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CVE-2025-37879 Detail

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)


Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

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Hyperlink Resource
https://git.kernel.org/stable/c/374e4cd75617c8c2552f562f39dd989583f5c330
https://git.kernel.org/stable/c/468ff4a7c61fb811c596a7c44b6a5455e40fd12b
https://git.kernel.org/stable/c/a68768e280b7d0c967ea509e791bb9b90adc94a5
https://git.kernel.org/stable/c/c548f95688e2b5ae0e2ae43d53cf717156c7d034
https://git.kernel.org/stable/c/d0259a856afca31d699b706ed5e2adf11086c73b

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-37879
NVD Published Date:
05/09/2025
NVD Last Modified:
05/12/2025
Source:
kernel.org