PT-2026-64532 · Linux · Linux
CVE-2026-64311
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Published
2026-07-25
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Updated
2026-07-25
None
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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.
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Related Identifiers
Affected Products
Linux