CVE-2025-71131 crypto: seqiv - Do not use req->iv after crypto_aead_encrypt

What is CVE-2025-71131?

CVE-2025-71131 is a high-severity use after free vulnerability in Linux kernel, published on 14 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

crypto: seqiv - Do not use req->iv after crypto_aead_encrypt

As soon as crypto_aead_encrypt is called, the underlying request may be freed by an asynchronous completion. Thus dereferencing req->iv after it returns is invalid.

Instead of checking req->iv against info, create a new variable unaligned_info and use it for that purpose instead.

Weakness: CWE-416

Which versions are affected by CVE-2025-71131?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-71131?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2025-71131 being exploited?

There is no known exploitation of CVE-2025-71131 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 BELL-CVE-2025-71131, DEBIAN-CVE-2025-71131, GHSA-29vw-w4vv-p6rr, ROOT-OS-UBUNTU-2204-CVE-2025-71131, ROOT-OS-UBUNTU-2404-CVE-2025-71131, UBUNTU-CVE-2025-71131.