What’s Vulnerable › Vulnerabilities

CVE-2024-44996: vsock: fix recursive ->recvmsg calls

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-04 · updated 2026-06-17
• Weakness: CWE-674

Description

In the Linux kernel, the following vulnerability has been resolved: vsock: fix recursive ->recvmsg calls After a vsock socket has been added to a BPF sockmap, its prot->recvmsg has been replaced with vsock_bpf_recvmsg(). Thus the following recursiion could happen: vsock_bpf_recvmsg() -> __vsock_recvmsg() -> vsock_connectible_recvmsg() -> prot->recvmsg() -> vsock_bpf_recvmsg() again We need to fix it by calling the original ->recvmsg() without any BPF sockmap logic in __vsock_recvmsg().

Affected products

• Linux kernel: from 6.4 before 6.6.48; from 6.7 before 6.10.7; 6.11-rc1, 6.11-rc2, 6.11-rc3 — fixed in 6.10.7, 6.6.48

How to fix

Upgrade to a fixed version: Linux kernel 6.10.7, 6.6.48. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/69139d2919dd4aa9a553c8245e7c63e82613e3fc
• https://git.kernel.org/stable/c/921f1acf0c3cf6b1260ab57a8a6e8b3d5f3023d5
• https://git.kernel.org/stable/c/b4ee8cf1acc5018ed1369150d7bb3e0d0f79e135

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