CVE-2025-39822 (GCVE-0-2025-39822)

Vulnerability from cvelistv5 – Published: 2025-09-16 13:00 – Updated: 2026-01-21 06:54
VLAI?
Title
io_uring/kbuf: fix signedness in this_len calculation
Summary
In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: fix signedness in this_len calculation When importing and using buffers, buf->len is considered unsigned. However, buf->len is converted to signed int when committing. This can lead to unexpected behavior if the buffer is large enough to be interpreted as a negative value. Make min_t calculation unsigned.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: cf9536e550dd243a1681fdbf804221527da20a80 , < f4f411c068402c370c4f9a9d4950a97af97bbbb1 (git)
Affected: cf9536e550dd243a1681fdbf804221527da20a80 , < c64eff368ac676e8540344d27a3de47e0ad90d21 (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.16.5 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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