# CVE-2026-74438: linux: In the Linux kernel, the following vulnerability has been resolved:  crypto: sun4i-ss - Remove insecure and unused rn...

CVE-2026-74438 is fixed in linux on 1 platform, first by DEBIAN-CVE-2026-74438, released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-74438
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0019
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 15, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  crypto: sun4i-ss - Remove insecure and unused rng_alg  Remove sun4i_ss_rng, as it is insecure and unused:  - It has multiple vulnerabilities.  sun4i_ss_prng_seed() is missing   locking and has a buffer overflow.  sun4i_ss_prng_generate() fails to   fill the entire buffer with cryptographic random bytes, because it   rounds the destination length down and also doesn't actually wait for   the hardware to be ready before pulling bytes from it.  - No user of this code is known.  It's usable only theoretically via the   "rng" algorithm type of AF_ALG.  But userspace actually just uses the   actual Linux RNG (/dev/random etc) instead.  And rng_algs don't   contribute entropy to the actual Linux RNG either.  (This may have   been confused with hwrng, which does contribute entropy.)  The sun4i_ss_prng_seed() buffer overflow was reported by Tianchu Chen and discovered by Atuin - Automated Vulnerability Discovery Engine  There's no point in fixing all these vulnerabilities individually when this is unused code, so let's just remove it.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.180-1 | [DEBIAN-CVE-2026-74438](https://patchblox.com/security/data/fix/linux/debian-cve-2026-74438.md) | Aug 15, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.100-1 | [DEBIAN-CVE-2026-74438](https://patchblox.com/security/data/fix/linux/debian-cve-2026-74438.md) | Aug 15, 2026 |
| Linux | linux Debian 14 | 7.1.5-1 | [DEBIAN-CVE-2026-74438](https://patchblox.com/security/data/fix/linux/debian-cve-2026-74438.md) | Aug 15, 2026 |

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Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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