What is CVE-2021-46974?

CVE-2021-46974 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2021-46974 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-46974?

CVE-2021-46974 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:N/I:N/A:H.

Is there a patch available for CVE-2021-46974?

No patch is currently available for CVE-2021-46974. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-46974 actively exploited?

CVE-2021-46974 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2021-46974

Medium

In the Linux kernel, the following vulnerability has been resolved: bpf: Fix masking negation logic upon negative dst register The negation logic for the case where the off_reg is sitting in the dst register is not correct given then we cannot just invert the add to a sub or vice versa. As a fix, perform the final bitwise and-op unconditionally into AX from the off_reg, then move the pointer from the src to dst and finally use AX as the source for the original pointer arithmetic operation such that the inversion yields a correct result. The single non-AX mov in between is possible given constant blinding is retaining it as it's not an immediate based operation.

Package Linux Kernel

Published 2024-02-27

Last modified 2025-01-09

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

Low

Integrity

None

Availability

High

Vector string

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

References

The following references provide additional information about CVE-2021-46974 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/0e2dfdc74a7f4036127356d42ea59388f153f42c
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2cfa537674cd1051a3b8111536d77d0558f33d5d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4d542ddb88fb2f39bf7f14caa2902f3e8d06f6ba
Patch

7 patch commits total View all on NVD

Details

CVE ID CVE-2021-46974

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-02-27

Modified 2025-01-09

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-46974?

CVE-2021-46974 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2021-46974 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-46974?

CVE-2021-46974 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:N/I:N/A:H.
Is there a patch available for CVE-2021-46974?

No patch is currently available for CVE-2021-46974. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-46974 actively exploited?

No — CVE-2021-46974 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.