{"api_version":"1","generated_at":"2026-04-23T18:35:38+00:00","cve":"CVE-2026-31482","urls":{"html":"https://cve.report/CVE-2026-31482","api":"https://cve.report/api/cve/CVE-2026-31482.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31482","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31482"},"summary":{"title":"s390/entry: Scrub r12 register on kernel entry","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-22 14:16:45","updated_at":"2026-04-23 16:17:41"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909","name":"https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27","name":"https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30","name":"https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef","name":"https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36","name":"https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31482","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31482","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 a58d298a83a3a9b7ca99ded9d60a1e77231159ef git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 95c899cd791803a5bf7b73e5994fbbe1cc1a9c36 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 7f4e3233faa8470dd0627bc49b2809f2bfebd909 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 99a8b420f3f0e162eb9c9c9253929d4d23f9bd30 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780 0738d395aab8fae3b5a3ad3fc640630c91693c27 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.131 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.80 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.21 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.19.11 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["arch/s390/kernel/entry.S"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a58d298a83a3a9b7ca99ded9d60a1e77231159ef","status":"affected","version":"f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780","versionType":"git"},{"lessThan":"95c899cd791803a5bf7b73e5994fbbe1cc1a9c36","status":"affected","version":"f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780","versionType":"git"},{"lessThan":"7f4e3233faa8470dd0627bc49b2809f2bfebd909","status":"affected","version":"f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780","versionType":"git"},{"lessThan":"99a8b420f3f0e162eb9c9c9253929d4d23f9bd30","status":"affected","version":"f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780","versionType":"git"},{"lessThan":"0738d395aab8fae3b5a3ad3fc640630c91693c27","status":"affected","version":"f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["arch/s390/kernel/entry.S"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.4"},{"lessThan":"6.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.131","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.80","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.21","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.131","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.80","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.21","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.11","versionStartIncluding":"6.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0","versionStartIncluding":"6.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-04-22T13:54:08.888Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef"},{"url":"https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36"},{"url":"https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909"},{"url":"https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30"},{"url":"https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27"}],"title":"s390/entry: Scrub r12 register on kernel entry","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31482","datePublished":"2026-04-22T13:54:08.888Z","dateReserved":"2026-03-09T15:48:24.101Z","dateUpdated":"2026-04-22T13:54:08.888Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-22 14:16:45","lastModifiedDate":"2026-04-23 16:17:41","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"31482","Ordinal":"1","Title":"s390/entry: Scrub r12 register on kernel entry","CVE":"CVE-2026-31482","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31482","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"s390/entry: Scrub r12 register on kernel entry"}]}}}