{"id":"CVE-2026-31628","summary":"x86/CPU: Fix FPDSS on Zen1","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nx86/CPU: Fix FPDSS on Zen1\n\nZen1's hardware divider can leave, under certain circumstances, partial\nresults from previous operations.  Those results can be leaked by\nanother, attacker thread.\n\nFix that with a chicken bit.","modified":"2026-05-18T05:59:52.601433186Z","published":"2026-04-24T14:42:49.181Z","related":["openSUSE-SU-2026:10703-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31628.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0548529af20e68c6552817834b766646dd3bd7a7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1272cfedf4cd1019ddf583917a99b62f2d3645bb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/546785c719418c6166834a47e372a88f5f7ae893"},{"type":"WEB","url":"https://git.kernel.org/stable/c/91f02726b2203b71545713ecb7fb006e60a2d66f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ad17f07e95e6e8505e2153e5b391f0d27eacce25"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b731aca06387b195058a9f6449a03b62efa1bd10"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e55d98e7756135f32150b9b8f75d580d0d4b2dd3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e6af5286efe5a56128b34032572c9ce9ebeccda3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ed7a3a246309ccc807238f1b4f159ee6d37ff9c4"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31628.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31628"},{"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":"f7f3dc00f61261cdc9ccd8b886f21bc4dffd6fd9"},{"fixed":"ed7a3a246309ccc807238f1b4f159ee6d37ff9c4"},{"fixed":"0548529af20e68c6552817834b766646dd3bd7a7"},{"fixed":"1272cfedf4cd1019ddf583917a99b62f2d3645bb"},{"fixed":"91f02726b2203b71545713ecb7fb006e60a2d66f"},{"fixed":"b731aca06387b195058a9f6449a03b62efa1bd10"},{"fixed":"ad17f07e95e6e8505e2153e5b391f0d27eacce25"},{"fixed":"e6af5286efe5a56128b34032572c9ce9ebeccda3"},{"fixed":"546785c719418c6166834a47e372a88f5f7ae893"},{"fixed":"e55d98e7756135f32150b9b8f75d580d0d4b2dd3"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"5abd1583e06b3963e5c9d915760367de86808b78"},{"last_affected":"4ba461d426490b6ed7e8298c4d3b7a13aa5d2686"},{"last_affected":"5a63725cd18fcee2af6ec46ccb856b64ad3077b4"}]}],"versions":["v3.16.57","v4.4.143","v4.4.142","v4.4.141","v4.4.140","v4.4.139","v4.4.138","v3.16.56","v4.4.137","v4.4.136","v4.4.135","v4.4.134","v4.4.133","v4.4.132","v4.9.101","v4.9.100","v4.9.99","v4.4.131","v4.9.98","v4.4.130","v4.9.97","v4.9.96","v4.4.129","v4.9.95","v4.4.128","v4.9.94","v4.4.127","v4.9.93","v4.9.92","v4.4.126","v4.4.125","v4.9.91","v4.4.124","v4.9.90","v4.9.89","v4.4.123","v4.4.122","v4.9.88","v3.16.55","v4.9.87","v4.4.121","v4.9.86","v4.4.120","v3.16.54","v4.9.85","v4.4.119","v4.9.84","v4.4.118","v4.9.83","v4.4.117","v4.4.116","v4.9.82","v4.9.81","v4.4.115","v3.16.53","v4.9.80","v4.9.79","v4.4.114","v4.9.78","v4.4.113","v4.9.77","v4.4.112","v4.9.76","v4.4.111","v4.9.75","v4.4.110","v3.16.52","v4.9.74","v4.4.109","v4.9.73","v4.4.108","v3.16.51","v4.9.72","v4.9.71","v4.4.107","v4.9.70","v4.4.106","v4.9.69","v4.4.105","v4.9.68","v4.9.67","v4.4.104","v4.9.66","v4.4.103","v4.9.65","v4.4.102","v3.16.50","v4.4.101","v4.9.64","v4.4.100","v4.9.63","v4.4.99","v4.9.62","v4.4.98","v4.4.97","v4.9.61","v3.16.49","v4.9.60","v4.4.96","v4.9.59","v4.4.95","v4.9.58","v4.4.94","v4.9.57","v4.4.93","v4.9.56","v4.4.92","v4.9.55","v3.16.48","v4.9.54","v4.4.91","v4.9.53","v4.4.90","v4.9.52","v4.4.89","v4.9.51","v4.4.88","v4.9.50","v3.16.47","v4.9.49","v4.4.87","v4.9.48","v4.9.47","v4.4.86","v4.9.46","v4.4.85","v4.9.45","v4.4.84","v3.16.46","v4.9.44","v4.4.83","v4.9.43","v4.4.82","v4.9.42","v4.4.81","v4.4.80","v4.9.41","v4.4.79","v4.9.40","v4.9.39","v4.4.78","v4.4.77","v4.9.38","v3.16.45","v4.9.37","v4.4.76","v4.9.36","v4.9.35","v4.4.75","v3.16.44","v4.9.34","v4.4.74","v4.4.73","v4.9.33","v4.9.32","v4.4.72","v4.9.31","v4.4.71","v4.9.30","v4.4.70","v3.16.43","v4.9.29","v4.4.69","v4.9.28","v4.4.68","v4.9.27","v4.4.67","v4.9.26","v4.4.66","v4.9.25","v4.4.65","v4.4.64","v4.9.24","v4.4.63","v4.9.23","v4.4.62","v4.4.61","v4.9.22","v4.9.21","v4.4.60","v4.4.59","v4.9.20","v3.16.42","v4.9.19","v4.4.58","v4.9.18","v4.4.57","v4.9.17","v4.4.56","v4.9.16","v4.4.55","v4.9.15","v4.4.54","v3.16.41","v4.9.14","v4.4.53","v4.9.13","v4.4.52","v4.9","v3.16.40","v4.9.12","v4.4.51","v4.9.11","v4.4.50","v3.16.39","v4.4.49","v4.9.10","v4.9.9","v4.4.48","v4.9.8","v4.4.47","v4.9.7","v4.4.46","v4.9.6","v4.4.45","v4.9.5","v4.4.44","v4.9.4","v4.4.43","v4.9.3","v4.4.42","v4.9.2","v4.4.41","v4.9.1","v4.4.40","v4.4.39","v4.9-rc7","v4.9-rc6","v4.9-rc8","v4.4.38","v4.9-rc1","v4.4.37","v4.9-rc5","v4.4.36","v4.9-rc3","v4.4.35","v4.9-rc4","v4.4.34","v4.9-rc2","v4.4.33","v3.16.38","v4.4.32","v4.4.31","v4.4.30","v4.8","v4.4.29","v4.4.28","v4.4.27","v4.4.26","v3.16.37","v4.4.25","v4.4.24","v4.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