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Linux Kernel CVE-2025-40291

| EUVDEUVD-2025-201653
2025-12-08 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Lifecycle Timeline

4
Patch available
Apr 16, 2026 - 05:29 EUVD
826ce37a842633efe1bb763e4b13045d74060d72,146eb58629f45f8297e83d69e64d4eea4b28d972
EUVD ID Assigned
Mar 15, 2026 - 17:54 euvd
EUVD-2025-201653
Analysis Generated
Mar 15, 2026 - 17:54 vuln.today
CVE Published
Dec 08, 2025 - 01:16 nvd
N/A

DescriptionCVE.org

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.

Analysis

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.

RemediationAI

Monitor vendor advisories for patches. Apply mitigations such as network segmentation, access restrictions, and monitoring.

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CVE-2025-40291 vulnerability details – vuln.today

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