What is CVE-2024-56721?

CVE-2024-56721 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, classified as a Out-of-bounds Read flaw (CWE-125), affecting Linux kernel versions from 6.10 onward and patched in 6.11.11, 6.12.2 and 6.13. CVE-2024-56721 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-56721?

CVE-2024-56721 has a CVSS score of 7.1 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2024-56721?

Yes, CVE-2024-56721 has been patched. Fixed versions include 6.11.11, 6.12.2 and 6.13. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-56721 actively exploited?

CVE-2024-56721 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/125.html

CVE-2024-56721

High

In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Terminate the erratum_1386_microcode array The erratum_1386_microcode array requires an empty entry at the end. Otherwise x86_match_cpu_with_stepping() will continue iterate the array after it ended. Add an empty entry to erratum_1386_microcode to its end.

Package Linux Kernel

Published 2024-12-29

Last modified 2025-10-01

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-125

CVE-2024-56721 is a Out-of-bounds Read vulnerability

What is Out-of-bounds Read?

The product reads data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.10 and later are affected. Fixed in 6.11.11, 6.12.2, 6.13 and their respective stable series.

Affected from

≥ 6.10

Fixed in

✓ 6.11.11 6.11.x ✓ 6.12.2 6.12.x ✓ 6.13

References

3 total

Kernel Git
https://git.kernel.org/stable/c/82d6b82cf89d950982ac240ba068c3a7e1f23b0a

Patch
Kernel Git
https://git.kernel.org/stable/c/ccfee14f08b8699132b87bc6d78e0fa75bf094dd

Patch
Kernel Git
https://git.kernel.org/stable/c/ff6cdc407f4179748f4673c39b0921503199a0ad

Patch

Details

CVE ID CVE-2024-56721

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2024-12-29

Modified 2025-10-01

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-56721?

CVE-2024-56721 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . It affects Linux kernel versions from 6.10 onward and has been patched in 6.11.11, 6.12.2 and 6.13. CVE-2024-56721 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-56721?

CVE-2024-56721 has a CVSS score of 7.1 out of 10, rated High 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:H.
Is there a patch available for CVE-2024-56721?

Yes. CVE-2024-56721 has been patched. Fixed versions include 6.11.11, 6.12.2 and 6.13. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-56721 actively exploited?

No. CVE-2024-56721 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.