What is CVE-2024-36971?

CVE-2024-36971 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416), affecting Linux kernel versions from 4.6 onward and patched in 4.19.316, 5.4.278, 5.10.219 and others. CVE-2024-36971 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild.

What is the CVSS score for CVE-2024-36971?

CVE-2024-36971 has a CVSS score of 7.8 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:H/A:H.

Is there a patch available for CVE-2024-36971?

Yes, CVE-2024-36971 has been patched. Fixed versions include 4.19.316, 5.4.278, 5.10.219 and others. If you are running Linux kernel 4.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-36971 actively exploited?

Yes. CVE-2024-36971 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild with a CVSS score of 7.8 (High severity).

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2024-36971

High KEV — Actively Exploited

In the Linux kernel, the following vulnerability has been resolved: net: fix __dst_negative_advice() race __dst_negative_advice() does not enforce proper RCU rules when sk->dst_cache must be cleared, leading to possible UAF. RCU rules are that we must first clear sk->sk_dst_cache, then call dst_release(old_dst). Note that sk_dst_reset(sk) is implementing this protocol correctly, while __dst_negative_advice() uses the wrong order. Given that ip6_negative_advice() has special logic against RTF_CACHE, this means each of the three ->negative_advice() existing methods must perform the sk_dst_reset() themselves. Note the check against NULL dst is centralized in __dst_negative_advice(), there is no need to duplicate it in various callbacks. Many thanks to Clement Lecigne for tracking this issue. This old bug became visible after the blamed commit, using UDP sockets.

Package Linux Kernel

Published 2024-06-10

Last modified 2025-11-05

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-416

CVE-2024-36971 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

Affected versions

Linux kernel versions 4.6 and later are affected. Fixed in 4.19.316, 5.4.278, 5.10.219, 5.15.161, 6.1.94, 6.6.34, 6.9.4, 6.10 and their respective stable series.

Affected from

≥ 4.6

Fixed in

✓ 4.19.316 4.19.x ✓ 5.4.278 5.4.x ✓ 5.10.219 5.10.x ✓ 5.15.161 5.15.x ✓ 6.1.94 6.1.x ✓ 6.6.34 6.6.x ✓ 6.9.4 6.9.x ✓ 6.10

References

10 total

CISA
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-36971

US Government Resource
Kernel Git
https://git.kernel.org/stable/c/051c0bde9f0450a2ec3d62a86d2a0d2fad117f13

Patch
Kernel Git
https://git.kernel.org/stable/c/2295a7ef5c8c49241bff769e7826ef2582e532a6

Patch
Kernel Git
https://git.kernel.org/stable/c/5af198c387128a9d2ddd620b0f0803564a4d4508

Patch
Kernel Git
https://git.kernel.org/stable/c/81dd3c82a456b0015461754be7cb2693991421b4

Patch

Showing 5 of 10 references View all on NVD

Details

CVE ID CVE-2024-36971

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-06-10

Modified 2025-11-05

KEV Yes

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-36971?

CVE-2024-36971 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . It affects Linux kernel versions from 4.6 onward and has been patched in 4.19.316, 5.4.278, 5.10.219 and others. CVE-2024-36971 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild.
What is the CVSS score for CVE-2024-36971?

CVE-2024-36971 has a CVSS score of 7.8 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:H/A:H.
Is there a patch available for CVE-2024-36971?

Yes. CVE-2024-36971 has been patched. Fixed versions include 4.19.316, 5.4.278, 5.10.219 and others. If you are running Linux kernel 4.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-36971 actively exploited?

Yes. CVE-2024-36971 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. It carries a CVSS score of 7.8 (High severity).