linux: In __configfs_open_file of file.c, there is a possible use-after-free due to improper locking
CVE-2021-39656 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-39656, released December 15, 2021. It is not reported as exploited. Patch Radar priority: Routine.
In __configfs_open_file of file.c, there is a possible use-after-free due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-174049066References: Upstream kernel
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 12.15 (bookworm) | 5.10.24-1 | DEBIAN-CVE-2021-39656 | Dec 15, 2021 |
| linux · Debian 13.5 (trixie) | 5.10.24-1 | DEBIAN-CVE-2021-39656 | Dec 15, 2021 |
| linux · Debian 14 | 5.10.24-1 | DEBIAN-CVE-2021-39656 | Dec 15, 2021 |
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