CVE-2025-37879
Published: May 9, 2025
Modified: May 11, 2026
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)
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb - < 468ff4a7c61fb811c596a7c44b6a5455e40fd12baffected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb - < a68768e280b7d0c967ea509e791bb9b90adc94a5affected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb - < c548f95688e2b5ae0e2ae43d53cf717156c7d034affected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb - < 374e4cd75617c8c2552f562f39dd989583f5c330affected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb - < d0259a856afca31d699b706ed5e2adf11086c73b |
Linux | Linux | affected 4.1unaffected 0 - < 4.1unaffected 6.1.136 - <= 6.1.*unaffected 6.6.89 - <= 6.6.*unaffected 6.12.26 - <= 6.12.*+2 more versions |
References
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