What is CVE-2021-31829?

CVE-2021-31829 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2021-31829 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-31829?

CVE-2021-31829 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Is there a patch available for CVE-2021-31829?

No patch is currently available for CVE-2021-31829. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-31829 actively exploited?

CVE-2021-31829 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-31829

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 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.

Package Linux Kernel

Published 2021-05-06

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness type

CWE-863

CVE-2021-31829 is classified as CWE-863

See CWE-863 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2021-31829 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

Mailing List Third Party Advisory
Lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VWCZ6LJLENL2C3URW5ICARTACXPFCFN2/
Lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y4X2G5YAPYJGI3PFEZZNOTRYI33GOCCZ/
Lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZI7OBCJQDNWMKLBP6MZ5NV4EUTDAMX6Q/
Kernel patch commit
http://www.openwall.com/lists/oss-security/2021/05/04/4
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/801c6058d14a82179a7ee17a4b532cac6fad067f
Patch

Details

CVE ID CVE-2021-31829

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2021-05-06

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-31829?

CVE-2021-31829 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2021-31829 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-31829?

CVE-2021-31829 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Is there a patch available for CVE-2021-31829?

No patch is currently available for CVE-2021-31829. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-31829 actively exploited?

No — CVE-2021-31829 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.