CVE-2026-64313
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.
Affected products
3- osv-coords2 versions
>= 4.8.0, < 5.10.261+ 1 more
- (no CPE)range: >= 4.8.0, < 5.10.261
- (no CPE)range: < 7.1.7-1.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/24a54dfa06d09813b4802a374fad3d2c0e16a884nvdPatch
- git.kernel.org/stable/c/27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406nvdPatch
- git.kernel.org/stable/c/5275e0fca256d081e2e7d4ba3dd8216c6e50d44envdPatch
- git.kernel.org/stable/c/677450e5ef850c4d28b7956aa01104548c2a894envdPatch
- git.kernel.org/stable/c/774ddddf5eb26eeca177350413e3e2bc50930ee9nvdPatch
- git.kernel.org/stable/c/b709e0e768766abe29a49e1c1922a1604be602f4nvdPatch
- git.kernel.org/stable/c/d11b2bb99bec1f5557c01cac42231e23745f49b8nvdPatch
- git.kernel.org/stable/c/ebaae7c4251cc0cdb2602f334d4f08a3e82d271envdPatch
News mentions
0No linked articles in our index yet.