Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7915: fix use-after-free bugs in mt7915_mac_dump_work() When the mt7915 pci chip is detaching, the mt7915_crash_data is released in mt7915_coredump_unregister(). However, the work item dump_work may still be running or pending, leading to UAF bugs when the already freed crash_data is dereferenced again in mt7915_mac_dump_work(). The race condition can occur as follows: CPU 0 (removal path) | CPU 1 (workqueue) mt7915_pci_remove() | mt7915_sys_recovery_set() mt7915_unregister_device() | mt7915_reset() mt7915_coredump_unregister() | queue_work() vfree(dev->coredump.crash_data) | mt7915_mac_dump_work() | crash_data-> // UAF Fix this by ensuring dump_work is properly canceled before the crash_data is deallocated. Add cancel_work_sync() in mt7915_unregister_device() to synchronize with any pending or executing dump work.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4bf3f4755611e3ae4cca58469e3c1d73be9c8093 before 55159f1fa30bef03e01af469823c1de103a4a884; affected 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 before 6d5202409467d621b6d1dfd7fc7dadb997fe66d2; affected 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 before e6856af8a22a8e2cd18241a465ed00c2301b3a5e; affected 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 before 6b7cbb13c838cf2a5f2e7be0e96fe15250087939; affected 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 before 21ce6d867867645fff0ef657be18f61d9f39dcd8; affected 4dbcb9125cc3e10a6d879c10e4f5816d05a87c49 before 1146d0946b5358fad24812bd39d68f31cd40cc34 |
| Linux / Linux | affected 6.2; unaffected 0 before 6.2; 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/55159f1fa30bef03e01af469823c1de103a4a884
- https://git.kernel.org/stable/c/6d5202409467d621b6d1dfd7fc7dadb997fe66d2
- https://git.kernel.org/stable/c/e6856af8a22a8e2cd18241a465ed00c2301b3a5e
- https://git.kernel.org/stable/c/6b7cbb13c838cf2a5f2e7be0e96fe15250087939
- https://git.kernel.org/stable/c/21ce6d867867645fff0ef657be18f61d9f39dcd8
- https://git.kernel.org/stable/c/1146d0946b5358fad24812bd39d68f31cd40cc34