{"id":"CVE-2026-64313","revision":"2d06f2b100b04f62ba741fd7f1223ea9","records":[{"revision":"2d06f2b100b04f62ba741fd7f1223ea9","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64313","aliases":[],"title":"crypto: ecc - Fix carry overflow in vli multiplication","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ecc - Fix carry overflow in vli multiplication\n\nThe carry flag calculation fails when r01.m_high is saturated\n(0xFFFFFFFFFFFFFFFF) and addition of lower bits overflows.\n\nThe condition (r01.m_high < product.m_high) doesn't handle the case\nwhere r01.m_high == product.m_high and an additional carry exists\nfrom lower-bit overflow.\n\nWhen commit 3c4b23901a0c (\"crypto: ecdh - Add ECDH software support\")\nintroduced crypto/ecc.c, it split the muladd() function in the\nmicro-ecc library into separate mul_64_64() and add_128_128() helpers.\nIt seems the check got lost in translation.\n\nAdd proper handling for this boundary by accounting for the carry\nfrom the lower addition.","state":0,"publishedAt":"2026-07-25T08:49:44.546+00:00","modifiedAt":"2026-10-19T20:38:23.266+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"crypto/ecc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"3c4b23901a0c766879dff680cd6bdab47bcdbbd2\",\n                            \"lessThan\": \"d11b2bb99bec1f5557c01cac42231e23745f49b8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3c4b23901a0c766879dff680cd6bdab47bcdbbd2\",\n                            \"lessThan\": \"b709e0e768766abe29a49e1c1922a1604be602f4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3c4b23901a0c766879dff680cd6bdab47bcdbbd2\",\n                            \"lessThan\": \"24a54dfa06d09813b4802a374fad3d2c0e16a884\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3c4b23901a0c766879dff680cd6bdab47bcdbbd2\",\n                            \"lessThan\": \"677450e5ef850c4d28b7956aa01104548c2a894e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3c4b23901a0c766879dff680cd6bdab47bcdbbd2\",\n                            \"lessThan\": \"5275e0fca256d081e2e7d4ba3dd8216c6e50d44e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3c4b23901a0c766879dff680cd6bdab47bcdbbd2\",\n                            \"lessThan\": \"774ddddf5eb26eeca177350413e3e2bc50930ee9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3c4b23901a0c766879dff680cd6bdab47bcdbbd2\",\n                            \"lessThan\": \"ebaae7c4251cc0cdb2602f334d4f08a3e82d271e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"3c4b23901a0c766879dff680cd6bdab47bcdbbd2\",\n                            \"lessThan\": \"27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"crypto/ecc.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.8\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.261\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.212\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.178\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.96\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.39\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.4\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"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"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64313","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64313","identifiers":["CVE-2026-64313"]},"retained":false,"historicalAffected":[]}],"coverage":[]}