CVE-2024-36971Known exploitation

Code execution via route-cache use-after-free

Published Jun 10, 2024 · Updated Aug 5, 2026

Use-after-free in the Linux kernel allows local users to execute code through a race during UDP route-cache invalidation. __dst_negative_advice() releases the cached destination before clearing sk_dst_cache, violating RCU ordering and permitting concurrent UDP activity to retain a freed object. Triggering requires local low-privileged access and concurrent socket activity; successful exploitation can compromise the kernel.

CVSS severity7.8
High
EPSS probability2.70%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel allows local users to execute code through a race during UDP route-cache invalidation. __dst_negative_advice() releases the cached destination before clearing sk_dst_cache, violating RCU ordering and permitting concurrent UDP activity to retain a freed object. Triggering requires local low-privileged access and concurrent socket activity; successful exploitation can compromise the kernel.

The record

CVE
CVE-2024-36971
Published
Jun 10, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Jun 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.6
  2. Affected versionversion=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <051c0bde9f0450a2ec3d62a86d2a0d2fad117f13
  3. Affected versionversion=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <2295a7ef5c8c49241bff769e7826ef2582e532a6
  4. Affected versionversion=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <5af198c387128a9d2ddd620b0f0803564a4d4508
  5. Affected versionversion=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <81dd3c82a456b0015461754be7cb2693991421b4
  6. Affected versionversion=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <92f1655aa2b2294d0b49925f3b875a634bd3b59e
  7. Affected versionversion=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <b8af8e6118a6605f0e495a58d591ca94a85a50fc
  8. Affected versionversion=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <db0082825037794c5dba9959c9de13ca34cc5e72
  9. Affected versionversion=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <eacb8b195579c174a6d3e12a9690b206eb7f28cf

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <051c0bde9f0450a2ec3d62a86d2a0d2fad117f13; version=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <2295a7ef5c8c49241bff769e7826ef2582e532a6; version=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <5af198c387128a9d2ddd620b0f0803564a4d4508; version=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <81dd3c82a456b0015461754be7cb2693991421b4; version=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <92f1655aa2b2294d0b49925f3b875a634bd3b59e; version=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <b8af8e6118a6605f0e495a58d591ca94a85a50fc; version=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <db0082825037794c5dba9959c9de13ca34cc5e72; version=a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 <eacb8b195579c174a6d3e12a9690b206eb7f28cf
The Linux Kernel Organization · Linux Kernelversion=4.6; version=a87cb3e48ee8 <051c0bde9f04; version=a87cb3e48ee8 <2295a7ef5c8c; version=a87cb3e48ee8 <5af198c38712; version=a87cb3e48ee8 <81dd3c82a456; version=a87cb3e48ee8 <92f1655aa2b2; version=a87cb3e48ee8 <b8af8e6118a6; version=a87cb3e48ee8 <db0082825037; version=a87cb3e48ee8 <eacb8b195579

Published CVSS scores

7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Reported exploitation

Technologies

Your stack

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Your stack

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