CVE-2026-81018: platform/x86: think-lmi: Free system certificate signatures

Severity: unknown
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: 2026-09-11 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: platform/x86: think-lmi: Free system certificate signatures Multi-certificate support also allows the system authentication object to store ->signature and ->save_signature, which leak when the driver is removed. Free the signatures to avoid leaking memory.

Affected products

Linux kernel: 6.13 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

https://git.kernel.org/stable/c/9c28adde051fe76a7754856d0a414ab89adcaa4d
https://git.kernel.org/stable/c/abbcc0354108cf47a6055b951182bf73520d0363
https://git.kernel.org/stable/c/abca989604f60fe29d7170431f819e28ec7d868a

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