SB20260529171 - Out-of-bounds read in Linux kernel md driver

Description

This security bulletin contains information about 1 vulnerability.

1) Out-of-bounds read (CVE-ID: CVE-2026-46130)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 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/E:U/U:Clear

The vulnerability allows a local user to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in fec_decode_bufs() in dm-verity-fec when decoding parity bytes split across parity blocks. A local user can trigger the vulnerable code path to disclose sensitive information.

The issue occurs only for certain non-default fec_roots values and when the maximum number of buffers cannot be allocated due to low-memory conditions.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/3d1b4e2d8ac0a1a1390a117f61ce0ca1c47e3bcb
• https://git.kernel.org/stable/c/430a05cb926f6bdf53e81460a2c3a553257f3f61