CVE-2024-53168

Kernel memory corruption via stale network namespace reference

Published Dec 27, 2024 · Updated Aug 5, 2026

Use-after-free in Linux kernel SUNRPC TCP handling allows local users to corrupt kernel memory through network namespace teardown. xs_destroy closes the TCP socket without retaining its network-namespace reference, allowing an armed retransmission timer to dereference the freed struct net after cleanup_net runs. Exploitation requires low-privileged local control of namespace creation, SUNRPC transport setup, FIN suppression, and namespace deletion, and allows privilege escalation or a host panic.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel SUNRPC TCP handling allows local users to corrupt kernel memory through network namespace teardown. xs_destroy closes the TCP socket without retaining its network-namespace reference, allowing an armed retransmission timer to dereference the freed struct net after cleanup_net runs. Exploitation requires low-privileged local control of namespace creation, SUNRPC transport setup, FIN suppression, and namespace deletion, and allows privilege escalation or a host panic.

The record

CVE
CVE-2024-53168
Published
Dec 27, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 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

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Is a vulnerable build present?

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

  1. Affected versionversion=26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe <0ca87e5063757132a044d35baba40a7d4bb25394
  2. Affected versionversion=26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe <3f23f96528e8fcf8619895c4c916c52653892ec1
  3. Affected versionversion=26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe <61c0a5eac96836de5e3a5897eccdc63162a94936
  4. Affected versionversion=26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe <694ccb05b79ee5f5a9f14c2f80d2635d3bb8bdc3
  5. Affected versionversion=4.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe <0ca87e5063757132a044d35baba40a7d4bb25394; version=26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe <3f23f96528e8fcf8619895c4c916c52653892ec1; version=26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe <61c0a5eac96836de5e3a5897eccdc63162a94936; version=26abe14379f8e2fa3fd1bcf97c9a7ad9364886fe <694ccb05b79ee5f5a9f14c2f80d2635d3bb8bdc3; version=4.2

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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