CVE-2024-36031: keys: Fix overwrite of key expiration on instantiation

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-30 · updated 2026-06-17
Weakness: CWE-324

Description

In the Linux kernel, the following vulnerability has been resolved: keys: Fix overwrite of key expiration on instantiation The expiry time of a key is unconditionally overwritten during instantiation, defaulting to turn it permanent. This causes a problem for DNS resolution as the expiration set by user-space is overwritten to TIME64_MAX, disabling further DNS updates. Fix this by restoring the condition that key_set_expiry is only called when the pre-parser sets a specific expiry.

Affected products

Linux kernel: from 5.10.206 before 5.10.217; from 5.15.146 before 5.15.159; from 6.1.70 before 6.1.91; from 6.6.9 before 6.6.31; from 6.7 before 6.8.10; from 6.9 before 6.9.1 — fixed in 5.10.217, 5.15.159, 6.1.91, 6.6.31, 6.8.10, 6.9.1

How to fix

Upgrade to a fixed version: Linux kernel 5.10.217, 5.15.159, 6.1.91, 6.6.31. Check the vendor advisory for mitigations.

References

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