Answer in brief
CVE-2026-64313 records a High severity (CVSS 8.8) vulnerability in crypto: ecc - Fix carry overflow in vli multiplication. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=3c4b23901a0c766879dff680cd6bdab47bcdbbd2 <d11b2bb99bec1f5557c01cac42231e23745f49b8 || >=3c4b23901a0c766879dff680cd6bdab47bcdbbd2 <b709e0e768766abe29a49e1c1922a1604be602f4 || >=3c4b23901a0c766879dff680cd6bdab47bcdbbd2 <24a54dfa06d09813b4802a374fad3d2c0e16a884 || >=3c4b23901a0c766879dff680cd6bdab47bcdbbd2 <677450e5ef850c4d28b7956aa01104548c2a894e || >=3c4b23901a0c766879dff680cd6bdab47bcdbbd2 <5275e0fca256d081e2e7d4ba3dd8216c6e50d44e || >=3c4b23901a0c766879dff680cd6bdab47bcdbbd2 <774ddddf5eb26eeca177350413e3e2bc50930ee9 || >=3c4b23901a0c766879dff680cd6bdab47bcdbbd2 <ebaae7c4251cc0cdb2602f334d4f08a3e82d271e || >=3c4b23901a0c766879dff680cd6bdab47bcdbbd2 <27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406 | d11b2bb99bec1f5557c01cac42231e23745f49b8, b709e0e768766abe29a49e1c1922a1604be602f4, 24a54dfa06d09813b4802a374fad3d2c0e16a884, 677450e5ef850c4d28b7956aa01104548c2a894e, 5275e0fca256d081e2e7d4ba3dd8216c6e50d44e, 774ddddf5eb26eeca177350413e3e2bc50930ee9, ebaae7c4251cc0cdb2602f334d4f08a3e82d271e, 27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406 |
| Linux/Linuxgeneric | 4.8 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.