PT-2026-64525 · Linux · Linux

CVE-2026-64304 · Published 2026-07-25 · Updated 2026-07-25

Mitre

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

In the Linux kernel, the following vulnerability has been resolved:

crypto: qat - validate RSA CRT component lengths

The generic RSA key parser (rsa helper.c) bounds each CRT component (p, q, dp, dq, qinv) by the modulus size n sz, but qat rsa setkey crt() allocates half-size DMA buffers (key sz / 2) and right-aligns each component with:

memcpy(dst + half key sz - len, src, len)

When a CRT component is larger than half key sz the subtraction underflows and memcpy writes past the DMA buffer, causing memory corruption.

Add a len > half key sz check next to the existing !len check for each of the five CRT components so the driver falls back to the non-CRT path instead of writing out of bounds.

Fix

Related Identifiers

CVE-2026-64304

Affected Products

Linux

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2026-64304 · Security Note
• https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9 · Note
• https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a · Note
• https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82 · Note
• https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91 · Note
• https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b · Note
• https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481 · Note
• https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844 · Note
• https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5 · Note