Use-after-free in Linux kernel - CVE-2026-99156
Published: October 29, 2026
Vulnerability identifier: #VU158437
CSH Severity: Low
CVSS v4: 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]
CVE-ID: CVE-2026-99156
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-99156
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.115-2
linux (Debian package) - update to 6.12.115-2