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CVE-2020-12655

Status Candidate

Overview

An issue was discovered in xfs_agf_verify in fs/xfs/libxfs/xfs_alloc.c in the Linux kernel through 5.6.10. Attackers may trigger a sync of excessive duration via an XFS v5 image with crafted metadata, aka CID-d0c7feaf8767.

Related Files

Ubuntu Security Notice USN-5343-1
Posted Mar 23, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5343-1 - 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. It was discovered that the aufs file system in the Linux kernel did not properly restrict mount namespaces, when mounted with the non-default allow_userns option set. A local attacker could use this to gain administrative privileges.

tags | advisory, kernel, local
systems | linux, ubuntu
advisories | CVE-2016-2853, CVE-2016-2854, CVE-2018-5995, CVE-2019-19449, CVE-2020-12655, CVE-2020-25670, CVE-2020-25673, CVE-2020-26139, CVE-2020-26147, CVE-2020-26555, CVE-2020-26558, CVE-2020-36322, CVE-2020-36385, CVE-2021-20292, CVE-2021-20317, CVE-2021-23134, CVE-2021-28688, CVE-2021-28972, CVE-2021-29650, CVE-2021-32399, CVE-2021-33033, CVE-2021-33034, CVE-2021-33098, CVE-2021-34693, CVE-2021-3483, CVE-2021-3506, CVE-2021-3564
SHA-256 | f52b839ff13c30e863d5be66f515f639c4bbf6c3ac1911f54911c3a1db6abad1
Ubuntu Security Notice USN-4485-1
Posted Sep 2, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4485-1 - Timothy Michaud discovered that the i915 graphics driver in the Linux kernel did not properly validate user memory locations for the i915_gem_execbuffer2_ioctl. A local attacker could possibly use this to cause a denial of service or execute arbitrary code. It was discovered that the Kvaser CAN/USB driver in the Linux kernel did not properly initialize memory in certain situations. A local attacker could possibly use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2018-20669, CVE-2019-19947, CVE-2019-20810, CVE-2020-10732, CVE-2020-10766, CVE-2020-10767, CVE-2020-10768, CVE-2020-10781, CVE-2020-12655, CVE-2020-12656, CVE-2020-12771, CVE-2020-13974, CVE-2020-15393, CVE-2020-24394
SHA-256 | a61831f926ce25ea97d8bd2b2fe2ff6627483599c3f1ee6249023bd9550e4f67
Ubuntu Security Notice USN-4483-1
Posted Sep 2, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4483-1 - Chuhong Yuan discovered that go7007 USB audio device driver in the Linux kernel did not properly deallocate memory in some failure conditions. A physically proximate attacker could use this to cause a denial of service. Fan Yang discovered that the mremap implementation in the Linux kernel did not properly handle DAX Huge Pages. A local attacker with access to DAX storage could use this to gain administrative privileges. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-20810, CVE-2020-10757, CVE-2020-10766, CVE-2020-10767, CVE-2020-10768, CVE-2020-10781, CVE-2020-12655, CVE-2020-12656, CVE-2020-12771, CVE-2020-13974, CVE-2020-14356, CVE-2020-15393, CVE-2020-24394
SHA-256 | f3d7b343dd037f207841d31eaef395a9ef8aa891f0b3d52ff6fe53d20c95c23f
Red Hat Security Advisory 2020-3545-01
Posted Aug 25, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3545-01 - The kernel-alt packages provide the Linux kernel version 4.x. Issues addressed include buffer over-read and denial of service vulnerabilities.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2019-19046, CVE-2020-10769, CVE-2020-12655
SHA-256 | e9a5fd11dfc8de5af3713c57b58aff60f4db565a5aea2eaec6ad209e2c779c99
Ubuntu Security Notice USN-4465-1
Posted Aug 19, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4465-1 - It was discovered that the XFS file system implementation in the Linux kernel did not properly validate meta data in some circumstances. 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 bcache subsystem in the Linux kernel did not properly release a lock in some error conditions. A local attacker could possibly 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-2020-12655, CVE-2020-12771, CVE-2020-15393
SHA-256 | d61918c79cfb7d2a7c42dc5a881a9fdf1bf9ceb9e554b0b44c7668274b983ab2
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