Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: crypto: atmel-sha204a - fix heap info leak on I2C transfer failure The nonblocking RNG path allocates a work_data structure to track the state of an in-flight asynchronous I2C request. This pointer is stored in rng->priv and later consumed by the read path once the transaction completes. If the underlying I2C transfer fails, the completion callback is invoked with a non-zero status. In this case, the allocated work_data is not usable for producing RNG output and must not remain associated with the hwrng state. Previously, the failure path only logged a warning but left the pointer state uncleared, which can result in subsequent read attempts observing stale state and interpreting it as valid completion data. Fix this by freeing the pending work_data. The I2C transaction reports an error. This ensures that failed requests do not leave residual state behind that could be interpreted as valid RNG data on later reads. Clearing rng->priv is done at the subsequent call to nonblocking read.
References
- https://git.kernel.org/stable/c/0d6db386133d9230befb77967bbf130443964860
- https://git.kernel.org/stable/c/28cc179252347718f97045dd5ea74165609dbd7d
- https://git.kernel.org/stable/c/4e76d85e505b7451925efbcd67c015e8c2440c68
- https://git.kernel.org/stable/c/72bbf11ba14bd7d5fbf31a1ec42fff608b657f74
- https://git.kernel.org/stable/c/94abda77b57a35b82bba0365bad072d94d67ffe9
- https://git.kernel.org/stable/c/a430b5b6d2ddd2b266330f8507a655be1148347d
- https://git.kernel.org/stable/c/bcac9052e19490231ff6e0678a06bd2fcf8db3af
- https://git.kernel.org/stable/c/f4d347fb1309b69ea6f817a17e6b2893c8d754b7
FAQ
What is CVE-2026-93159?
CVE-2026-93159 is a documented vulnerability. In the Linux kernel, the following vulnerability has been resolved: crypto: atmel-sha204a - fix heap info leak on I2C transfer failure The nonblocking RNG path allocates a work_data structure to tra...
How severe is CVE-2026-93159?
CVSS scoring is not yet available for CVE-2026-93159. Check NVD for updates.
Is there a patch for CVE-2026-93159?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.