SB20261029160 - Use-after-free in Linux kernel scsi driver
Published: October 29, 2026
Security Bulletin ID
SB20261029160
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-99156)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service through kernel memory corruption.
The vulnerability exists due to a use-after-free race in the Linux kernel SCSI tape driver when opening a tape device concurrently with its removal. A local user can open the device during removal to cause st_open() to access a freed scsi_tape structure through st_index_idr, potentially crashing the kernel.
Remediation
Install update from vendor's website.