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CVE WatchOct 19, 2026

CVE-2025-39822

In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: fix signedness in this_len calculation When importing a

CVSS

5.5

Medium

EPSS

0.1%

p3

KEV

—

Exploit Today

1

0-100

Published: Sep 16, 2025 · Last modified: Oct 19, 2026

EPSS · 30d
0.1%EPSS · 30 days0.1%
2026-09-282026-10-25
Technical description

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.

Official references
Related CVEs

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