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

What is CVE-2024-36031?

CVE-2024-36031 is a critical vulnerability in Linux kernel, published on 30 May 2024. 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:

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.

Weakness: CWE-324

Which versions are affected by CVE-2024-36031?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-36031?

Apply the vendor's patch.

Is CVE-2024-36031 being exploited?

There is no known exploitation of CVE-2024-36031 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
• How this page is made

Also known as BELL-CVE-2024-36031, DEBIAN-CVE-2024-36031, UBUNTU-CVE-2024-36031.