What’s Vulnerable › Vulnerabilities

CVE-2025-71148: net/handshake: restore destructor on submit failure

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-23 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: net/handshake: restore destructor on submit failure handshake_req_submit() replaces sk->sk_destruct but never restores it when submission fails before the request is hashed. handshake_sk_destruct() then returns early and the original destructor never runs, leaking the socket. Restore sk_destruct on the error path.

Affected products

• Linux kernel: from 6.4 before 6.6.120; from 6.7 before 6.12.64; from 6.13 before 6.18.3; 6.19-rc1 — fixed in 6.12.64, 6.18.3, 6.6.120

How to fix

Upgrade to a fixed version: Linux kernel 6.12.64, 6.18.3, 6.6.120. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6af2a01d65f89e73c1cbb9267f8880d83a88cee4
• https://git.kernel.org/stable/c/7b82a1d6ae869533d8bdb0282a3a78faed8e63dd
• https://git.kernel.org/stable/c/b225325be7b247c7268e65eea6090db1fc786d1f
• https://git.kernel.org/stable/c/cd8cf2be3717137554744233fda051ffc09d1d44

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