CVSS 3.1
7.1 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:HCVE-2025-37879
High (7.1). EPSS 0.7% chance of exploitation in the next 30 days.
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)
Severity
- EPSS
- 0.7% chance of exploitation in the next 30 days; higher than 53% of CVEs (scores of 2026-10-31)
- CWE
- CWE-125
- Published
- Modified
- Record from
- the NVD, synced
Affected
- debian:debian_linux
- linux:linux_kernel
References
- 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