CVE-2025-37879 (GCVE-0-2025-37879)

Vulnerability from cvelistv5 – Published: 2025-05-09 06:45 – Updated: 2026-01-02 15:29
VLAI?
Title
9p/net: fix improper handling of bogus negative read/write replies
Summary
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 ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb , < 468ff4a7c61fb811c596a7c44b6a5455e40fd12b (git)
Affected: 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb , < a68768e280b7d0c967ea509e791bb9b90adc94a5 (git)
Affected: 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb , < c548f95688e2b5ae0e2ae43d53cf717156c7d034 (git)
Affected: 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb , < 374e4cd75617c8c2552f562f39dd989583f5c330 (git)
Affected: 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb , < d0259a856afca31d699b706ed5e2adf11086c73b (git)
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    Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 6.1.136 , ≤ 6.1.* (semver)
Unaffected: 6.6.89 , ≤ 6.6.* (semver)
Unaffected: 6.12.26 , ≤ 6.12.* (semver)
Unaffected: 6.14.5 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)
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