SB20260919164 - Heap-based buffer overflow in Linux kernel md driver
Published: September 19, 2026
Security Bulletin ID
SB20260919164
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Heap-based buffer overflow (CVE-ID: CVE-2026-90052)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to cause a heap-based buffer overflow.
The vulnerability exists due to a heap-based buffer overflow in the integrity_metadata function in drivers/md/dm-integrity.c when processing keyed discard operations with a tag size smaller than the digest size. A local privileged user can issue a keyed discard operation to cause a heap-based buffer overflow.
Remediation
Install update from vendor's website.