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7.8
HIGH CVSS 3.1
CVE-2026-64304
crypto: qat - validate RSA CRT component lengths
Overview
Description

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.

Details
INFO

Published Date :

July 25, 2026, 10:17 a.m.

Last Modified :

Aug. 17, 2026, 5:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64304 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Validate RSA CRT component lengths to prevent buffer overflows and memory corruption.
  • Update the Linux kernel to include the fix.
  • Ensure RSA CRT components do not exceed half modulus size.
  • Fallback to non-CRT path for oversized components.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64304.

URL Resource
https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82
https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91
https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844
https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b
https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a
https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5
https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481
https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64304 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64304 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64304 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64304 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '6d99c5fadd2df488103f64d6475b63ba6852202b', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': 'c34369473bfe92a0b46ec78d6358e30341c7f481', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '1002719d13072a5e4be1e993aa61dffb4a604e82', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '500319830d76911c120dc0b9605f8c16d7702844', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '3d61a214fdcda41f1ebfabbb483404032a7b4d91', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': 'ce42224487c504aee4b7ff3a7342e7b4d7e28cc9', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': 'b3ac78756588059729b9195fcc9f4b37d54057a5', 'versionType': 'git'}], 'programFiles': ['drivers/crypto/intel/qat/qat_common/qat_asym_algs.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/crypto/intel/qat/qat_common/qat_asym_algs.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '6d99c5fadd2df488103f64d6475b63ba6852202b', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': 'c34369473bfe92a0b46ec78d6358e30341c7f481', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '1002719d13072a5e4be1e993aa61dffb4a604e82', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '500319830d76911c120dc0b9605f8c16d7702844', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '3d61a214fdcda41f1ebfabbb483404032a7b4d91', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': 'ce42224487c504aee4b7ff3a7342e7b4d7e28cc9', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': 'b3ac78756588059729b9195fcc9f4b37d54057a5', 'versionType': 'git'}], 'programFiles': ['drivers/crypto/intel/qat/qat_common/qat_asym_algs.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/crypto/intel/qat/qat_common/qat_asym_algs.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 27, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '6d99c5fadd2df488103f64d6475b63ba6852202b', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': 'c34369473bfe92a0b46ec78d6358e30341c7f481', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '1002719d13072a5e4be1e993aa61dffb4a604e82', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '500319830d76911c120dc0b9605f8c16d7702844', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '3d61a214fdcda41f1ebfabbb483404032a7b4d91', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': '6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': 'ce42224487c504aee4b7ff3a7342e7b4d7e28cc9', 'versionType': 'git'}, {'status': 'affected', 'version': '879f77e9071f029e1c9bd5a75814ecf51370f846', 'lessThan': 'b3ac78756588059729b9195fcc9f4b37d54057a5', 'versionType': 'git'}], 'programFiles': ['drivers/crypto/intel/qat/qat_common/qat_asym_algs.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.8'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.8', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.96', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/crypto/intel/qat/qat_common/qat_asym_algs.c'], 'defaultStatus': 'affected'}]
    Added Description 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.
    Added Reference https://git.kernel.org/stable/c/1002719d13072a5e4be1e993aa61dffb4a604e82
    Added Reference https://git.kernel.org/stable/c/3d61a214fdcda41f1ebfabbb483404032a7b4d91
    Added Reference https://git.kernel.org/stable/c/500319830d76911c120dc0b9605f8c16d7702844
    Added Reference https://git.kernel.org/stable/c/6d99c5fadd2df488103f64d6475b63ba6852202b
    Added Reference https://git.kernel.org/stable/c/6fb62b767f3e27661e8f8d2f7b85f4e098fcdb1a
    Added Reference https://git.kernel.org/stable/c/b3ac78756588059729b9195fcc9f4b37d54057a5
    Added Reference https://git.kernel.org/stable/c/c34369473bfe92a0b46ec78d6358e30341c7f481
    Added Reference https://git.kernel.org/stable/c/ce42224487c504aee4b7ff3a7342e7b4d7e28cc9
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact