CVE-2026-80836
Low risk· EPSS 6%Exploitation Probability (EPSS)
Low risk6th percentile - higher than 6% of all known CVEs
Summary
In the Linux kernel's crypto virtio module, there is an out-of-bounds read vulnerability. The virtio_crypto_dataq_akcipher_callback() function sets the result length from the device-reported response length without bounding it to the destination buffer, which was allocated for the original request length. sg_copy_from_buffer() then reads that many bytes from the destination buffer; a backend reporting a larger length over-reads adjacent kernel heap into the caller's scatterlist (an out-of-bounds read). The fix clamps the reported length to the originally requested destination length.
Risk Assessment
A malicious or faulty virtual device can cause kernel memory disclosure, potentially compromising system data confidentiality.
Recommendation
Install the Linux kernel update containing the fix for crypto virtio. Ensure virtual devices are trusted and compliant with the specification.
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Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: crypto: virtio - bound the akcipher result length virtio_crypto_dataq_akcipher_callback() sets the result length from the device-reported response length without bounding it to the destination buffer, which was allocated for the original request length. sg_copy_from_buffer() then reads that many bytes from the destination buffer; a backend reporting a larger length over-reads adjacent kernel heap into the caller's scatterlist (an out-of-bounds read). Clamp the reported length to the originally requested destination length. A conforming device reports no more than that, so valid results are unaffected.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS