Amazon Linux 1 Security Advisory: ALAS-2021-1516
Advisory Release Date: 2021-07-08 18:38 Pacific
Advisory Updated Date: 2024-04-25 16:04 Pacific
FAQs regarding Amazon Linux ALAS/CVE Severity
2024-04-25: CVE-2021-46938 was added to this advisory.
A denial-of-service (DoS) flaw was identified in the Linux kernel due to an incorrect memory barrier in xt_replace_table in net/netfilter/x_tables.c in the netfilter subsystem. (CVE-2021-29650)
A flaw was found in kernel/bpf/verifier.c in BPF in the Linux kernel. An incorrect limit is enforced for pointer arithmetic operations which can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. (CVE-2021-33200)
In the Linux kernel, the following vulnerability has been resolved:
dm rq: fix double free of blk_mq_tag_set in dev remove after table load fails (CVE-2021-46938)
Affected Packages:
kernel
Issue Correction:
Run yum update kernel to update your system.
i686:
kernel-tools-debuginfo-4.14.238-125.421.amzn1.i686
kernel-headers-4.14.238-125.421.amzn1.i686
perf-4.14.238-125.421.amzn1.i686
kernel-4.14.238-125.421.amzn1.i686
kernel-debuginfo-4.14.238-125.421.amzn1.i686
kernel-tools-4.14.238-125.421.amzn1.i686
kernel-devel-4.14.238-125.421.amzn1.i686
kernel-tools-devel-4.14.238-125.421.amzn1.i686
kernel-debuginfo-common-i686-4.14.238-125.421.amzn1.i686
perf-debuginfo-4.14.238-125.421.amzn1.i686
src:
kernel-4.14.238-125.421.amzn1.src
x86_64:
perf-4.14.238-125.421.amzn1.x86_64
kernel-tools-debuginfo-4.14.238-125.421.amzn1.x86_64
kernel-4.14.238-125.421.amzn1.x86_64
kernel-headers-4.14.238-125.421.amzn1.x86_64
kernel-debuginfo-common-x86_64-4.14.238-125.421.amzn1.x86_64
kernel-tools-devel-4.14.238-125.421.amzn1.x86_64
kernel-debuginfo-4.14.238-125.421.amzn1.x86_64
kernel-devel-4.14.238-125.421.amzn1.x86_64
perf-debuginfo-4.14.238-125.421.amzn1.x86_64
kernel-tools-4.14.238-125.421.amzn1.x86_64