crypto: ecc - Fix carry overflow in vli multiplication
Summary
| CVE | CVE-2026-64313 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-25 10:17:12 UTC |
| Updated | 2026-07-25 10:17:12 UTC |
| 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. |
Risk And Classification
EPSS: 0.002200000 probability, percentile 0.126010000 (date 2026-07-25)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 d11b2bb99bec1f5557c01cac42231e23745f49b8 git | Not specified |
| CNA | Linux | Linux | affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 b709e0e768766abe29a49e1c1922a1604be602f4 git | Not specified |
| CNA | Linux | Linux | affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 24a54dfa06d09813b4802a374fad3d2c0e16a884 git | Not specified |
| CNA | Linux | Linux | affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 677450e5ef850c4d28b7956aa01104548c2a894e git | Not specified |
| CNA | Linux | Linux | affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 5275e0fca256d081e2e7d4ba3dd8216c6e50d44e git | Not specified |
| CNA | Linux | Linux | affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 774ddddf5eb26eeca177350413e3e2bc50930ee9 git | Not specified |
| CNA | Linux | Linux | affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 ebaae7c4251cc0cdb2602f334d4f08a3e82d271e git | Not specified |
| CNA | Linux | Linux | affected 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406 git | Not specified |
| CNA | Linux | Linux | affected 4.8 | Not specified |
| CNA | Linux | Linux | unaffected 4.8 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.96 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.39 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.4 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2-rc1 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/774ddddf5eb26eeca177350413e3e2bc50930ee9 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d11b2bb99bec1f5557c01cac42231e23745f49b8 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/24a54dfa06d09813b4802a374fad3d2c0e16a884 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/677450e5ef850c4d28b7956aa01104548c2a894e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b709e0e768766abe29a49e1c1922a1604be602f4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ebaae7c4251cc0cdb2602f334d4f08a3e82d271e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/5275e0fca256d081e2e7d4ba3dd8216c6e50d44e | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.