CVE-2026-92477 scsi: ufs: debugfs: Reserve space for a string terminator
A local attacker with high privileges can trigger a buffer overflow in the UFS debugfs interface, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-92477?
CVE-2026-92477 is a memory corruption vulnerability in Linux, published on 17 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
scsi: ufs: debugfs: Reserve space for a string terminator
ufs_saved_err_write() copies user input into a zero-initialized stack buffer and passes it to kstrtoint(). A write that fills the entire buffer overwrites its only terminator.
Reject an input whose length leaves no room for the trailing NUL.
Which versions are affected by CVE-2026-92477?
How do I fix CVE-2026-92477?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-92477 being exploited?
There is no known exploitation of CVE-2026-92477 in the wild and no public exploit code.
Sources
Also known as AZL-101867, BELL-CVE-2026-92477, DEBIAN-CVE-2026-92477, GHSA-v35x-qr5h-m345, UBUNTU-CVE-2026-92477.