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
References
Configurations
Configuration 1 (hide)
|
History
08 Aug 2024, 15:02
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux
Linux linux Kernel |
|
| References | () https://git.kernel.org/stable/c/20cf67dcb7db842f941eff1af6ee5e9dc41796d7 - Patch | |
| References | () https://git.kernel.org/stable/c/1177afeca833174ba83504688eec898c6214f4bf - Patch | |
| References | () https://git.kernel.org/stable/c/33d38c5da17f8db2d80e811b7829d2822c10625e - Patch | |
| References | () https://git.kernel.org/stable/c/9525af1f58f67df387768770fcf6d6a8f23aee3d - Patch | |
| References | () https://git.kernel.org/stable/c/34b76d1922e41da1fa73d43b764cddd82ac9733c - Patch | |
| References | () https://git.kernel.org/stable/c/63e5d035e3a7ab7412a008f202633c5e6a0a28ea - Patch | |
| References | () https://git.kernel.org/stable/c/69c7b2fe4c9cc1d3b1186d1c5606627ecf0de883 - Patch | |
| References | () https://git.kernel.org/stable/c/2d33654d40a05afd91ab24c9a73ab512a0670a9a - Patch | |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| CWE | CWE-416 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
07 Aug 2024, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2024-08-07 16:15
Updated : 2024-08-08 15:02
NVD link : CVE-2024-42232
Mitre link : CVE-2024-42232
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-416
Use After Free