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VulnerabilityPublished Updated

CVE-2024-57974: Linux kernel · udp: Deal with race between UDP socket address change and rehash

Affects Linux kernelSource GCVE Database

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Not known to be exploited.

Data as of 30 Oct 2026, 14:23 UTC

Severity
Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Feb 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

AI-suggested

Until a fix is available, users should be aware of potential transient UDP communication failures in affected kernel versions. No vendor advisory states that no action is required or that the issue is already mitigated.

Description

CVE-2024-57974 is a race condition vulnerability in the Linux kernel's UDP socket handling. It occurs when a UDP socket changes its local address during reception of datagrams via connect(), causing a temporary failure in socket lookup. This results in the socket being unreachable during the rehash operation, leading to connection refused errors and ICMP port unreachable messages. The issue was observed in scenarios involving socat UDP servers and clients, and in container networking tests. No CVSS score is provided.

References

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