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
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
3c4b23901a0c766879dff680cd6bdab47bcdbbd2 to < d11b2bb99bec1f5557c01cac42231e23745f49b8affected3c4b23901a0c766879dff680cd6bdab47bcdbbd2 to < b709e0e768766abe29a49e1c1922a1604be602f4affected3c4b23901a0c766879dff680cd6bdab47bcdbbd2 to < 24a54dfa06d09813b4802a374fad3d2c0e16a884affected3c4b23901a0c766879dff680cd6bdab47bcdbbd2 to < 677450e5ef850c4d28b7956aa01104548c2a894eaffected3c4b23901a0c766879dff680cd6bdab47bcdbbd2 to < 5275e0fca256d081e2e7d4ba3dd8216c6e50d44eaffected3c4b23901a0c766879dff680cd6bdab47bcdbbd2 to < 774ddddf5eb26eeca177350413e3e2bc50930ee9affected3c4b23901a0c766879dff680cd6bdab47bcdbbd2 to < ebaae7c4251cc0cdb2602f334d4f08a3e82d271eaffected3c4b23901a0c766879dff680cd6bdab47bcdbbd2 to < 27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406affected
Linux Linux
Default version status: affected
4.8affected0 to < 4.8unaffected5.10.261 to ≤ 5.10.*unaffected5.15.212 to ≤ 5.15.*unaffected6.1.178 to ≤ 6.1.*unaffected6.6.145 to ≤ 6.6.*unaffected6.12.96 to ≤ 6.12.*unaffected6.18.39 to ≤ 6.18.*unaffected7.1.4 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d11b2bb99bec1f5557c01cac42231e23745f49b8 ↗
- https://git.kernel.org/stable/c/b709e0e768766abe29a49e1c1922a1604be602f4 ↗
- https://git.kernel.org/stable/c/24a54dfa06d09813b4802a374fad3d2c0e16a884 ↗
- https://git.kernel.org/stable/c/677450e5ef850c4d28b7956aa01104548c2a894e ↗
- https://git.kernel.org/stable/c/5275e0fca256d081e2e7d4ba3dd8216c6e50d44e ↗
- https://git.kernel.org/stable/c/774ddddf5eb26eeca177350413e3e2bc50930ee9 ↗
- https://git.kernel.org/stable/c/ebaae7c4251cc0cdb2602f334d4f08a3e82d271e ↗
- https://git.kernel.org/stable/c/27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406 ↗