Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | <= 5.12.1 |
| Fedoraproject | Fedora | 32 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing ListPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/801c6058d14a82179a7ee17a4b532cac6fad067PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing ListPatchThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/05/04/4Mailing ListPatchThird Party Advisory
- https://github.com/torvalds/linux/commit/801c6058d14a82179a7ee17a4b532cac6fad067PatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/06/msg00019.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2021-31829?
CVE-2021-31829 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 con...
How severe is CVE-2021-31829?
CVE-2021-31829 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-31829?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Fedoraproject Fedora, Debian Debian Linux.