SB20260528223 - Resource exhaustion in Linux kernel libata-scsi

Description

This security bulletin contains information about 1 vulnerability.

1) Resource exhaustion (CVE-ID: CVE-2026-45855)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource management in libata-scsi when issuing non-NCQ commands while NCQ commands are in flight on host adapters using multiple submission queues. A local user can issue non-NCQ commands under constant NCQ load to cause a denial of service.

The issue can result in very long delays or complete starvation of non-NCQ commands in the worst case.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/0ea84089dbf62a92dc7889c79e6b18fc89260808
• https://git.kernel.org/stable/c/5d61a38a60e62750526d94663b69b7ac5c7f07a5
• https://git.kernel.org/stable/c/888cd7e40adb2ef4af1b4d3b6e2e83ad409ae8c2
• https://git.kernel.org/stable/c/ce22aaed011206fed9cbd8c9c2d44718607f31ee