Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 2bbb6983887fefc8026beab01198d30f47b7bd22 before e37c67f768234e14cd6ea3b081568dd915c5b67e; affected 2bbb6983887fefc8026beab01198d30f47b7bd22 before de4f1bcb61a73cc896decdbd27d61a34add93b53; affected 2bbb6983887fefc8026beab01198d30f47b7bd22 before cf293c9c7424de0d04b51367d07f40570ce80231; affected 2bbb6983887fefc8026beab01198d30f47b7bd22 before bee8d1fcdc8f389b595b0a4cf6fe8440f499458a; affected 2bbb6983887fefc8026beab01198d30f47b7bd22 before 3a5834db2b1ce25649f330e78efe1ccde78967fd; affected 42802952a2725f85f7e36ee3b29593af5fe87197; affected 4.9.320 before 4.10 |
| Linux / Linux | affected 4.14; unaffected 0 before 4.14; unaffected 6.6.160 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e37c67f768234e14cd6ea3b081568dd915c5b67e
- https://git.kernel.org/stable/c/de4f1bcb61a73cc896decdbd27d61a34add93b53
- https://git.kernel.org/stable/c/cf293c9c7424de0d04b51367d07f40570ce80231
- https://git.kernel.org/stable/c/bee8d1fcdc8f389b595b0a4cf6fe8440f499458a
- https://git.kernel.org/stable/c/3a5834db2b1ce25649f330e78efe1ccde78967fd