CVE-2024-26679

Service interruption via unlocked socket-family reads

Published Apr 2, 2024 · Updated May 23, 2026

Race condition in the inet_recv_error() path in the Linux kernel allows local users to interrupt service through an IPv6 socket. The unlocked path reads sk->sk_family twice, so IPV6_ADDRFORM can change the socket to IPv4 between reads and select an inconsistent protocol-family handler. Exploitation requires low-privileged local access and a concurrent socket-family mutation; the published trigger produces a KCSAN race warning.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the inet_recv_error() path in the Linux kernel allows local users to interrupt service through an IPv6 socket. The unlocked path reads sk->sk_family twice, so IPV6_ADDRFORM can change the socket to IPv4 between reads and select an inconsistent protocol-family handler. Exploitation requires low-privileged local access and a concurrent socket-family mutation; the published trigger produces a KCSAN race warning.

The record

CVE
CVE-2024-26679
Published
Apr 2, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=3.17.7 <3.18
  2. Affected versionversion=3.18
  3. Affected versionversion=433337f9c00cac447d020922f59237273f5d92be
  4. Affected versionversion=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <307fa8a75ab7423fa5c73573ec3d192de5027830
  5. Affected versionversion=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <3266e638ba5cc1165f5e6989eb8c0720f1cc4b41
  6. Affected versionversion=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <4a5e31bdd3c1702b520506d9cf8c41085f75c7f2
  7. Affected versionversion=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <54538752216bf89ee88d47ad07802063a498c299
  8. Affected versionversion=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <5993f121fbc01dc2d734f0ff2628009b258fb1dd
  9. Affected versionversion=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <88081ba415224cf413101def4343d660f56d082b
  10. Affected versionversion=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <caa064c3c2394d03e289ebd6b0be5102eb8a5b40
  11. Affected versionversion=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <eef00a82c568944f113f2de738156ac591bbd5cd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.17.7 <3.18; version=3.18; version=433337f9c00cac447d020922f59237273f5d92be; version=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <307fa8a75ab7423fa5c73573ec3d192de5027830; version=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <3266e638ba5cc1165f5e6989eb8c0720f1cc4b41; version=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <4a5e31bdd3c1702b520506d9cf8c41085f75c7f2; version=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <54538752216bf89ee88d47ad07802063a498c299; version=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <5993f121fbc01dc2d734f0ff2628009b258fb1dd; version=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <88081ba415224cf413101def4343d660f56d082b; version=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <caa064c3c2394d03e289ebd6b0be5102eb8a5b40; version=f4713a3dfad045d46afcb9c2a7d0bba288920ed4 <eef00a82c568944f113f2de738156ac591bbd5cd

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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

CWE-667Improper Locking
T1499.004Application or System Exploitation

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.

Technologies

Your stack

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Your stack

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