVE-2023-2612, CVE-2023-31436, CVE-2023-32233
SHA-256 | 9af3c677c764aab7902d47c2a505555b84fde68a690ae6e7624c01659fe90f86
Kernel Live Patch Security Notice LSN-0093-1
Posted Mar 30, 2023
Authored by Benjamin M. Romer

Davide Ornaghi discovered that the netfilter subsystem in the Linux kernel did not properly handle VLAN headers in some situations. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that the Upper Level Protocol (ULP) subsystem in the Linux kernel did not properly handle sockets entering the LISTEN state in certain protocols, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local, protocol
systems | linux
advisories | CVE-2023-0179, CVE-2023-0461
SHA-256 | 9ca065d34d62ef1d0df4e30ce9203dc0a6cfef9ecac0deae5d2d89eba1965f1d
Kernel Live Patch Security Notice LSN-0092-1
Posted Mar 8, 2023
Authored by Benjamin M. Romer

Kyle Zeng discovered that the sysctl implementation in the Linux kernel contained a stack-based buffer overflow. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. Tamás Koczka discovered that the Bluetooth L2CAP handshake implementation in the Linux kernel contained multiple use-after-free vulnerabilities. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that the NFSD implementation in the Linux kernel did not properly handle some RPC messages, leading to a buffer overflow. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

tags | advisory, remote, denial of service, overflow, arbitrary, kernel, local, vulnerability
systems | linux
advisories | CVE-2022-42896, CVE-2022-4378, CVE-2022-43945
SHA-256 | 6b28bba2254cc748657eeaf93b80b78ba2924b150021da014dcefa9c80762053
Kernel Live Patch Security Notice LSN-0091-1
Posted Feb 15, 2023
Authored by Benjamin M. Romer

It was discovered that a race condition existed in the memory address space accounting implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Sonke Huster discovered that a use-after-free vulnerability existed in the WiFi driver stack in the Linux kernel. A physically proximate attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2022-41222, CVE-2022-42719
SHA-256 | a0d81d94905e121dcfc30d932d20767e962d7e2b238090a1a35620768e76e04a
Kernel Live Patch Security Notice LSN-0090-1
Posted Nov 21, 2022
Authored by Benjamin M. Romer

David Bouman discovered that the netfilter subsystem in the Linux kernel did not properly validate passed user register indices. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. David Bouman and Billy Jheng Bing Jhong discovered that a race condition existed in the io_uring subsystem in the Linux kernel, leading to a use- after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2022-1015, CVE-2022-2602, CVE-2022-41674, CVE-2022-42720, CVE-2022-42721, CVE-2022-42722
SHA-256 | c8b54fe7071577436d5dc780fd7a8a538a0ac9493dd4e3362ddd475aa5896c8c
Kernel Live Patch Security Notice LSN-0089-1
Posted Aug 30, 2022
Authored by Benjamin M. Romer

Aaron Adams discovered that the netfilter subsystem in the Linux kernel did not properly handle the removal of stateful expressions in some situations, leading to a use-after-free vulnerability. Ziming Zhang discovered that the netfilter subsystem in the Linux kernel did not properly validate sets with multiple ranged fields. It was discovered that the implementation of POSIX timers in the Linux kernel did not properly clean up timers in some situations. Various other vulnerabilities were also discovered.

tags | advisory, kernel, vulnerability
systems | linux, osx
advisories | CVE-2022-1966, CVE-2022-1972, CVE-2022-21499, CVE-2022-2585, CVE-2022-2586, CVE-2022-2588, CVE-2022-29581, CVE-2022-34918
SHA-256 | 05867268c3cb4a38f1e83386efef57668577cf6a6daf5f223e85f17b2010f8e2
Kernel Live Patch Security Notice LSN-0087-1
Posted Jun 20, 2022
Authored by Benjamin M. Romer

Aaron Adams discovered that the netfilter subsystem in the Linux kernel did not properly handle the removal of stateful expressions in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. Ziming Zhang discovered that the netfilter subsystem in the Linux kernel did not properly validate sets with multiple ranged fields. A local attacker could use this to cause a denial of service or execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2022-1966, CVE-2022-1972
SHA-256 | da3d1ebf8a062796a4bf895e4a7b5810ebe229e969e2a6e2a191ecc53f90dbfe
Kernel Live Patch Security Notice LSN-0086-1
Posted Jun 3, 2022
Authored by Benjamin M. Romer

It was discovered that a race condition existed in the network scheduling subsystem of the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the Linux kernel did not properly restrict access to the cgroups v1 release_agent feature. A local attacker could use this to gain administrative privileges. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2021-39713, CVE-2022-0492, CVE-2022-1055, CVE-2022-1116, CVE-2022-21499, CVE-2022-29581, CVE-2022-30594
SHA-256 | d764344ffd074691e5125e0c7ecb9972329d587b004cdad9acfe1fafabfb0253
Kernel Live Patch Security Notice LSN-0085-1
Posted Mar 24, 2022
Authored by Benjamin M. Romer

Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the Linux kernel did not properly restrict access to the cgroups v1 release_agent feature. A local attacker could use this to gain administrative privileges. Nick Gregory discovered that the Linux kernel incorrectly handled network offload functionality. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2022-0492, CVE-2022-25636
SHA-256 | 2192c199581e31d17ad1f82ccb72319fb36da887cc27a4431990dced1f3967d7
Kernel Live Patch Security Notice LSN-0084-1
Posted Jan 20, 2022
Authored by Benjamin M. Romer

William Liu and Jamie Hill-Daniel discovered that the file system context functionality in the Linux kernel contained an integer underflow vulnerability, leading to an out-of-bounds write. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2022-0185
SHA-256 | ebdd28169715872d3dae12d04faac30cc03a75e8432f2814b583409805684cf6
Kernel Live Patch Security Notice LSN-0083-1
Posted Jan 6, 2022
Authored by Benjamin M. Romer

The BPF subsystem in the Linux kernel before 4.17 mishandles situations with a long jump over an instruction sequence where inner instructions require substantial expansions into multiple BPF instructions, leading to an overflow. This affects kernel/bpf/core.c and net/core/filter.c. Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host’s physical memory. Other vulnerabilities have also been addressed.

tags | advisory, overflow, kernel, vulnerability
systems | linux
advisories | CVE-2018-25020, CVE-2021-22555, CVE-2021-33909, CVE-2021-3653, CVE-2021-4002
SHA-256 | ddd1e7fc677c2b02d3351058bf31466aa231865f93abfb9cdfa1d1ca55622f8d
Kernel Live Patch Security Notice LSN-0082-1
Posted Nov 12, 2021
Authored by Benjamin M. Romer

Jann Horn discovered that the tty subsystem of the Linux kernel did not use consistent locking in some situations, leading to a read-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information (kernel memory). De4dCr0w of 360 Alpha Lab discovered that the BPF verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker could use this to expose sensitive information (kernel memory) or possibly execute arbitrary code. Various other vulnerabilities were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local, vulnerability
systems | linux
advisories | CVE-2020-29660, CVE-2020-29661, CVE-2021-3444, CVE-2021-3715
SHA-256 | 4c43b77dc14ec38d515895508c90603e29e4435a67390143e2cb91e68bc70e9d
Kernel Live Patch Security Notice LSN-0081-1
Posted Sep 14, 2021
Authored by Benjamin M. Romer

Maxim Levitsky discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel did not properly prevent a guest VM from enabling AVIC in nested guest VMs. An attacker in a guest VM could use this to write to portions of the host’s physical memory. Maxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor implementation for AMD processors in the Linux kernel allowed a guest VM to disable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a guest VM could use this to read or write portions of the host's physical memory. Various other vulnerabilities were also addressed.

tags | advisory, kernel, vulnerability
systems | linux
advisories | CVE-2021-22555, CVE-2021-33909, CVE-2021-3653, CVE-2021-3656
SHA-256 | 051e461652f3d7e1d5f1bd5ab2e8d9f2f9a398877fa90de84818f4955d1a2074
Kernel Live Patch Security Notice LSN-0080-1
Posted Aug 18, 2021
Authored by Benjamin M. Romer

Andy Nguyen discovered that the netfilter subsystem in the Linux kernel contained an out-of-bounds write in its setsockopt() implementation. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2021-22555
SHA-256 | 4af31b963bddcf331a7037ea35c40e4fbfd445f815d8756856219abad1f16c71
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