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.
Metrics
Affected Vendors & Products
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| Vendors | Products |
|---|---|
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Linux
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Linux Kernel
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| Source | ID | Title |
|---|---|---|
 Debian DLA |
DLA-4817-1 | linux-6.12 security update |
 Debian DSA |
DSA-6528-1 | linux security update |
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Fri, 30 Oct 2026 12:45:00 +0000
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| References |
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Wed, 21 Oct 2026 13:15:00 +0000
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Sat, 19 Sep 2026 09:00:00 +0000
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| Weaknesses | CWE-416 |
Thu, 17 Sep 2026 16:30:00 +0000
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| 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. | |
| Title | hwrng: core - fix rng list on registration error | |
| First Time appeared |
Linux
Linux linux Kernel |
|
| CPEs | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Linux
Linux linux Kernel |
|
| References |
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Projects
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MITRE
Status: PUBLISHED
Assigner: Linux
Published:
Updated: 2026-10-30T12:36:10.984Z
Reserved: 2026-09-17T16:02:15.089Z
Link: CVE-2026-93163
Vulnrichment
No data.
NVD
Status : Received
Published: 2026-09-17T17:18:11.763
Modified: 2026-10-30T13:20:58.657
Link: CVE-2026-93163
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-09-19T18:45:14Z