{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "3c4b23901a0c766879dff680cd6bdab47bcdbbd2"
            },
            {
              "fixed": "d11b2bb99bec1f5557c01cac42231e23745f49b8"
            },
            {
              "fixed": "b709e0e768766abe29a49e1c1922a1604be602f4"
            },
            {
              "fixed": "24a54dfa06d09813b4802a374fad3d2c0e16a884"
            },
            {
              "fixed": "677450e5ef850c4d28b7956aa01104548c2a894e"
            },
            {
              "fixed": "5275e0fca256d081e2e7d4ba3dd8216c6e50d44e"
            },
            {
              "fixed": "774ddddf5eb26eeca177350413e3e2bc50930ee9"
            },
            {
              "fixed": "ebaae7c4251cc0cdb2602f334d4f08a3e82d271e"
            },
            {
              "fixed": "27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.8.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.96"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.39"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64313.json"
  },
  "details": "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 \u003c 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.",
  "id": "CVE-2026-64313",
  "modified": "2026-07-28T03:56:09.349381919Z",
  "published": "2026-07-25T08:49:44.546Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24a54dfa06d09813b4802a374fad3d2c0e16a884"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27b536a2ec8e2f85a0380c2d13c9ecbc7aaab406"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5275e0fca256d081e2e7d4ba3dd8216c6e50d44e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/677450e5ef850c4d28b7956aa01104548c2a894e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/774ddddf5eb26eeca177350413e3e2bc50930ee9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b709e0e768766abe29a49e1c1922a1604be602f4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d11b2bb99bec1f5557c01cac42231e23745f49b8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebaae7c4251cc0cdb2602f334d4f08a3e82d271e"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64313.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64313"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "crypto: ecc - Fix carry overflow in vli multiplication"
}