CVE-2025-40198
High
Description
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.
SeverityHigh
CVSS7.8
Exploit probability—
Product
Linux
PublishedNov 12, 2025
First seenNov 12, 2025
How to fix
Update
- Linux Linux7bf46ff83a0ef11836e38ebd72cdc5107209342d, b2bac84fde28fb6a88817b8b761abda17a1d300b, e651294218d2684302ee5ed95ccf381646f3e5b4, 01829af7656b56d83682b3491265d583d502e502, 2a0cf438320cdb783e0378570744c0ef0d83e934, a6e94557cd05adc82fae0400f6e17745563e5412, 8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < 7bf46ff83a0ef11836e38ebd72cdc5107209342d, 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < b2bac84fde28fb6a88817b8b761abda17a1d300b, 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < e651294218d2684302ee5ed95ccf381646f3e5b4, 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < 01829af7656b56d83682b3491265d583d502e502, 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < 2a0cf438320cdb783e0378570744c0ef0d83e934, 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < a6e94557cd05adc82fae0400f6e17745563e5412, 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < 8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8, 2.6.36 | 7bf46ff83a0ef11836e38ebd72cdc5107209342d, b2bac84fde28fb6a88817b8b761abda17a1d300b, e651294218d2684302ee5ed95ccf381646f3e5b4, 01829af7656b56d83682b3491265d583d502e502, 2a0cf438320cdb783e0378570744c0ef0d83e934, a6e94557cd05adc82fae0400f6e17745563e5412, 8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8 |
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