Use of uninitialized resource in Linux kernel - CVE-2026-89515
Published: September 12, 2026
Vulnerability identifier: #VU149283
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-89515
CWE-ID: CWE-908
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to disclose uninitialized memory contents.
The vulnerability exists due to use of uninitialized memory in scsi_alloc_sgtables() when processing the last unaligned element of a scatterlist requiring DMA padding. A local user can issue an SCSI generic I/O request with an unaligned final scatterlist element to disclose uninitialized memory contents.
Affected software
Linux kernel
How to mitigate CVE-2026-89515
Install security update from vendor's repository.