PT-2026-64525 · Linux · Linux
CVE-2026-64304
·
Publicado
2026-07-25
·
Atualizado
2026-07-25
CVSS v3.1
7.8
Alta
| Vetor | 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.
Correção
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