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VulnerabilityPublished Updated

CVE-2024-53124: Linux kernel · net: fix data-races around sk->sk_forward_alloc

Affects Linux kernelSource GCVE Database

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Not known to be exploited · CVSS 7.5 High.

Data as of 10 Nov 2026, 14:17 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (Linux)CVSS 3.17.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Dec 2024

  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 10 Nov 2026.

What to do

AI-suggested

A fix for this vulnerability is available in the Linux kernel. Users should update to a patched kernel version that includes the fix for CVE-2024-53124. Until patched, avoid running untrusted workloads that could trigger concurrent tcp_v6_do_rcv() or dccp_v6_do_rcv() calls on TCP_LISTEN sockets. Monitor vendor advisories for specific fixed kernel versions.

Description

CVE-2024-53124 is a data race vulnerability in the Linux kernel's networking code involving the sk->sk_forward_alloc field. It occurs when two threads concurrently call tcp_v6_do_rcv() or dccp_v6_do_rcv() with the socket in TCP_LISTEN state and sk_lock unlocked, leading to inconsistent memory accounting. This flaw can cause a negative sk_forward_alloc value, potentially destabilizing kernel memory management and causing a denial of service. The issue was reported by Syzkaller and fixed by preventing skb_clone_and_charge_r() calls in tcp_v6_do_rcv() and dccp_v6_do_rcv() when the socket is in TCP_LISTEN state.

References

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