CVE-2025-40198

In the Linux kernel, the following vulnerability has been resolved: ext4: avoid potential buffer over-read in parse_apply_sb_mount_options() Unlike other strings in the ext4 superblock, we rely on tune2fs to make sure s_mount_opts is NUL terminated. Harden parse_apply_sb_mount_options() by treating s_mount_opts as a potential __nonstring.

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-25)

Published

2025-11-12

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

References

• https://git.kernel.org/stable/c/01829af7656b56d83682b3491265d583d502e502
• https://git.kernel.org/stable/c/2a0cf438320cdb783e0378570744c0ef0d83e934
• https://git.kernel.org/stable/c/7bf46ff83a0ef11836e38ebd72cdc5107209342d
• https://git.kernel.org/stable/c/8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8
• https://git.kernel.org/stable/c/a6e94557cd05adc82fae0400f6e17745563e5412

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