CVE-2026-72200 ntfs: detect mapping-pairs LCN accumulator overflow
A signed integer overflow in the Linux kernel NTFS parser allows attackers to corrupt runlists, potentially leading to unauthorized memory access or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-72200?
CVE-2026-72200 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: detect mapping-pairs LCN accumulator overflow
The NTFS mapping-pairs parser accumulates relative LCN deltas in a signed integer. A corrupted attribute can drive that addition past the representable range.
One corrupt runlist shape sets the accumulated LCN to S64_MAX and then adds a delta of 1 in the next mapping-pairs entry.
Signed overflow is undefined and can turn an invalid runlist into a different set of physical clusters.
Check the LCN addition for overflow before storing the next run.
Which versions are affected by CVE-2026-72200?
How do I fix CVE-2026-72200?
Apply the vendor's patch.
Is CVE-2026-72200 being exploited?
There is no known exploitation of CVE-2026-72200 in the wild and no public exploit code.
Sources
Also known as AZL-96534, BELL-CVE-2026-72200, DEBIAN-CVE-2026-72200, GHSA-j9wr-x478-q66c, UBUNTU-CVE-2026-72200.