vulnerability
Amazon Linux AMI 2: CVE-2021-31829: Security patch for kernel (Multiple Advisories)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 2 | (AV:L/AC:L/Au:N/C:P/I:N/A:N) | May 6, 2021 | May 26, 2021 | May 20, 2026 |
Severity
2
CVSS
(AV:L/AC:L/Au:N/C:P/I:N/A:N)
Published
May 6, 2021
Added
May 26, 2021
Modified
May 20, 2026
Description
kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.
Solutions
amazon-linux-ami-2-upgrade-bpftoolamazon-linux-ami-2-upgrade-bpftool-debuginfoamazon-linux-ami-2-upgrade-kernelamazon-linux-ami-2-upgrade-kernel-debuginfoamazon-linux-ami-2-upgrade-kernel-debuginfo-common-aarch64amazon-linux-ami-2-upgrade-kernel-debuginfo-common-x86_64amazon-linux-ami-2-upgrade-kernel-develamazon-linux-ami-2-upgrade-kernel-headersamazon-linux-ami-2-upgrade-kernel-livepatch-4-14-232-176-381amazon-linux-ami-2-upgrade-kernel-toolsamazon-linux-ami-2-upgrade-kernel-tools-debuginfoamazon-linux-ami-2-upgrade-kernel-tools-develamazon-linux-ami-2-upgrade-perfamazon-linux-ami-2-upgrade-perf-debuginfoamazon-linux-ami-2-upgrade-python-perfamazon-linux-ami-2-upgrade-python-perf-debuginfo
References
- AMAZON-AL2/ALAS-2021-1636
- AMAZON-AL2/ALAS2KERNEL-5.10-2022-001
- AMAZON-AL2/ALAS2KERNEL-5.4-2022-003
- AMAZON-AL2/ALASKERNEL-5.10-2022-001
- AMAZON-AL2/ALASKERNEL-5.4-2022-003
- CVE-2021-31829
- https://attackerkb.com/topics/CVE-2021-31829
- CWE-863
- EUVD-EUVD-2021-18704
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-18704
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.