CVE-2021-47356
Published: May 21, 2024
Modified: May 11, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible use-after-free in HFC_cleanup() This module's remove path calls del_timer(). However, that function does not wait until the timer handler finishes. This means that the timer handler may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling del_timer_sync(), which makes sure the timer handler has finished, and unable to re-schedule itself.
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 - < 49331c07ef0f8fdfa42b30ba6a83a657b29d7fbeaffected 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 - < 54ff3202928952a100c477248e65ac6db01258a7affected 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 - < 7867ddc5f3de7f289aee63233afc0df4b62834c5affected 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 - < 5f2818185da0fe82a932f0856633038b66faf124affected 87c5fa1bb42624254a2013cbbc3b170d6017f5d6 - < 3ecd228c636ee17c14662729737fa07242a93cb0+4 more versions |
Linux | Linux | affected 2.6.29unaffected 0 - < 2.6.29unaffected 4.4.276 - <= 4.4.*unaffected 4.9.276 - <= 4.9.*unaffected 4.14.240 - <= 4.14.*+6 more versions |
References
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