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CVE-2026-64304

crypto: qat - validate RSA CRT component lengths

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.96, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From 879f77e9071f029e1c9bd5a75814ecf51370f846 · fixed in 6d99c5fadd2df488103f64d6475b63ba6852202b; From 879f77e9071f029e1c9bd5a75814ecf51370f846 · fixed in c34369473bfe92a0b46ec78d6358e30341c7f481; From 879f77e9071f029e1c9bd5a75814ecf51370f846 · fixed in 1002719d13072a5e4be1e993aa61dffb4a604e82; From 879f77e9071f029e1c9bd5a75814ecf51370f846 · fixed in 500319830d76911c120dc0b9605f8c16d7702844; From 879f77e9071f029e1c9bd5a75814ecf51370f846 · fixed in 3d61a214fdcda41f1ebfabbb483404032a7b4d91; From 879f77e9071f029e1c9bd5a75814ecf51370f846 · fixed in 6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a; From 879f77e9071f029e1c9bd5a75814ecf51370f846 · fixed in ce42224487c504aee4b7ff3a7342e7b4d7e28cc9; From 879f77e9071f029e1c9bd5a75814ecf51370f846 · fixed in b3ac78756588059729b9195fcc9f4b37d54057a5

  • Linux Linux

    4.8

  • KernelLinux

    From 4.8.0 · fixed in 5.10.261; From 5.11.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.96; From 6.13.0 · fixed in 6.18.39; From 6.19.0 · fixed in 7.1.4

References 8

git.kernel.org