CVE-2025-23138

Published Apr 16, 2025

Last updated 6 months ago

CVSS medium 5.5

Overview

Description
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()?)
Source
416baaa9-dc9f-4396-8d5f-8c081fb06d67
NVD status
Analyzed
Products
linux_kernel, debian_linux

Risk scores

CVSS 3.1

Type
Primary
Base score
5.5
Impact score
3.6
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Severity
MEDIUM

Weaknesses

nvd@nist.gov
NVD-CWE-noinfo

Social media

Hype score
Not currently trending

  1. Linux Kernelの脆弱性(CVE-2025-22018〜CVE-2025-23138) #security #vulnerability #セキュリティ #脆弱性 #linux #kernel https://t.co/YM6EVCF4kb

    @omokazuki

    20 Apr 2025

    99 Impressions

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  2. CVE-2025-23138 In the Linux kernel, the following vulnerability has been resolved: watch_queue https://t.co/OCehkUIf0p

    @VulmonFeeds

    16 Apr 2025

    63 Impressions

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    1 Like

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Configurations

Related CVEs

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References

Sources include official advisories and independent security research.