VULNERABILITY INTELLIGENCE

CVE-2026-64304

CVSS score7.8 HIGH
EPSS probability0.17%
CISA KEVNot currently listed
Published2026-07-25
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

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.

Weakness classification

  • nvd@nist.gov: CWE-787
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-787

Primary references