Description
drivers/hid/hid-cp2112.c in the Linux kernel 4.9.x before 4.9.9 uses a spinlock without considering that sleeping is possible in a USB HID request callback, which allows local users to cause a denial of service (deadlock) via unspecified vectors.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.9.10-1 | — |
| Debian 13 | linux | 4.9.10-1 | — |
| Debian 12 | linux | 4.9.10-1 | — |
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7a7b5df84b6b4e5d599c7289526eed96541a0654
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.9
- [oss-security] 20170416 Silently (or obliviously) partially-fixed CONFIG_STRICT_DEVMEM bypass mailing-list
- 97991 vdb-entry
- https://github.com/torvalds/linux/commit/7a7b5df84b6b4e5d599c7289526eed96541a0654