Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: libceph: fix race between delayed_work() and ceph_monc_stop() The way the delayed work is handled in ceph_monc_stop() is prone to races with mon_fault() and possibly also finish_hunting(). Both of these can requeue the delayed work which wouldn't be canceled by any of the following code in case that happens after cancel_delayed_work_sync() runs -- __close_session() doesn't mess with the delayed work in order to avoid interfering with the hunting interval logic. This part was missed in commit b5d91704f53e ("libceph: behave in mon_fault() if cur_mon < 0") and use-after-free can still ensue on monc and objects that hang off of it, with monc->auth and monc->monmap being particularly susceptible to quickly being reused. To fix this: - clear monc->cur_mon and monc->hunting as part of closing the session in ceph_monc_stop() - bail from delayed_work() if monc->cur_mon is cleared, similar to how it's done in mon_fault() and finish_hunting() (based on monc->hunting) - call cancel_delayed_work_sync() after the session is closed
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 0e04dc26cc594d31ee6b1382b452b6bc83b57937 before 1177afeca833174ba83504688eec898c6214f4bf; affected 0e04dc26cc594d31ee6b1382b452b6bc83b57937 before 63e5d035e3a7ab7412a008f202633c5e6a0a28ea; affected 0e04dc26cc594d31ee6b1382b452b6bc83b57937 before 34b76d1922e41da1fa73d43b764cddd82ac9733c; affected 0e04dc26cc594d31ee6b1382b452b6bc83b57937 before 20cf67dcb7db842f941eff1af6ee5e9dc41796d7; affected 0e04dc26cc594d31ee6b1382b452b6bc83b57937 before 2d33654d40a05afd91ab24c9a73ab512a0670a9a; affected 0e04dc26cc594d31ee6b1382b452b6bc83b57937 before 9525af1f58f67df387768770fcf6d6a8f23aee3d; affected 0e04dc26cc594d31ee6b1382b452b6bc83b57937 before 33d38c5da17f8db2d80e811b7829d2822c10625e; affected 0e04dc26cc594d31ee6b1382b452b6bc83b57937 before 69c7b2fe4c9cc1d3b1186d1c5606627ecf0de883 |
| Linux / Linux | affected 4.6; unaffected 0 before 4.6; unaffected 4.19.318 through 4.19.*; unaffected 5.4.280 through 5.4.*; unaffected 5.10.222 through 5.10.*; unaffected 5.15.163 through 5.15.*; unaffected 6.1.100 through 6.1.*; unaffected 6.6.41 through 6.6.*; unaffected 6.9.10 through 6.9.*; unaffected 6.10 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/1177afeca833174ba83504688eec898c6214f4bf
- https://git.kernel.org/stable/c/63e5d035e3a7ab7412a008f202633c5e6a0a28ea
- https://git.kernel.org/stable/c/34b76d1922e41da1fa73d43b764cddd82ac9733c
- https://git.kernel.org/stable/c/20cf67dcb7db842f941eff1af6ee5e9dc41796d7
- https://git.kernel.org/stable/c/2d33654d40a05afd91ab24c9a73ab512a0670a9a
- https://git.kernel.org/stable/c/9525af1f58f67df387768770fcf6d6a8f23aee3d
- https://git.kernel.org/stable/c/33d38c5da17f8db2d80e811b7829d2822c10625e
- https://git.kernel.org/stable/c/69c7b2fe4c9cc1d3b1186d1c5606627ecf0de883
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.