{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31482", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.101Z", "datePublished": "2026-04-22T13:54:08.888Z", "dateUpdated": "2026-04-22T13:54:08.888Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-22T13:54:08.888Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/kernel/entry.S"], "versions": [{"version": "f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780", "lessThan": "a58d298a83a3a9b7ca99ded9d60a1e77231159ef", "status": "affected", "versionType": "git"}, {"version": "f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780", "lessThan": "95c899cd791803a5bf7b73e5994fbbe1cc1a9c36", "status": "affected", "versionType": "git"}, {"version": "f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780", "lessThan": "7f4e3233faa8470dd0627bc49b2809f2bfebd909", "status": "affected", "versionType": "git"}, {"version": "f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780", "lessThan": "99a8b420f3f0e162eb9c9c9253929d4d23f9bd30", "status": "affected", "versionType": "git"}, {"version": "f33f2d4c7c80c641f6ca3dfe5e7dfe1f91543780", "lessThan": "0738d395aab8fae3b5a3ad3fc640630c91693c27", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/s390/kernel/entry.S"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.131", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.80", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.11", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.6.131"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.19.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.0"}]}]}], "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-31482", "lastModified": "2026-04-23T16:17:41.280", "metrics": {}, "published": "2026-04-22T14:16:45.457", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0738d395aab8fae3b5a3ad3fc640630c91693c27"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7f4e3233faa8470dd0627bc49b2809f2bfebd909"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/95c899cd791803a5bf7b73e5994fbbe1cc1a9c36"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/99a8b420f3f0e162eb9c9c9253929d4d23f9bd30"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a58d298a83a3a9b7ca99ded9d60a1e77231159ef"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: s390/entry: Scrub r12 register on kernel entry", "id": "2460705", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460705"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-909", "details": ["A flaw was found in the Linux kernel, specifically within the s390 architecture's kernel entry process. Due to an incomplete update, a critical register (r12) was not properly cleared when entering the kernel. This oversight could allow a local user to potentially access sensitive system information, such as the current task pointer, which should not be exposed."], "name": "CVE-2026-31482", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31482\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31482\nhttps://lore.kernel.org/linux-cve-announce/2026042258-CVE-2026-31482-b482@gregkh/T"], "threat_severity": "Moderate"}