crypto: ecc - Fix carry overflow in vli multiplication
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.
CVE-2026-64313
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-64313
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
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"version": "3c4b23901a0c766879dff680cd6bdab47bcdbbd2",
"lessThan": "d11b2bb99bec1f5557c01cac42231e23745f49b8",
"versionType": "git"
},
{
"status": "affected",
"version": "3c4b23901a0c766879dff680cd6bdab47bcdbbd2",
"lessThan": "b709e0e768766abe29a49e1c1922a1604be602f4",
"versionType": "git"
},
{
"status": "affected",
"version": "3c4b23901a0c766879dff680cd6bdab47bcdbbd2",
"lessThan": "24a54dfa06d09813b4802a374fad3d2c0e16a884",
"versionType": "git"
},
{
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"lessThan": "677450e5ef850c4d28b7956aa01104548c2a894e",
"versionType": "git"
},
{
"status": "affected",
"version": "3c4b23901a0c766879dff680cd6bdab47bcdbbd2",
"lessThan": "5275e0fca256d081e2e7d4ba3dd8216c6e50d44e",
"versionType": "git"
},
{
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"lessThan": "774ddddf5eb26eeca177350413e3e2bc50930ee9",
"versionType": "git"
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{
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"versionType": "git"
},
{
"status": "affected",
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"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"
}
]- Related CVEs
- CVE-2026-64313
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41006 · Revision 1
- Added to Heist Feed
- Publisher date