CVE-2021-46932: Input: appletouch - initialize work before device registration
First published: Tue Feb 27 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: Input: appletouch - initialize work before device registration Syzbot has reported warning in __flush_work(). This warning is caused by work->func == NULL, which means missing work initialization. This may happen, since input_dev->close() calls cancel_work_sync(&dev->work), but dev->work initalization happens _after_ input_register_device() call. So this patch moves dev->work initialization before registering input device
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | >=2.6.23<4.4.298 | |
| Linux Linux kernel | >=4.5.0<4.9.296 | |
| Linux Linux kernel | >=4.10.0<4.14.261 | |
| Linux Linux kernel | >=4.15.0<4.19.224 | |
| Linux Linux kernel | >=4.20.0<5.4.170 | |
| Linux Linux kernel | >=5.5.0<5.10.90 | |
| Linux Linux kernel | >=5.11.0<5.15.13 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.7-1 6.11.9-1 |
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Reference Links
- https://git.kernel.org/stable/c/292d2ac61fb0d9276a0f7b7ce4f50426f2a1c99f
- https://git.kernel.org/stable/c/975774ea7528b489930b76a77ffc4d5379b95ff2
- https://git.kernel.org/stable/c/9f329d0d6c91142cf0ad08d23c72dd195db2633c
- https://git.kernel.org/stable/c/9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0
- https://git.kernel.org/stable/c/a02e1404e27855089d2b0a0acc4652c2ce65fe46
- https://git.kernel.org/stable/c/d1962f263a176f493400b8f91bfbf2bfedce951e
- https://git.kernel.org/stable/c/d2cb2bf39a6d17ef4bdc0e59c1a35cf5751ad8f4
- https://git.kernel.org/stable/c/e79ff8c68acb1eddf709d3ac84716868f2a91012
- https://launchpad.net/bugs/cve/CVE-2021-46932
- https://git.kernel.org/linus/9f3ccdc3f6ef10084ceb3a47df0961bec6196fd0
- https://security-tracker.debian.org/tracker/CVE-2021-46932
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-46932
- https://nvd.nist.gov/vuln/detail/CVE-2021-46932
- https://ubuntu.com/security/CVE-2021-46932
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