# CVE-2026-64311: linux: In the Linux kernel, the following vulnerability has been resolved:  crypto: loongson - Remove broken and unused loon...

CVE-2026-64311 is fixed in linux on 1 platform by DEBIAN-CVE-2026-64311 (version 7.1.4-1), released August 7, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-64311
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 25, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  crypto: loongson - Remove broken and unused loongson-rng  The loongson-rng rng_alg has several vulnerabilities, including not providing forward security, and a use-after-free bug due to the use of wait_for_completion_interruptible().  Meanwhile, the rng_alg framework doesn't really have any purpose in the first place other than to access the software algorithms crypto/drbg.c and crypto/jitterentropy.c.  Hardware-specific rng_algs have no in-kernel user, and unlike hwrng there's no feed into the actual Linux RNG.  As such, there's really no point to this code.  There are of course other rng_alg drivers that are similarly unused, but they're similarly in the process of being phased out, e.g. https://lore.kernel.org/r/20260529193648.18172-1-ebiggers@kernel.org and https://lore.kernel.org/r/20260529220430.34135-1-ebiggers@kernel.org  Given that, there's no point in fixing forward these vulnerabilities, and it makes much more sense to simply roll back the addition of this driver.  If this platform provides TRNG (not PRNG) functionality, it could make sense to add a hwrng driver, but it would be quite different.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 14 | 7.1.4-1 | [DEBIAN-CVE-2026-64311](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64311.md) | Aug 7, 2026 |

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Data as of 2026-11-09T01:18:40Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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