Amazon Linux 2 Security Advisory: ALAS-2021-1691
Advisory Release Date: 2021-07-20 22:24 Pacific
Advisory Updated Date: 2021-07-21 17:40 Pacific
Severity:
Important
Issue Overview:
An out-of-bounds write flaw was found in the Linux kernel's seq_file in the Filesystem layer. This flaw allows a local attacker with a user privilege to gain access to out-of-bound memory, leading to a system crash or a leak of internal kernel information. The issue results from not validating the size_t-to-int conversion prior to performing operations. The highest threat from this vulnerability is to data integrity, confidentiality and system availability. (CVE-2021-33909)
Affected Packages:
kernel
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update kernel to update your system.
New Packages:
aarch64:
kernel-4.14.238-182.422.amzn2.aarch64
kernel-headers-4.14.238-182.422.amzn2.aarch64
kernel-debuginfo-common-aarch64-4.14.238-182.422.amzn2.aarch64
perf-4.14.238-182.422.amzn2.aarch64
perf-debuginfo-4.14.238-182.422.amzn2.aarch64
python-perf-4.14.238-182.422.amzn2.aarch64
python-perf-debuginfo-4.14.238-182.422.amzn2.aarch64
kernel-tools-4.14.238-182.422.amzn2.aarch64
kernel-tools-devel-4.14.238-182.422.amzn2.aarch64
kernel-tools-debuginfo-4.14.238-182.422.amzn2.aarch64
kernel-devel-4.14.238-182.422.amzn2.aarch64
kernel-debuginfo-4.14.238-182.422.amzn2.aarch64
i686:
kernel-headers-4.14.238-182.422.amzn2.i686
src:
kernel-4.14.238-182.422.amzn2.src
x86_64:
kernel-4.14.238-182.422.amzn2.x86_64
kernel-headers-4.14.238-182.422.amzn2.x86_64
kernel-debuginfo-common-x86_64-4.14.238-182.422.amzn2.x86_64
perf-4.14.238-182.422.amzn2.x86_64
perf-debuginfo-4.14.238-182.422.amzn2.x86_64
python-perf-4.14.238-182.422.amzn2.x86_64
python-perf-debuginfo-4.14.238-182.422.amzn2.x86_64
kernel-tools-4.14.238-182.422.amzn2.x86_64
kernel-tools-devel-4.14.238-182.422.amzn2.x86_64
kernel-tools-debuginfo-4.14.238-182.422.amzn2.x86_64
kernel-devel-4.14.238-182.422.amzn2.x86_64
kernel-debuginfo-4.14.238-182.422.amzn2.x86_64
kernel-livepatch-4.14.238-182.422-1.0-0.amzn2.x86_64