VULNERABILITY INTELLIGENCE

CVE-2025-37879

CVSS score7.1 HIGH
EPSS probability0.72%
CISA KEVNot currently listed
Published2025-05-09
Last modified2026-07-30
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Description

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)

Weakness classification

  • CWE-125: Out-of-bounds Read

Primary references