UBUNTU-CVE-2026-80836

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UBUNTU-CVE-2026-80836

Summary:

Details: 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.

References: https://ubuntu.com/security/CVE-2026-80836, https://www.cve.org/CVERecord?id=CVE-2026-80836, https://git.kernel.org/linus/f77a956f6a19f9463ef1527c9d0cda50dded6b92