CVE-2026-74570 ntfs: harden runlist realloc size calculations
An integer overflow in the Linux kernel NTFS driver could allow attackers to execute arbitrary code or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74570?
CVE-2026-74570 is a critical vulnerability in Linux, published on 15 Aug 2026. 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:
ntfs: harden runlist realloc size calculations
Add a shared helper to safely convert runlist element counts to byte sizes using overflow checks, and use it in both ntfs_rl_realloc() and ntfs_rl_realloc_nofail().
Which versions are affected by CVE-2026-74570?
How do I fix CVE-2026-74570?
Apply the vendor's patch.
Is CVE-2026-74570 being exploited?
There is no known exploitation of CVE-2026-74570 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-74570, GHSA-jmrc-p9j9-g3vw, UBUNTU-CVE-2026-74570.