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CVE-2021-20317

Status Candidate

Overview

A flaw was found in the Linux kernel. A corrupted timer tree caused the task wakeup to be missing in the timerqueue_add function in lib/timerqueue.c. This flaw allows a local attacker with special user privileges to cause a denial of service, slowing and eventually stopping the system while running OSP.

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-5209-1
Posted Jan 6, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5209-1 - Nadav Amit discovered that the hugetlb implementation in the Linux kernel did not perform TLB flushes under certain conditions. A local attacker could use this to leak or alter data from other processes that use huge pages. It was discovered that a race condition existed in the timer implementation in the Linux kernel. A privileged attacker could use this cause a denial of service.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2021-20317, CVE-2021-20321, CVE-2021-3760, CVE-2021-4002, CVE-2021-41864, CVE-2021-43389
SHA-256 | 48064c7ea8ce65c4e3051e87cd43253fcf2b6a445eea15418d3b3f219708afba
Red Hat Security Advisory 2021-5038-04
Posted Dec 9, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-5038-04 - Red Hat Advanced Cluster Management for Kubernetes 2.2.10 images Red Hat Advanced Cluster Management for Kubernetes provides the capabilities to address common challenges that administrators and site reliability engineers face as they work across a range of public and private cloud environments. Clusters and applications are all visible and managed from a single console — with security policy built in. This advisory contains the container images for Red Hat Advanced Cluster Management for Kubernetes, which provide security fixes, bug fixes and container upgrades. Issues addressed include a bypass vulnerability.

tags | advisory, bypass
systems | linux, redhat
advisories | CVE-2018-20673, CVE-2019-13750, CVE-2019-13751, CVE-2019-17594, CVE-2019-17595, CVE-2019-18218, CVE-2019-19603, CVE-2019-20838, CVE-2019-5827, CVE-2020-12762, CVE-2020-13435, CVE-2020-14145, CVE-2020-14155, CVE-2020-16135, CVE-2020-24370, CVE-2020-36385, CVE-2021-20231, CVE-2021-20232, CVE-2021-20266, CVE-2021-20271, CVE-2021-20317, CVE-2021-22876, CVE-2021-22898, CVE-2021-22925, CVE-2021-22946, CVE-2021-22947
SHA-256 | 8c3861dc2826e4a0c7c98f1040e5e156c43227dbe0c19621db0bee3cb77b04e4
Red Hat Security Advisory 2021-4914-06
Posted Dec 3, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4914-06 - OpenShift Virtualization is Red Hat's virtualization solution designed for Red Hat OpenShift Container Platform. This advisory contains the following OpenShift Virtualization 4.8.3 images: RHEL-8-CNV-4.8.

tags | advisory
systems | linux, redhat
advisories | CVE-2018-20673, CVE-2019-13750, CVE-2019-13751, CVE-2019-17594, CVE-2019-17595, CVE-2019-18218, CVE-2019-19603, CVE-2019-20838, CVE-2019-5827, CVE-2020-12762, CVE-2020-13435, CVE-2020-14155, CVE-2020-16135, CVE-2020-24370, CVE-2020-25648, CVE-2020-36385, CVE-2021-0512, CVE-2021-20231, CVE-2021-20232, CVE-2021-20266, CVE-2021-20317, CVE-2021-22876, CVE-2021-22898, CVE-2021-22925, CVE-2021-22946, CVE-2021-22947
SHA-256 | fd59966d097a080a7ded93322ccdd6a60d15159920ee6f8c093487695abfb467
Red Hat Security Advisory 2021-4875-04
Posted Dec 1, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4875-04 - 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-2020-36385, CVE-2021-20317
SHA-256 | 7182b04b0c95c9c305f359918990a1f42023f58b97531d86592fbe56852dacb5
Red Hat Security Advisory 2021-4871-05
Posted Dec 1, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4871-05 - 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-2020-36385, CVE-2021-20317
SHA-256 | b512fabc2f0ea31c77c3c04ecd89595372d88866b57e93e61ded1e641a083c9d
Red Hat Security Advisory 2021-4646-01
Posted Nov 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4646-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-20317, CVE-2021-43267
SHA-256 | 05def5d681747b437fdd2a5c3e4955aac707baf60b3048864ae74bf842a890d7
Red Hat Security Advisory 2021-4647-01
Posted Nov 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4647-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-20317, CVE-2021-43267
SHA-256 | c9088bb36ca27ce4ecf566d11cc5445a00a904ba22e4d1f3c4a0d4c5b3a546ec
Red Hat Security Advisory 2021-4650-01
Posted Nov 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4650-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-20317, CVE-2021-28950, CVE-2021-43267
SHA-256 | 30db52979e8346ae4a03a9bc7a7634ce9e814982f05e67050bd6541094c56531
Red Hat Security Advisory 2021-4648-01
Posted Nov 15, 2021
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2021-4648-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

tags | advisory, kernel
systems | linux, redhat
advisories | CVE-2021-20317, CVE-2021-28950, CVE-2021-43267
SHA-256 | efed1a8f4077bc4612ff4f66517074e78af2aa949ac9c1d0694d41fcc4c884e4
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