CVE-2026-64304crypto: qat - validate RSA CRT component lengths
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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)
- Not given
- 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
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
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
- https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202bpatch
- https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481patch
- https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82patch
- https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844patch
- https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91patch
- https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1apatch
- https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9patch
- https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5patch
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.