CVE-2026-74592 ima: Instantiate file_truncate and path_truncate hooks
Missing IMA hook instantiation allows files to bypass re-measurement after truncation, potentially hiding unauthorized modifications from integrity checks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74592?
CVE-2026-74592 is a high-severity vulnerability in Linux, published on 22 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ima: Instantiate file_truncate and path_truncate hooks
Instantiate the file_truncate and path_truncate LSM hooks to reset the action cache flags (IMA_DONE_MASK) as soon as truncation is requested, so the file, based on policy, is re-collected, re-measured, re-audited, and re-appraised on next access.
Which versions are affected by CVE-2026-74592?
How do I fix CVE-2026-74592?
Apply the vendor's patch.
Is CVE-2026-74592 being exploited?
There is no known exploitation of CVE-2026-74592 in the wild and no public exploit code.
Sources
Also known as AZL-97362, BELL-CVE-2026-74592, DEBIAN-CVE-2026-74592, GHSA-hgmq-24pq-jx89, UBUNTU-CVE-2026-74592.