CVE-2025-40198
ext4: avoid potential buffer over-read in parse_apply_sb_mount_options()
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
12 Nov 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/01829af7656b56d83682b3491265d583d502e502https://git.kernel.org/stable/c/2a0cf438320cdb783e0378570744c0ef0d83e934https://git.kernel.org/stable/c/7bf46ff83a0ef11836e38ebd72cdc5107209342dhttps://git.kernel.org/stable/c/8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8https://git.kernel.org/stable/c/a6e94557cd05adc82fae0400f6e17745563e5412https://git.kernel.org/stable/c/b2bac84fde28fb6a88817b8b761abda17a1d300bhttps://git.kernel.org/stable/c/e651294218d2684302ee5ed95ccf381646f3e5b4