Out-of-Bounds Affecting kernel package, versions <0:4.14.214-160.339.amzn2

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A flaw was found in the JFS filesystem code in the Linux Kernel which allows a local attacker with the ability to set extended attributes to panic the system, causing memory corruption or escalating privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

• https://security.netapp.com/advisory/ntap-20210702-0004/
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-27815
• https://www.debian.org/security/2021/dsa-4843
• https://bugzilla.redhat.com/show_bug.cgi?id=1897668,
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c61b3e4839007668360ed8b87d7da96d2e59fc6c
• https://www.openwall.com/lists/oss-security/2020/11/30/5,
• https://www.openwall.com/lists/oss-security/2020/12/28/1,
• https://lists.debian.org/debian-lts-announce/2021/02/msg00018.html
• https://lists.debian.org/debian-lts-announce/2021/03/msg00010.html
• http://www.openwall.com/lists/oss-security/2020/11/30/5
• http://www.openwall.com/lists/oss-security/2020/12/28/1
• https://bugzilla.redhat.com/show_bug.cgi?id=1897668%2C
• https://www.openwall.com/lists/oss-security/2020/11/30/5%2C
• https://www.openwall.com/lists/oss-security/2020/12/28/1%2C