Vulnerability details
CVE-2025-40198
Linux Linux
ext4: avoid potential buffer over-read in parse_apply_sb_mount_options()
CVSS 3.1
7.8High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 2.6.36 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < b2bac84fde28fb6a88817b8b761abda17a1d300b | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < e651294218d2684302ee5ed95ccf381646f3e5b4 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < 01829af7656b56d83682b3491265d583d502e502 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < 7bf46ff83a0ef11836e38ebd72cdc5107209342d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < a6e94557cd05adc82fae0400f6e17745563e5412 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < 8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 8b67f04ab9de5d8f3a71aef72bf02c995a506db5 ≤ v < 2a0cf438320cdb783e0378570744c0ef0d83e934 | CVEProject cvelistV5 (CNA) |
References and advisories
7- https://git.kernel.org/stable/c/7bf46ff83a0ef11836e38ebd72cdc5107209342d
- https://git.kernel.org/stable/c/b2bac84fde28fb6a88817b8b761abda17a1d300b
- https://git.kernel.org/stable/c/e651294218d2684302ee5ed95ccf381646f3e5b4
- https://git.kernel.org/stable/c/01829af7656b56d83682b3491265d583d502e502
- https://git.kernel.org/stable/c/2a0cf438320cdb783e0378570744c0ef0d83e934
- https://git.kernel.org/stable/c/a6e94557cd05adc82fae0400f6e17745563e5412
- https://git.kernel.org/stable/c/8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8
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Details
- Published
- 2025-11-13
- Last updated
- 2026-10-16
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.16%
Probability of exploitation in 30 days
5.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- —