Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net/rds: reset op_nents when zerocopy page pin fails When iov_iter_get_pages2() fails in rds_message_zcopy_from_user(), the pinned pages are released with put_page(), and rm->data.op_mmp_znotifier is cleared. But we fail to properly clear rm->data.op_nents. Later when rds_message_purge() is called from rds_sendmsg() the cleanup loop iterates over the incorrectly non zero number of op_nents and frees them again. Fix this by properly resetting op_nents when it should be in rds_message_zcopy_from_user().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 before c6e51512a784c4a7b86e1a044988696e3b3721fa; affected 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 before 03014551938a0887fa55f18ce49b70158a9c0113; affected 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 before d84ce1786ce40fdd3dd98db47aec5527817e1ef6; affected 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 before 9115669faedccdda100428e2d26fd0aac8c50799; affected 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 before 0bbbff00a15b1df2cac9014d6cf4b6890f473353; affected 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 before 640e37f58f991546a87540d067279c2c1fa9fe51; affected 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 before 290e833d1acb1093bc121fcdc97f5e6161157479; affected 0cebaccef3acbdfbc2d85880a2efb765d2f4e2e3 before e174929793195e0cd6a4adb0cad731b39f9019b4 |
| Linux / Linux | affected 4.17; unaffected 0 before 4.17; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.141 through 6.6.*; unaffected 6.12.91 through 6.12.*; unaffected 6.18.33 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c6e51512a784c4a7b86e1a044988696e3b3721fa
- https://git.kernel.org/stable/c/03014551938a0887fa55f18ce49b70158a9c0113
- https://git.kernel.org/stable/c/d84ce1786ce40fdd3dd98db47aec5527817e1ef6
- https://git.kernel.org/stable/c/9115669faedccdda100428e2d26fd0aac8c50799
- https://git.kernel.org/stable/c/0bbbff00a15b1df2cac9014d6cf4b6890f473353
- https://git.kernel.org/stable/c/640e37f58f991546a87540d067279c2c1fa9fe51
- https://git.kernel.org/stable/c/290e833d1acb1093bc121fcdc97f5e6161157479
- https://git.kernel.org/stable/c/e174929793195e0cd6a4adb0cad731b39f9019b4
- https://github.com/v12-security/pocs/tree/main/pintheft
ADP enrichment
No English description supplied.
A flaw was found in the Linux kernel, specifically within the `net/rds` module. When a zerocopy page pin operation fails, a counter used for memory management (`op_nents`) is not correctly reset. This can result in a double-free vulnerability, where the same memory is released twice. A local attacker could potentially exploit this to cause the system to crash (denial of service) or, in some cases, execute unauthorized code.
No English description supplied.
No references supplied.