{"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":"2026-11-08T02:30:15.588863349Z","published":"2026-04-24T14:42:49.181Z","related":["SUSE-SU-2026:23066-1","SUSE-SU-2026:23068-1","SUSE-SU-2026:23193-1","SUSE-SU-2026:23194-1","SUSE-SU-2026:23221-1","SUSE-SU-2026:23231-1","SUSE-SU-2026:23237-1","SUSE-SU-2026:23241-1","SUSE-SU-2026:23244-1","SUSE-SU-2026:3593-1","SUSE-SU-2026:3594-1","SUSE-SU-2026:3595-1","SUSE-SU-2026:3602-1","SUSE-SU-2026:3616-1","SUSE-SU-2026:3617-1","SUSE-SU-2026:3790-1","SUSE-SU-2026:3810-1","openSUSE-SU-2026:10703-1","openSUSE-SU-2026:21555-1"],"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://cert-portal.siemens.com/productcert/html/ssa-019113.html"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/html/ssa-082556.html"},{"type":"WEB","url":"https://cert-portal.siemens.com/productcert/html/ssa-457936.html"},{"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":"3.16.58"},{"fixed":"3.17"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.4.144"},{"fixed":"4.5"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4.9.102"},{"fixed":"4.10"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5abd1583e06b3963e5c9d915760367de86808b78"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4ba461d426490b6ed7e8298c4d3b7a13aa5d2686"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5a63725cd18fcee2af6ec46ccb856b64ad3077b4"}]}],"versions":["v3.16.85","v3.16.84","v3.16.83","v3.16.82","v3.16.81","v3.16.80","v3.16.79","v3.16.78","v3.16.77","v3.16.76","v3.16.75","v3.16.74","v3.16.73","v3.16.72","v3.16.71","v3.16.70","v3.16.69","v3.16.68","v3.16.67","v3.16.66","v3.16.65","v3.16.64","v3.16.63","v3.16.62","v3.16.61","v3.16.60","v3.16.59","v3.16.58","v4.4.302","v4.4.301","v4.4.300","v4.4.299","v4.4.298","v4.4.297","v4.4.296","v4.4.295","v4.4.294","v4.4.293","v4.4.292","v4.4.291","v4.4.290","v4.4.289","v4.4.288","v4.4.287","v4.4.286","v4.4.285","v4.4.284","v4.4.283","v4.4.282","v4.4.281","v4.4.280","v4.4.279","v4.4.278","v4.4.277","v4.4.276","v4.4.275","v4.4.274","v4.4.273","v4.4.272","v4.4.271","v4.4.270","v4.4.269","v4.4.268","v4.4.267","v4.4.266","v4.4.265","v4.4.264","v4.4.263","v4.4.262","v4.4.261","v4.4.260","v4.4.259","v4.4.258","v4.4.257","v4.4.256","v4.4.255","v4.4.254","v4.4.253","v4.4.252","v4.4.251","v4.4.250","v4.4.249","v4.4.248","v4.4.247","v4.4.246","v4.4.245","v4.4.244","v4.4.243","v4.4.242","v4.4.241","v4.4.240","v4.4.239","v4.4.238","v4.4.237","v4.4.236","v4.4.235","v4.4.234","v4.4.233","v4.4.232","v4.4.231","v4.4.230","v4.4.229","v4.4.228","v4.4.227","v4.4.226","v4.4.225","v4.4.224","v4.4.223","v4.4.222","v4.4.221","v4.4.220","v4.4.219","v4.4.218","v4.4.217","v4.4.216","v4.4.215","v4.4.214","v4.4.213","v4.4.212","v4.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