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Review reviewHigh

CVE-2026-64304

Linux

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...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

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...

Affected product and versions

Product
Linux
Affected versions
>= 879f77e9071f029e1c9bd5a75814ecf51370f846 < 6d99c5fadd2df488103f64d6475b63ba6852202b, >= 879f77e9071f029e1c9bd5a75814ecf51370f846 < c34369473bfe92a0b46ec78d6358e30341c7f481, >= 879f77e9071f029e1c9bd5a75814ecf51370f846 < 1002719d13072a5e4be1e993aa61dffb4a604e82, >= 879f77e9071f029e1c9bd5a75814ecf51370f846 < 500319830d76911c120dc0b9605f8c16d7702844, >= 879f77e9071f029e1c9bd5a75814ecf51370f846 < 3d61a214fdcda41f1ebfabbb483404032a7b4d91, >= 879f77e9071f029e1c9bd5a75814ecf51370f846 < 6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a, >= 879f77e9071f029e1c9bd5a75814ecf51370f846 < ce42224487c504aee4b7ff3a7342e7b4d7e28cc9, >= 879f77e9071f029e1c9bd5a75814ecf51370f846 < b3ac78756588059729b9195fcc9f4b37d54057a5, >= 4.8
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available