{"id":"CVE-2026-43383","summary":"net/tcp-md5: Fix MAC comparison to be constant-time","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/tcp-md5: Fix MAC comparison to be constant-time\n\nTo prevent timing attacks, MACs need to be compared in constant\ntime.  Use the appropriate helper function for this.","modified":"2026-05-28T03:54:11.402853739Z","published":"2026-05-08T14:21:30.704Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43383.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/02669e2a4d207068edce7e8b5fafd85822018ce6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/345a9530756528d7ca407663d659c3c40e75c3dd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46d0d6f50dab706637f4c18a470aac20a21900d3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d305a95130a8d08b9545e47f1e18d29d59866cb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/821c8751fdeecdeecabeb11704dd33439c9e4bbc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ae3831b44f477de048287493e184fc3ff913b624"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b502e97e29d791ff7a8051f29a414535739be218"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43383.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43383"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cfb6eeb4c860592edd123fdea908d23c6ad1c7dc"},{"fixed":"821c8751fdeecdeecabeb11704dd33439c9e4bbc"},{"fixed":"345a9530756528d7ca407663d659c3c40e75c3dd"},{"fixed":"5d305a95130a8d08b9545e47f1e18d29d59866cb"},{"fixed":"02669e2a4d207068edce7e8b5fafd85822018ce6"},{"fixed":"ae3831b44f477de048287493e184fc3ff913b624"},{"fixed":"b502e97e29d791ff7a8051f29a414535739be218"},{"fixed":"46d0d6f50dab706637f4c18a470aac20a21900d3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43383.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.20"},{"fixed":"5.10.253"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"6.1.167"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.78"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.19"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43383.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H"}]}