{"id":"CVE-2026-31482","summary":"s390/entry: Scrub r12 register on kernel entry","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/entry: Scrub r12 register on kernel entry\n\nBefore commit f33f2d4c7c80 (\"s390/bp: remove TIF_ISOLATE_BP\"),\nall entry handlers loaded r12 with the current task pointer\n(lg %r12,__LC_CURRENT) for use by the BPENTER/BPEXIT macros. That\ncommit removed TIF_ISOLATE_BP, dropping both the branch prediction\nmacros and the r12 load, but did not add r12 to the register clearing\nsequence.\n\nAdd the missing xgr %r12,%r12 to make the register scrub consistent\nacross all entry points.","modified":"2026-06-18T03:56:22.444567918Z","published":"2026-04-22T13:54:08.888Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31482.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909"},{"type":"WEB","url":"https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36"},{"type":"WEB","url":"https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31482.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31482"},{"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":"f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780"},{"fixed":"a58d298a83a3a9b7ca99ded9d60a1e77231159ef"},{"fixed":"95c899cd791803a5bf7b73e5994fbbe1cc1a9c36"},{"fixed":"7f4e3233faa8470dd0627bc49b2809f2bfebd909"},{"fixed":"99a8b420f3f0e162eb9c9c9253929d4d23f9bd30"},{"fixed":"0738d395aab8fae3b5a3ad3fc640630c91693c27"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31482.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.4.0"},{"fixed":"6.6.131"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.80"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.21"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-31482.json"}}],"schema_version":"1.7.5"}