CVE-2025-22110 netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error

What is CVE-2025-22110?

CVE-2025-22110 is a critical vulnerability in Linux kernel, published on 16 Apr 2025. 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:

netfilter: nfnetlink_queue: Initialize ctx to avoid memory allocation error

It is possible that ctx in nfqnl_build_packet_message() could be used before it is properly initialize, which is only initialized by nfqnl_get_sk_secctx().

This patch corrects this problem by initializing the lsmctx to a safe value when it is declared.

This is similar to the commit 35fcac7a7c25 ("audit: Initialize lsmctx to avoid memory allocation error").

Weakness: CWE-908

Which versions are affected by CVE-2025-22110?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-22110?

Apply the vendor's patch.

Is CVE-2025-22110 being exploited?

There is no known exploitation of CVE-2025-22110 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-2025-22110, GHSA-96f3-qv87-v4w6, ROOT-OS-DEBIAN-13-CVE-2025-22110, UBUNTU-CVE-2025-22110.