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CVE-2018-20856

Status Candidate

Overview

An issue was discovered in the Linux kernel before 4.18.7. In block/blk-core.c, there is an __blk_drain_queue() use-after-free because a certain error case is mishandled.

Related Files

Red Hat Security Advisory 2020-0698-01
Posted Mar 3, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0698-01 - This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. Issues addressed include a use-after-free vulnerability.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2018-20856
SHA-256 | 4acbdf80508c41123e5d0d93ef9f016b4d2a91390e5c809eecf45a244a37e858
Red Hat Security Advisory 2020-0664-01
Posted Mar 3, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0664-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow, heap overflow, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-20856, CVE-2019-14816, CVE-2019-14895, CVE-2019-17133
SHA-256 | 8c1f96fceed0781f4ec0f4d1d7246e231bd211118ad046fc05b7bc2419d23b29
Red Hat Security Advisory 2020-0543-01
Posted Feb 18, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0543-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include buffer overflow and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-20856, CVE-2018-20976, CVE-2019-11085, CVE-2019-11599, CVE-2019-14895, CVE-2019-17133, CVE-2019-17666
SHA-256 | 8ab8efed79f5f3bd7cd516f00264a695888543a958fe8fbb221191731955a067
Red Hat Security Advisory 2020-0103-01
Posted Jan 14, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0103-01 - 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-2018-10853, CVE-2018-18281, CVE-2018-20856, CVE-2019-11599, CVE-2019-6974
SHA-256 | fcb90197bf847c6ebafd82de864d910086dc1d311169e67eb45ec1ca8f2ab402
Red Hat Security Advisory 2020-0100-01
Posted Jan 14, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0100-01 - 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-2018-18281, CVE-2018-20856, CVE-2019-11599
SHA-256 | a496efe6c540f0dbcf5379a134ce5b2024588daefb242c5104a38024a949a636
Red Hat Security Advisory 2019-3217-01
Posted Oct 29, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3217-01 - The kernel-alt packages provide the Linux kernel version 4.x. Issues addressed include buffer overflow, denial of service, null pointer, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-10902, CVE-2018-20856, CVE-2019-11810, CVE-2019-9500, CVE-2019-9506
SHA-256 | e72ee12fb3f5c4cd584a9fc7d93f5b552bb25f83f3adabd54be890f793989a90
Kernel Live Patch Security Notice LSN-0058-1
Posted Oct 23, 2019
Authored by Benjamin M. Romer

It was discovered that a race condition existed in the GFS2 file system in the Linux kernel. A local attacker could possibly use this to cause a denial of service (system crash). It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly 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-2016-10905, CVE-2018-20856, CVE-2018-20961, CVE-2018-20976, CVE-2018-21008, CVE-2019-0136, CVE-2019-10126, CVE-2019-10207, CVE-2019-11477, CVE-2019-11478, CVE-2019-11833, CVE-2019-12614, CVE-2019-14283, CVE-2019-14284, CVE-2019-14814, CVE-2019-14815, CVE-2019-14816, CVE-2019-14821, CVE-2019-14835, CVE-2019-2054, CVE-2019-2181, CVE-2019-3846
SHA-256 | 5442de6a129171e9103a7acd9d861ab0fda6074505e32a4ad08db9df45b30c61
Red Hat Security Advisory 2019-3089-01
Posted Oct 16, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3089-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include heap overflow and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-20856, CVE-2019-10126, CVE-2019-3846, CVE-2019-9506
SHA-256 | 966191adf587e5eeb40216903077535c4dc132a4409dc0d25b960c04cedd1fb2
Red Hat Security Advisory 2019-3055-01
Posted Oct 15, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3055-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include denial of service, heap overflow, and use-after-free vulnerabilities.

tags | advisory, denial of service, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-20856, CVE-2019-10126, CVE-2019-3846, CVE-2019-9506
SHA-256 | b027026790de1e5b3df9960c8b8f9634c244c64fc94d9cca1b1eec152bf4de1d
Red Hat Security Advisory 2019-3076-01
Posted Oct 15, 2019
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2019-3076-01 - This is a kernel live patch module which is automatically loaded by the RPM post-install script to modify the code of a running kernel. Issues addressed include heap overflow and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2018-20856, CVE-2019-10126, CVE-2019-3846, CVE-2019-9506
SHA-256 | fead7025c4a582d00ff91a7edb01aaff16cd6ed600d6c13699241d8d720209a9
Kernel Live Patch Security Notice LSN-0055-1
Posted Sep 7, 2019
Authored by Benjamin M. Romer

It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of service (system crash) or possibly execute arbitrary code. It was discovered that the Bluetooth UART implementation in the Linux kernel did not properly check for missing tty operations. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux
advisories | CVE-2018-20856, CVE-2019-10207, CVE-2019-11478, CVE-2019-13233, CVE-2019-14283, CVE-2019-14284
SHA-256 | 8660e81d1dad1d0ff9a78d762c78b37cd4c52f125cddd39f7636189484d3352f
Ubuntu Security Notice USN-4118-1
Posted Sep 3, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4118-1 - It was discovered that the alarmtimer implementation in the Linux kernel contained an integer overflow vulnerability. A local attacker could use this to cause a denial of service. 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, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2018-13053, CVE-2018-13093, CVE-2018-13098, CVE-2018-13099, CVE-2018-13100, CVE-2018-14610, CVE-2018-14611, CVE-2018-14612, CVE-2018-14614, CVE-2018-14616, CVE-2018-14617, CVE-2018-16862, CVE-2018-19985, CVE-2018-20169, CVE-2018-20511, CVE-2018-20784, CVE-2018-20856, CVE-2018-5383, CVE-2019-0136, CVE-2019-10126, CVE-2019-10207, CVE-2019-10638, CVE-2019-10639, CVE-2019-11085, CVE-2019-11487, CVE-2019-11599
SHA-256 | 4f908bb81d9ebb9dd129fad885aa16a8ad89f97c5c09adc998aefff895ea8268
Ubuntu Security Notice USN-4116-1
Posted Sep 2, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4116-1 - It was discovered that a use-after-free error existed in the block layer subsystem of the Linux kernel when certain failure conditions occurred. A local attacker could possibly use this to cause a denial of service or possibly execute arbitrary code. Amit Klein and Benny Pinkas discovered that the Linux kernel did not sufficiently randomize IP ID values generated for connectionless networking protocols. A remote attacker could use this to track particular Linux devices. Various other issues were also addressed.

tags | advisory, remote, denial of service, arbitrary, kernel, local, protocol
systems | linux, ubuntu
advisories | CVE-2018-20856, CVE-2019-10638, CVE-2019-13648, CVE-2019-14283, CVE-2019-14284, CVE-2019-3900
SHA-256 | b73564f87dfc581b5bd179a2b32bdd4fb0dc2588d71e0178cda6933e79afaedd
Slackware Security Advisory - Slackware 14.2 kernel Updates
Posted Aug 14, 2019
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New kernel packages are available for Slackware 14.2 to fix security issues.

tags | advisory, kernel
systems | linux, slackware
advisories | CVE-2017-18509, CVE-2018-20856, CVE-2019-10207, CVE-2019-1125, CVE-2019-13631, CVE-2019-13648, CVE-2019-14283, CVE-2019-14284
SHA-256 | df2590c5f88d59fdcc37012523b2a9b2ccfd05d889684ca712f8fa07eb824c68
Debian Security Advisory 4497-1
Posted Aug 13, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4497-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, kernel, vulnerability
systems | linux, debian
advisories | CVE-2015-8553, CVE-2018-20836, CVE-2018-20856, CVE-2018-5995, CVE-2019-10207, CVE-2019-10638, CVE-2019-10639, CVE-2019-1125, CVE-2019-13631, CVE-2019-13648, CVE-2019-14283, CVE-2019-14284, CVE-2019-3882, CVE-2019-3900
SHA-256 | cee950c7a38acaeb09d9f7015b9d152f8f4ee558e852c5e251edd7491b655338
Ubuntu Security Notice USN-4094-1
Posted Aug 13, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4094-1 - It was discovered that the alarmtimer implementation in the Linux kernel contained an integer overflow vulnerability. A local attacker could use this to cause a denial of service. 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, overflow, kernel, local
systems | linux, ubuntu
advisories | CVE-2018-13053, CVE-2018-13093, CVE-2018-13096, CVE-2018-13098, CVE-2018-13099, CVE-2018-13100, CVE-2018-14609, CVE-2018-14610, CVE-2018-14613, CVE-2018-14614, CVE-2018-14617, CVE-2018-16862, CVE-2018-20169, CVE-2018-20511, CVE-2018-20856, CVE-2018-5383, CVE-2019-10126, CVE-2019-1125, CVE-2019-12614, CVE-2019-12818, CVE-2019-12819, CVE-2019-12984, CVE-2019-13233, CVE-2019-13272, CVE-2019-2024, CVE-2019-2101, CVE-2019-3846
SHA-256 | 057991c54bda99e36e45617061b5319a3d5749216d070d59b5d605ff61ea7dcc
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