UBUNTU-CVE-2025-40291
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.
02 / AFFECTED SOFTWARE
Affected packages
11 explicit affected versions
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12 explicit affected versions
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10 explicit affected versions
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18 explicit affected versions
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13 explicit affected versions
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16 explicit affected versions
3 explicit affected versions
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26 explicit affected versions
45 explicit affected versions
37 explicit affected versions
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9 explicit affected versions
9 explicit affected versions
11 explicit affected versions
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4 explicit affected versions
1 explicit affected versions
13 explicit affected versions
43 explicit affected versions
6 explicit affected versions
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8 explicit affected versions
14 explicit affected versions
4 explicit affected versions
78 explicit affected versions
6 explicit affected versions
11 explicit affected versions
1 explicit affected versions
03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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.
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/146eb58629f45f8297e83d69e64d4eea4b28d972
- https://git.kernel.org/stable/c/146eb58629f45f8297e83d69e64d4eea4b28d972
- https://git.kernel.org/stable/c/826ce37a842633efe1bb763e4b13045d74060d72
- https://ubuntu.com/security/CVE-2025-40291
- https://ubuntu.com/security/notices/USN-8029-1
- https://ubuntu.com/security/notices/USN-8029-2
- https://ubuntu.com/security/notices/USN-8029-3
- https://ubuntu.com/security/notices/USN-8030-1
- https://ubuntu.com/security/notices/USN-8048-1
- https://www.cve.org/CVERecord?id=CVE-2025-40291