8.8
HIGH
CVSS 3.1
CVE-2026-64313
crypto: ecc - Fix carry overflow in vli multiplication
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: ecc - Fix carry overflow in vli multiplication The carry flag calculation fails when r01.m_high is saturated (0xFFFFFFFFFFFFFFFF) and addition of lower bits overflows. The condition (r01.m_high < product.m_high) doesn't handle the case where r01.m_high == product.m_high and an additional carry exists from lower-bit overflow. When commit 3c4b23901a0c ("crypto: ecdh - Add ECDH software support") introduced crypto/ecc.c, it split the muladd() function in the micro-ecc library into separate mul_64_64() and add_128_128() helpers. It seems the check got lost in translation. Add proper handling for this boundary by accounting for the carry from the lower addition.
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
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
Apply the provided patch to correct carry flag calculation in vli multiplication.
- Apply the ECC crypto carry overflow fix patch.
- Update the Linux kernel to include the fix.
- Verify correct vli multiplication handling.
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-2026-64313.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-64313 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-2026-64313
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-2026-64313 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-64313 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': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': 'd11b2bb99bec1f5557c01cac42231e23745f49b8', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': 'b709e0e768766abe29a49e1c1922a1604be602f4', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '24a54dfa06d09813b4802a374fad3d2c0e16a884', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '677450e5ef850c4d28b7956aa01104548c2a894e', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '5275e0fca256d081e2e7d4ba3dd8216c6e50d44e', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '774ddddf5eb26eeca177350413e3e2bc50930ee9', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': 'ebaae7c4251cc0cdb2602f334d4f08a3e82d271e', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406', 'versionType': 'git'}], 'programFiles': ['crypto/ecc.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': ['crypto/ecc.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': 'd11b2bb99bec1f5557c01cac42231e23745f49b8', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': 'b709e0e768766abe29a49e1c1922a1604be602f4', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '24a54dfa06d09813b4802a374fad3d2c0e16a884', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '677450e5ef850c4d28b7956aa01104548c2a894e', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '5275e0fca256d081e2e7d4ba3dd8216c6e50d44e', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '774ddddf5eb26eeca177350413e3e2bc50930ee9', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': 'ebaae7c4251cc0cdb2602f334d4f08a3e82d271e', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406', 'versionType': 'git'}], 'programFiles': ['crypto/ecc.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': ['crypto/ecc.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:A/AC:L/PR:N/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': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': 'd11b2bb99bec1f5557c01cac42231e23745f49b8', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': 'b709e0e768766abe29a49e1c1922a1604be602f4', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '24a54dfa06d09813b4802a374fad3d2c0e16a884', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '677450e5ef850c4d28b7956aa01104548c2a894e', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '5275e0fca256d081e2e7d4ba3dd8216c6e50d44e', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '774ddddf5eb26eeca177350413e3e2bc50930ee9', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': 'ebaae7c4251cc0cdb2602f334d4f08a3e82d271e', 'versionType': 'git'}, {'status': 'affected', 'version': '3c4b23901a0c766879dff680cd6bdab47bcdbbd2', 'lessThan': '27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406', 'versionType': 'git'}], 'programFiles': ['crypto/ecc.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': ['crypto/ecc.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: crypto: ecc - Fix carry overflow in vli multiplication The carry flag calculation fails when r01.m_high is saturated (0xFFFFFFFFFFFFFFFF) and addition of lower bits overflows. The condition (r01.m_high < product.m_high) doesn't handle the case where r01.m_high == product.m_high and an additional carry exists from lower-bit overflow. When commit 3c4b23901a0c ("crypto: ecdh - Add ECDH software support") introduced crypto/ecc.c, it split the muladd() function in the micro-ecc library into separate mul_64_64() and add_128_128() helpers. It seems the check got lost in translation. Add proper handling for this boundary by accounting for the carry from the lower addition. Added Reference https://git.kernel.org/stable/c/24a54dfa06d09813b4802a374fad3d2c0e16a884 Added Reference https://git.kernel.org/stable/c/27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406 Added Reference https://git.kernel.org/stable/c/5275e0fca256d081e2e7d4ba3dd8216c6e50d44e Added Reference https://git.kernel.org/stable/c/677450e5ef850c4d28b7956aa01104548c2a894e Added Reference https://git.kernel.org/stable/c/774ddddf5eb26eeca177350413e3e2bc50930ee9 Added Reference https://git.kernel.org/stable/c/b709e0e768766abe29a49e1c1922a1604be602f4 Added Reference https://git.kernel.org/stable/c/d11b2bb99bec1f5557c01cac42231e23745f49b8 Added Reference https://git.kernel.org/stable/c/ebaae7c4251cc0cdb2602f334d4f08a3e82d271e
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.