High 7.8Published Jul 25, 2026

CVE-2026-64304crypto: qat - validate RSA CRT component lengths

Updated under an hour ago (Oct 26, 2026, 9:00 PM ET)

Does this affect you?

It affects Linux and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	879f77e9071f029e1c9bd5a75814ecf51370f846 builds before 6d99c5fadd2df488103f64d6475b63ba6852202b; from 879f77e9071f029e1c9bd5a75814ecf51370f846 before c34369473bfe92a0b46ec78d6358e30341c7f481; from 879f77e9071f029e1c9bd5a75814ecf51370f846 before 1002719d13072a5e4be1e993aa61dffb4a604e82; from 879f77e9071f029e1c9bd5a75814ecf51370f846 before 500319830d76911c120dc0b9605f8c16d7702844; 879f77e9071f029e1c9bd5a75814ecf51370f846 builds before 3d61a214fdcda41f1ebfabbb483404032a7b4d91; 879f77e9071f029e1c9bd5a75814ecf51370f846 builds before 6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a; from 879f77e9071f029e1c9bd5a75814ecf51370f846 before ce42224487c504aee4b7ff3a7342e7b4d7e28cc9; from 879f77e9071f029e1c9bd5a75814ecf51370f846 before b3ac78756588059729b9195fcc9f4b37d54057a5	CNA record
linux linux_kernel linux:linux_kernel	from 4.8 before 5.10.261; from 5.11 before 5.15.212; from 5.16 before 6.1.178; from 6.2 before 6.6.145; from 6.7 before 6.12.96; from 6.13 before 6.18.39; from 6.19 before 7.1.4	NVD

References

References

https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b	patch
https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481	patch
https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82	patch
https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844	patch
https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91	patch
https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a	patch
https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9	patch
https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.