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CVE-2023-40283

Status Candidate

Overview

An issue was discovered in l2cap_sock_release in net/bluetooth/l2cap_sock.c in the Linux kernel before 6.4.10. There is a use-after-free because the children of an sk are mishandled.

Related Files

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
Ubuntu Security Notice USN-6396-3
Posted Oct 17, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6396-3 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information.

tags | advisory, x86, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-40982, CVE-2023-3212, CVE-2023-3863, CVE-2023-40283, CVE-2023-4128
SHA-256 | 8232218ebf9db1d697b359db5fb1b03f5377448ae5c7c7556b00fe639696885f
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
Ubuntu Security Notice USN-6396-2
Posted Oct 5, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6396-2 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information.

tags | advisory, x86, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-40982, CVE-2023-3212, CVE-2023-3863, CVE-2023-40283, CVE-2023-4128
SHA-256 | 70922139c6b034f316eb5edab38f72e40e1c058b73dbdd7a944c8bf477ad69b9
Ubuntu Security Notice USN-6386-3
Posted Oct 4, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6386-3 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. 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, ubuntu
advisories | CVE-2023-20588, CVE-2023-40283, CVE-2023-4128, CVE-2023-4569
SHA-256 | 9e6acdc1fc5617ecd41b5df8f4a74a5d8fff08867f2f3ba7e58deb983fa599cf
Ubuntu Security Notice USN-6386-2
Posted Sep 29, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6386-2 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. 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, ubuntu
advisories | CVE-2023-20588, CVE-2023-40283, CVE-2023-4128, CVE-2023-4569
SHA-256 | 7cd557b2e2e3d2b14432e8c2e2789eb58ccb6872a0ba1afc3e86b015c5384f97
Ubuntu Security Notice USN-6387-2
Posted Sep 27, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6387-2 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. 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, ubuntu
advisories | CVE-2023-20588, CVE-2023-40283, CVE-2023-4128
SHA-256 | f996b052a5d8a42382af173d99592c385d1379e5d06dd710df420741bae776f9
Ubuntu Security Notice USN-6396-1
Posted Sep 27, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6396-1 - It was discovered that some AMD x86-64 processors with SMT enabled could speculatively execute instructions using a return address from a sibling thread. A local attacker could possibly use this to expose sensitive information. Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information.

tags | advisory, x86, local
systems | linux, ubuntu
advisories | CVE-2022-27672, CVE-2022-40982, CVE-2023-3212, CVE-2023-3863, CVE-2023-40283, CVE-2023-4128
SHA-256 | 04f83418015d33b3205d491de8dc8ecd62f2ec112f80bc56af999e0c615748fa
Ubuntu Security Notice USN-6386-1
Posted Sep 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6386-1 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. 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, ubuntu
advisories | CVE-2023-20588, CVE-2023-40283, CVE-2023-4128, CVE-2023-4569
SHA-256 | bb3fec09c344ab02a8e97c9b05a2f5ec011b794fb1ce3732497d718508ca5052
Ubuntu Security Notice USN-6387-1
Posted Sep 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6387-1 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. 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, ubuntu
advisories | CVE-2023-20588, CVE-2023-40283, CVE-2023-4128
SHA-256 | c0503fcadf446594e99db5136af477c331197a884e138a890263895d3afaf2c4
Ubuntu Security Notice USN-6388-1
Posted Sep 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6388-1 - Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information. Yang Lan discovered that the GFS2 file system implementation in the Linux kernel could attempt to dereference a null pointer in some situations. An attacker could use this to construct a malicious GFS2 image that, when mounted and operated on, could cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2022-40982, CVE-2023-3212, CVE-2023-32269, CVE-2023-3863, CVE-2023-40283, CVE-2023-4128, CVE-2023-4385, CVE-2023-4387, CVE-2023-4459
SHA-256 | c7b2ed8513e23fcfddfc331701b72291460bb91a9488a2abfbd0460416e7472e
Ubuntu Security Notice USN-6383-1
Posted Sep 20, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6383-1 - Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. It was discovered that the ARM64 KVM implementation in the Linux kernel did not properly restrict hypervisor memory access. An attacker in a guest VM could use this to execute arbitrary code in the host OS.

tags | advisory, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2023-20588, CVE-2023-21264, CVE-2023-40283, CVE-2023-4128, CVE-2023-4569
SHA-256 | c5be03314d6525a0dd88d31e6ba90e7d12a4b76d20a1e301e71a80a7805ade26
Ubuntu Security Notice USN-6343-1
Posted Sep 6, 2023
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 6343-1 - It was discovered that the IPv6 implementation in the Linux kernel contained a high rate of hash collisions in connection lookup table. A remote attacker could use this to cause a denial of service. Ross Lagerwall discovered that the Xen netback backend driver in the Linux kernel did not properly handle certain unusual packets from a paravirtualized network frontend, leading to a buffer overflow. An attacker in a guest VM could use this to cause a denial of service or possibly execute arbitrary code.

tags | advisory, remote, denial of service, overflow, arbitrary, kernel
systems | linux, ubuntu
advisories | CVE-2023-1206, CVE-2023-34319, CVE-2023-40283, CVE-2023-4128, CVE-2023-4155, CVE-2023-4194, CVE-2023-4273
SHA-256 | 7110047976f0ec67dc61de4540495873aa7a04b2a42b9e6129b9fe9d882af93f
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