CVE-2026-80836

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxa36bd0ad9fbf69d0d711b1c105954ce8d6cc144a < 5545de5050cbc3594506d74f2c392b0716cf8bcaaffected
LinuxLinuxa36bd0ad9fbf69d0d711b1c105954ce8d6cc144a < 3fda114a42f1510a4ec8a0b17a0cfc997952ccc2affected
LinuxLinuxa36bd0ad9fbf69d0d711b1c105954ce8d6cc144a < 1f9f877b1ef1fbd4ee95571cddf39c8002cee252affected
LinuxLinuxa36bd0ad9fbf69d0d711b1c105954ce8d6cc144a < f77a956f6a19f9463ef1527c9d0cda50dded6b92affected
LinuxLinux5.19affected
LinuxLinux0 < 5.19unaffected
LinuxLinux6.18.49 <= 6.18.*unaffected
LinuxLinux7.1.13 <= 7.1.*unaffected
LinuxLinux7.2.3 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References