Vulnerability details
CVE-2025-40291
Linux Linux
io_uring: fix regbuf vector size truncation
CVSS 3.1
7.8High
Official description
In the Linux kernel, the following vulnerability has been resolved: io_uring: fix regbuf vector size truncation There is a report of io_estimate_bvec_size() truncating the calculated number of segments that leads to corruption issues. Check it doesn't overflow "int"s used later. Rough but simple, can be improved on top.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.8High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 6.15 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 ≤ v < 826ce37a842633efe1bb763e4b13045d74060d72 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | 9ef4cbbcb4ac3786a1a4164507511b76b2a572c5 ≤ v < 146eb58629f45f8297e83d69e64d4eea4b28d972 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2025-12-08
- Last updated
- 2026-08-05
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.15%
Probability of exploitation in 30 days
4.6%
Percentile (among all CVEs)
Weaknesses (CWE)
- —