CVE-2026-64313

UNKNOWN 0.0

crypto: ecc - Fix carry overflow in vli multiplication

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

Vendor	linux
Product	linux
Ecosystems	Linux Kernel
Industries	Technology
Published	Jul 25, 2026

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Affected Versions

Linux / Linux

3c4b23901a0c766879dff680cd6bdab47bcdbbd2 < d11b2bb99bec1f5557c01cac42231e23745f49b8 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 < b709e0e768766abe29a49e1c1922a1604be602f4 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 < 24a54dfa06d09813b4802a374fad3d2c0e16a884 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 < 677450e5ef850c4d28b7956aa01104548c2a894e 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 < 5275e0fca256d081e2e7d4ba3dd8216c6e50d44e 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 < 774ddddf5eb26eeca177350413e3e2bc50930ee9 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 < ebaae7c4251cc0cdb2602f334d4f08a3e82d271e 3c4b23901a0c766879dff680cd6bdab47bcdbbd2 < 27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406

Linux / Linux

4.8

References

NVD ↗ CVE.org ↗ EPSS Data ↗