🛡️ CVE-2025-23138 — debian-linux

🟡 CVSS 5.5 — Medium ✅ No Known Exploit NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

watch_queue: fix pipe accounting mismatch

In the Linux kernel, the following vulnerability has been resolved:

watch_queue: fix pipe accounting mismatch

Currently, watch_queue_set_size() modifies the pipe buffers charged to

user->pipe_bufs without updating the pipe->nr_accounted on the pipe

itself, due to the if (!pipe_has_watch_queue()) test in

pipe_resize_ring(). This means that when the pipe is ultimately freed,

we decrement user->pipe_bufs by something other than what than we had

charged to it, potentially leading to an underflow. This in turn can

cause subsequent too_many_pipe_buffers_soft() tests to fail with -EPERM.

To remedy this, explicitly account for the pipe usage in

watch_queue_set_size() to match the number set via account_pipe_buffers()

(It's unclear why watch_queue_set_size() does not update nr_accounted;

it may be due to intentional overprovisioning in watch_queue_set_size()?)

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2025-23138 is recorded against 3 packages.

  • debian-linux
  • kernel (from 6.13.0 up to 6.14.2)
  • linux-kernel (from 6.14 up to 6.14.2)

Timeline and source

Published on 16 April 2025 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
git.kernel.org
lists.debian.org
lists.debian.org

CVE-2025-23138 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2025-04-16
Updated 2026-08-20
Modified 2026-06-17

Affected Packages

Software From version Fixed in
debian-linux — —
kernel 6.13.0 6.14.2
linux-kernel 6.14 6.14.2

References

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