CVE-2024-47743: KEYS: prevent NULL pointer dereference in find_asymmetric_key()

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: 2024-10-21 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: KEYS: prevent NULL pointer dereference in find_asymmetric_key() In find_asymmetric_key(), if all NULLs are passed in the id_{0,1,2} arguments, the kernel will first emit WARN but then have an oops because id_2 gets dereferenced anyway. Add the missing id_2 check and move WARN_ON() to the final else branch to avoid duplicate NULL checks. Found by Linux Verification Center (linuxtesting.org) with Svace static analysis tool.

Affected products

Linux kernel: from 5.17 before 6.1.113; from 6.2 before 6.6.54; from 6.7 before 6.10.13; from 6.11 before 6.11.2 — fixed in 6.1.113, 6.10.13, 6.11.2, 6.6.54

How to fix

Upgrade to a fixed version: Linux kernel 6.1.113, 6.10.13, 6.11.2, 6.6.54. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-47743 or the next vulnerability affects your stack