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 m
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This CVE exploits attack patterns that Casky's 0matched skills already investigate — long before this vulnerability was disclosed. Claude's reasoning model maps these techniques to MITRE ATT&CK, so practitioners who ran these skills have already seen the threat behaviour in their findings.
CVE-2026-64311 addresses critical vulnerabilities in the Linux kernel's loongson-rng random number generator implementation. The vulnerability encompasses multiple security deficiencies: the RNG fails to provide forward security properties, meaning compromised state could expose previously generated "random" values, and contains a use-after-free bug stemming from improper use of wait_for_completion_interruptible() synchronization primitives. This affects systems running vulnerable Linux kernel versions with Loongson architecture support enabled, particularly in environments where cryptographic randomness is critical for security operations. The resolution removes the broken component entirely, as the rng_alg framework lacks practical utility beyond accessing software-based alternatives already present in the kernel.
While Casky.ai's 754 MITRE ATT&CK-mapped security skills currently show zero direct matches for this CVE, practitioners using Claude AI with extended reasoning can identify related attack patterns through weakness analysis. The use-after-free condition maps to CWE memory safety issues that enable code execution under T1190 (Exploit Public-Facing Application) or T1203 (Exploitation for Privilege Escalation). Compromised RNG forward security connects to T1040 (Traffic Sniffing) and T1566 (Phishing) attack chains where predictable cryptographic material aids adversary objectives. Security teams should monitor kernel security advisories, validate their systems don't rely on loongson-rng, and apply patches immediately—Casky practitioners would analyze system cryptographic dependencies and trace RNG usage through their infrastructure to ensure no exposure to this class of vulnerability.
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