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Kernel Files

Ubuntu Security Notice USN-4750-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4750-1 - Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25669, CVE-2020-27815, CVE-2020-28588, CVE-2020-28941, CVE-2020-29568, CVE-2020-29569, CVE-2020-29660, CVE-2020-29661, CVE-2021-20177
MD5 | c85137173facaaae05662060f5c26ad1
Ubuntu Security Notice USN-4749-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4749-1 - Bodong Zhao discovered a use-after-free in the Sun keyboard driver implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-25669, CVE-2020-27815, CVE-2020-29374, CVE-2020-29568, CVE-2020-29569, CVE-2020-29660, CVE-2020-29661
MD5 | e814a088294feb0a838a75b2880951cd
Ubuntu Security Notice USN-4748-1
Posted Feb 25, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4748-1 - It was discovered that the jfs file system implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to possibly cause a denial of service. It was discovered that the memory management subsystem in the Linux kernel did not properly handle copy-on-write operations in some situations. A local attacker could possibly use this to gain unintended write access to read-only memory pages. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2020-27815, CVE-2020-29374, CVE-2020-29568, CVE-2020-29660, CVE-2020-29661
MD5 | 89dfc2cac6b4f51b038cdb39707b3c65
Red Hat Security Advisory 2021-0558-01
Posted Feb 16, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0558-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-14351, CVE-2020-25705, CVE-2020-29661
MD5 | 29e5b5f5ad89979710c939d3bf99443e
Red Hat Security Advisory 2021-0537-01
Posted Feb 16, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0537-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-14351, CVE-2020-25705, CVE-2020-29661
MD5 | 63a8c1a37737b69aac454d643e34f00d
Red Hat Security Advisory 2021-0526-01
Posted Feb 16, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0526-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-24394, CVE-2020-25212
MD5 | b77659dbbebfe332a9da91ae52d792d4
Ubuntu Security Notice USN-4713-2
Posted Feb 10, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4713-2 - It was discovered that the LIO SCSI target implementation in the Linux kernel performed insufficient identifier checking in certain XCOPY requests. An attacker with access to at least one LUN in a multiple backstore environment could use this to expose sensitive information or modify data.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2020-28374
MD5 | bdc9412645c3c7bcad2191d791d8de6c
Ubuntu Security Notice USN-4727-1
Posted Feb 10, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4727-1 - Alexander Popov discovered that multiple race conditions existed in the AF_VSOCK implementation in the Linux kernel. 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, ubuntu
advisories | CVE-2021-26708
MD5 | a8c89d3cda17bd2462a03e3fd24d9971
XNU Kernel Mach Message Trailers Memory Disclosure
Posted Feb 5, 2021
Authored by Google Security Research, ianbeer

The XNU kernel suffers from a memory disclosure vulnerability in mach message trailers.

tags | exploit, kernel
advisories | CVE-2020-27950
MD5 | fd485ea94f3d1c1a1348a97feddde88b
XNU Kernel Turnstiles Type Confusion
Posted Feb 5, 2021
Authored by Google Security Research, ianbeer

The XNU kernel suffers from a type confusion vulnerability in turnstiles.

tags | exploit, kernel
advisories | CVE-2020-27932
MD5 | a0391836c332c430261f0d75f705ed5a
Red Hat Security Advisory 2021-0338-01
Posted Feb 2, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0338-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-15436, CVE-2020-35513
MD5 | 622a677916efe5c5b11e12950ab8bf03
Red Hat Security Advisory 2021-0336-01
Posted Feb 2, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0336-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include double free and use-after-free vulnerabilities.

tags | advisory, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2020-15436, CVE-2020-35513
MD5 | f44a5df5279667be9b9e82ed77f90f2e
Red Hat Security Advisory 2021-0346-01
Posted Feb 2, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0346-01 - Kernel-based Virtual Machine is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-ma packages provide the user-space component for running virtual machines that use KVM on the IBM z Systems, IBM Power, and 64-bit ARM architectures. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-16092, CVE-2020-1983
MD5 | ff71ebeb4616744f4e2e55ba85fc8af8
Red Hat Security Advisory 2021-0347-01
Posted Feb 2, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0347-01 - Kernel-based Virtual Machine is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. Issues addressed include code execution and out of bounds access vulnerabilities.

tags | advisory, kernel, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2020-13765, CVE-2020-16092
MD5 | 1d5f9973a1bb6bde25d7796739928d55
Red Hat Security Advisory 2021-0354-01
Posted Feb 2, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0354-01 - The kernel-alt packages provide the Linux kernel version 4.x. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-15436, CVE-2020-1749, CVE-2020-29661
MD5 | b37b38356982e78ff86c720ade552d87
Kernel Live Patch Security Notice LSN-0074-1
Posted Feb 1, 2021
Authored by Benjamin M. Romer

Elena Petrova discovered that the pin controller device tree implementation in the Linux kernel did not properly handle string references. A local attacker could use this to expose sensitive information (kernel memory). Andy Nguyen discovered that the Bluetooth A2MP implementation in the Linux kernel did not properly initialize memory in some situations. A physically proximate remote attacker could use this to expose sensitive information (kernel memory). Various other issues were also addressed.

tags | advisory, remote, kernel, local
systems | linux
advisories | CVE-2020-0427, CVE-2020-12352, CVE-2020-25645, CVE-2020-28374
MD5 | 6330d3eeacc7aa6e678f919eefeb140b
Ubuntu Security Notice USN-4712-1
Posted Jan 28, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4712-1 - USN-4576-1 fixed a vulnerability in the overlay file system implementation in the Linux kernel. Unfortunately, that fix introduced a regression that could incorrectly deny access to overlay files in some situations. This update fixes the problem.

tags | advisory, kernel
systems | linux, ubuntu
MD5 | ba3b04076200630b1b79bc54fcab8b18
Ubuntu Security Notice USN-4713-1
Posted Jan 28, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4713-1 - It was discovered that the LIO SCSI target implementation in the Linux kernel performed insufficient identifier checking in certain XCOPY requests. An attacker with access to at least one LUN in a multiple backstore environment could use this to expose sensitive information or modify data.

tags | advisory, kernel
systems | linux, ubuntu
advisories | CVE-2020-28374
MD5 | 93b60be65f3b9617bbda04c469a600da
Ubuntu Security Notice USN-4711-1
Posted Jan 28, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4711-1 - It was discovered that the LIO SCSI target implementation in the Linux kernel performed insufficient identifier checking in certain XCOPY requests. An attacker with access to at least one LUN in a multiple backstore environment could use this to expose sensitive information or modify data. Kiyin discovered that the perf subsystem in the Linux kernel did not properly deallocate memory in some situations. A privileged attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2020-25704, CVE-2020-28374
MD5 | 862338ce60446f35a002c294d4ef7d48
Ubuntu Security Notice USN-4710-1
Posted Jan 28, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4710-1 - Kiyin discovered that the perf subsystem in the Linux kernel did not properly deallocate memory in some situations. A privileged attacker could use this to cause a denial of service.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2020-25704
MD5 | 8bceee49b044da87d9c7e4b287cb8ac0
Ubuntu Security Notice USN-4709-1
Posted Jan 28, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4709-1 - It was discovered that the LIO SCSI target implementation in the Linux kernel performed insufficient identifier checking in certain XCOPY requests. An attacker with access to at least one LUN in a multiple backstore environment could use this to expose sensitive information or modify data. Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly track inode validations. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2018-13093, CVE-2019-19816, CVE-2020-25669, CVE-2020-28374
MD5 | 5205f153d121a7f1d0f2c2402956e1d3
Ubuntu Security Notice USN-4708-1
Posted Jan 28, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4708-1 - Wen Xu discovered that the XFS filesystem implementation in the Linux kernel did not properly track inode validations. An attacker could use this to construct a malicious XFS image that, when mounted, could cause a denial of service. It was discovered that the btrfs file system implementation in the Linux kernel did not properly validate file system metadata in some situations. An attacker could use this to construct a malicious btrfs image that, when mounted, could cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel
systems | linux, ubuntu
advisories | CVE-2018-13093, CVE-2019-19816, CVE-2020-25669, CVE-2020-27777
MD5 | 88614c94398b165a3628eb8d6d76aa2b
Red Hat Security Advisory 2021-0258-01
Posted Jan 26, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-0258-01 - The cryptsetup packages provide a utility for setting up disk encryption using the dm-crypt kernel module. Issues addressed include an out of bounds write vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2020-14382
MD5 | 8faae84ae1a228c65e21ad58bd67bf2d
Ubuntu Security Notice USN-4689-4
Posted Jan 21, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4689-4 - USN-4689-3 fixed vulnerabilities in the NVIDIA server graphics drivers. This update provides the corresponding updates for the NVIDIA Linux DKMS kernel modules. It was discovered that the NVIDIA GPU display driver for the Linux kernel contained a vulnerability that allowed user-mode clients to access legacy privileged APIs. A local attacker could use this to cause a denial of service or escalate privileges. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local, vulnerability
systems | linux, ubuntu
advisories | CVE-2021-1052, CVE-2021-1053, CVE-2021-1056
MD5 | 67b7fedb3c56827c3051283598dae0b9
Ubuntu Security Notice USN-4689-3
Posted Jan 20, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4689-3 - It was discovered that the NVIDIA GPU display driver for the Linux kernel contained a vulnerability that allowed user-mode clients to access legacy privileged APIs. A local attacker could use this to cause a denial of service or escalate privileges. It was discovered that the NVIDIA GPU display driver for the Linux kernel did not properly validate a pointer received from userspace in some situations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-1052, CVE-2021-1053, CVE-2021-1056
MD5 | 770df623c2eb7e3a6a906c87fae96947
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