Out-of-bounds Read Affecting linux-virt package, versions <6.12.27-r0


Severity

Recommended
0.0
high
0
10

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Threat Intelligence

EPSS
0.01% (3rd percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LINUXVIRT-13961851
  • published14 Nov 2025
  • disclosed9 May 2025

Introduced: 9 May 2025

CVE-2025-37879  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Minimos:latest linux-virt to version 6.12.27-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-virt package and not the linux-virt package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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

9p/net: fix improper handling of bogus negative read/write replies

In p9_client_write() and p9_client_read_once(), if the server incorrectly replies with success but a negative write/read count then we would consider written (negative) <= rsize (positive) because both variables were signed.

Make variables unsigned to avoid this problem.

The reproducer linked below now fails with the following error instead of a null pointer deref: 9pnet: bogus RWRITE count (4294967295 > 3)

CVSS Base Scores

version 3.1