CVE-2026-90010 scsi: bsg: Cap io_uring sense copy to max_response_len
A buffer overflow in the Linux kernel SCSI block layer allows attackers to corrupt memory, potentially leading to code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-90010?
CVE-2026-90010 is a high-severity memory corruption vulnerability in Linux, published on 16 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: bsg: Cap io_uring sense copy to max_response_len
Completion copied scmd->sense_len to the user response buffer without honoring max_response_len. After a valid sense, the midlayer sets sense_len to the real length (up to SCSI_SENSE_BUFFERSIZE), so a smaller user buffer was overrun.
Which versions are affected by CVE-2026-90010?
How do I fix CVE-2026-90010?
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-2026-90010 being exploited?
There is no known exploitation of CVE-2026-90010 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-90010, GHSA-jqrf-j7h5-x2p4, UBUNTU-CVE-2026-90010.