CVE-2026-64304

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux879f77e9071f029e1c9bd5a75814ecf51370f846 < 6d99c5fadd2df488103f64d6475b63ba6852202baffected
LinuxLinux879f77e9071f029e1c9bd5a75814ecf51370f846 < c34369473bfe92a0b46ec78d6358e30341c7f481affected
LinuxLinux879f77e9071f029e1c9bd5a75814ecf51370f846 < 1002719d13072a5e4be1e993aa61dffb4a604e82affected
LinuxLinux879f77e9071f029e1c9bd5a75814ecf51370f846 < 500319830d76911c120dc0b9605f8c16d7702844affected
LinuxLinux879f77e9071f029e1c9bd5a75814ecf51370f846 < 3d61a214fdcda41f1ebfabbb483404032a7b4d91affected
LinuxLinux879f77e9071f029e1c9bd5a75814ecf51370f846 < 6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1aaffected
LinuxLinux879f77e9071f029e1c9bd5a75814ecf51370f846 < ce42224487c504aee4b7ff3a7342e7b4d7e28cc9affected
LinuxLinux879f77e9071f029e1c9bd5a75814ecf51370f846 < b3ac78756588059729b9195fcc9f4b37d54057a5affected
LinuxLinux4.8affected
LinuxLinux0 < 4.8unaffected
LinuxLinux5.10.261 <= 5.10.*unaffected
LinuxLinux5.15.212 <= 5.15.*unaffected
LinuxLinux6.1.178 <= 6.1.*unaffected
LinuxLinux6.6.145 <= 6.6.*unaffected
LinuxLinux6.12.96 <= 6.12.*unaffected
LinuxLinux6.18.39 <= 6.18.*unaffected
LinuxLinux7.1.4 <= 7.1.*unaffected
LinuxLinux7.2-rc1 <= *unaffected

Weaknesses

References