Description (CNA)
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)
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb before 468ff4a7c61fb811c596a7c44b6a5455e40fd12b; affected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb before a68768e280b7d0c967ea509e791bb9b90adc94a5; affected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb before c548f95688e2b5ae0e2ae43d53cf717156c7d034; affected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb before 374e4cd75617c8c2552f562f39dd989583f5c330; affected 070b3656cf228eaaef7b28b59264c5c7cdbdd0fb before d0259a856afca31d699b706ed5e2adf11086c73b |
| Linux / Linux | affected 4.1; unaffected 0 before 4.1; unaffected 6.1.136 through 6.1.*; unaffected 6.6.89 through 6.6.*; unaffected 6.12.26 through 6.12.*; unaffected 6.14.5 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
References
- 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/374e4cd75617c8c2552f562f39dd989583f5c330
- https://git.kernel.org/stable/c/d0259a856afca31d699b706ed5e2adf11086c73b
ADP enrichment
No English description supplied.