CVEvulnerability
CVE-2026-93163
- Status
- Received
- Published
- 2026-09-17
- Last modified
- 2026-10-30
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
hwrng: core - fix rng list on registration error
hwrng_register(rng) does the following:
1. Checks if rng has name and read methods set
2. Checks if the name already exists
3. Adds rng to global rng_list
4. May try to set rng to current_rng
If step 4 fails, it returns an error. However, it does not remove the
rng from rng_list, causing a dangling reference which can result in
use-after-free if the caller frees rng, since registration failed.
Add a list_del_init() cleanup step.
References
- https://git.kernel.org/stable/c/30b2cc2966dac87ee95a99c49e28486c2a8129cd git.kernel.org
- https://git.kernel.org/stable/c/3a5834db2b1ce25649f330e78efe1ccde78967fd git.kernel.org
- https://git.kernel.org/stable/c/bee8d1fcdc8f389b595b0a4cf6fe8440f499458a git.kernel.org
- https://git.kernel.org/stable/c/cf293c9c7424de0d04b51367d07f40570ce80231 git.kernel.org
- https://git.kernel.org/stable/c/de4f1bcb61a73cc896decdbd27d61a34add93b53 git.kernel.org
- https://git.kernel.org/stable/c/e37c67f768234e14cd6ea3b081568dd915c5b67e git.kernel.org