CVE-2024-53124: Linux kernel · net: fix data-races around sk->sk_forward_alloc
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 7.5 High.
Data as of 10 Nov 2026, 14:17 UTC
Thin evidence
One scorer or none| CNA (Linux) | CVSS 3.1 | 7.5 |
|---|
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 2 Dec 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
- git.kernel.org/stable/c/695fb0b9aecfd5dd5b2946ba8897ac2c1eef654d (opens in a new tab)
- git.kernel.org/stable/c/fe2c0bd6d1e29ccefdc978b9a290571c93c27473 (opens in a new tab)
- git.kernel.org/stable/c/c3d052cae566ec2285f5999958a5deb415a0f59e (opens in a new tab)
- git.kernel.org/stable/c/be7c61ea5f816168c38955eb4e898adc8b4b32fd (opens in a new tab)
- git.kernel.org/stable/c/3f51f8c9d28954cf380100883a02eed35a8277e9 (opens in a new tab)
- git.kernel.org/stable/c/d285eb9d0641c8344f2836081b4ccb7b3c5cc1b6 (opens in a new tab)
- git.kernel.org/stable/c/073d89808c065ac4c672c0a613a71b27a80691cb (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/03/msg00001.html (opens in a new tab)
- lists.debian.org/debian-lts-announce/2025/03/msg00002.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-398330.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-265688.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-503939.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)