Published: 27/09/2021 Updated: 14/06/2022

CVSS v2 Base Score: 4.9 | Impact Score: 6.9 | Exploitability Score: 3.9

CVSS v3 Base Score: 4.4 | Impact Score: 3.6 | Exploitability Score: 0.8

VMScore: 437

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

It exists that the aufs file system in the Linux kernel did not properly maintain POSIX ACL xattr data, when mounted with the non-default allow_userns option. A local attacker could possibly use this to gain elevated privileges. (CVE-2016-2854) ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well.

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linux linux kernel
linux linux kernel 5.4
debian debian linux 9.0
debian debian linux 10.0

Several security issues were fixed in the Linux kernel ...

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks CVE-2020-29374 Jann Horn of Google reported a flaw in Linux's virtual memory management A parent and child process initially share all their memory, but when either writes to a shared page, ...

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/timerqueuec 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 The highest threat from this vulnerability is ...

CWE-665 https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=511885d7061eda3eb1faf3f57dcc936ff75863f1 https://bugzilla.redhat.com/show_bug.cgi?id=2005258 https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html https://www.debian.org/security/2022/dsa-5096 https://cert-portal.siemens.com/productcert/pdf/ssa-222547.pdf https://nvd.nist.gov https://ubuntu.com/security/notices/USN-5343-1 https://www.cisa.gov/uscert/ics/advisories/icsa-22-167-09

CVE-2021-20317

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