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

What is CVE-2025-71148?

CVE-2025-71148 is a low-severity memory corruption vulnerability in Linux kernel, published on 23 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Which versions are affected by CVE-2025-71148?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-71148?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-71148 being exploited?

There is no known exploitation of CVE-2025-71148 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-75150, BELL-CVE-2025-71148, DEBIAN-CVE-2025-71148, GHSA-c3vj-7cm3-p3xg, ROOT-OS-UBUNTU-2404-CVE-2025-71148, UBUNTU-CVE-2025-71148.