Bug 2395774 (CVE-2025-39822) - CVE-2025-39822 kernel: io_uring/kbuf: fix signedness in this_len calculation
Summary: CVE-2025-39822 kernel: io_uring/kbuf: fix signedness in this_len calculation
Keywords:
Status: NEW
Alias: CVE-2025-39822
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-09-16 14:01 UTC by OSIDB Bzimport
Modified: 2025-09-16 16:18 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2025-09-16 14:01:33 UTC
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.


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