{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2021-47428", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47428", "idYear": 2021, "status": "PUBLISHED", "publishedAt": "2024-05-21T15:04:13.910Z", "updatedAt": "2026-05-11T13:54:30.674Z", "importedAt": "2026-10-24T01:56:36.661Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "powerpc/64s: fix program check interrupt emergency stack path", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/64s: fix program check interrupt emergency stack path\n\nEmergency stack path was jumping into a 3: label inside the\n__GEN_COMMON_BODY macro for the normal path after it had finished,\nrather than jumping over it. By a small miracle this is the correct\nplace to build up a new interrupt frame with the existing stack\npointer, so things basically worked okay with an added weird looking\n700 trap frame on top (which had the wrong ->nip so it didn't decode\nbug messages either).\n\nFix this by avoiding using numeric labels when jumping over non-trivial\nmacros.\n\nBefore:\n\n LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV\n Modules linked in:\n CPU: 0 PID: 88 Comm: sh Not tainted 5.15.0-rc2-00034-ge057cdade6e5 #2637\n NIP: 7265677368657265 LR: c00000000006c0c8 CTR: c0000000000097f0\n REGS: c0000000fffb3a50 TRAP: 0700 Not tainted\n MSR: 9000000000021031 CR: 00000700 XER: 20040000\n CFAR: c0000000000098b0 IRQMASK: 0\n GPR00: c00000000006c964 c0000000fffb3cf0 c000000001513800 0000000000000000\n GPR04: 0000000048ab0778 0000000042000000 0000000000000000 0000000000001299\n GPR08: 000001e447c718ec 0000000022424282 0000000000002710 c00000000006bee8\n GPR12: 9000000000009033 c0000000016b0000 00000000000000b0 0000000000000001\n GPR16: 0000000000000000 0000000000000002 0000000000000000 0000000000000ff8\n GPR20: 0000000000001fff 0000000000000007 0000000000000080 00007fff89d90158\n GPR24: 0000000002000000 0000000002000000 0000000000000255 0000000000000300\n GPR28: c000000001270000 0000000042000000 0000000048ab0778 c000000080647e80\n NIP [7265677368657265] 0x7265677368657265\n LR [c00000000006c0c8] ___do_page_fault+0x3f8/0xb10\n Call Trace:\n [c0000000fffb3cf0] [c00000000000bdac] soft_nmi_common+0x13c/0x1d0 (unreliable)\n --- interrupt: 700 at decrementer_common_virt+0xb8/0x230\n NIP: c0000000000098b8 LR: c00000000006c0c8 CTR: c0000000000097f0\n REGS: c0000000fffb3d60 TRAP: 0700 Not tainted\n MSR: 9000000000021031 CR: 22424282 XER: 20040000\n CFAR: c0000000000098b0 IRQMASK: 0\n GPR00: c00000000006c964 0000000000002400 c000000001513800 0000000000000000\n GPR04: 0000000048ab0778 0000000042000000 0000000000000000 0000000000001299\n GPR08: 000001e447c718ec 0000000022424282 0000000000002710 c00000000006bee8\n GPR12: 9000000000009033 c0000000016b0000 00000000000000b0 0000000000000001\n GPR16: 0000000000000000 0000000000000002 0000000000000000 0000000000000ff8\n GPR20: 0000000000001fff 0000000000000007 0000000000000080 00007fff89d90158\n GPR24: 0000000002000000 0000000002000000 0000000000000255 0000000000000300\n GPR28: c000000001270000 0000000042000000 0000000048ab0778 c000000080647e80\n NIP [c0000000000098b8] decrementer_common_virt+0xb8/0x230\n LR [c00000000006c0c8] ___do_page_fault+0x3f8/0xb10\n --- interrupt: 700\n Instruction dump:\n XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n ---[ end trace 6d28218e0cc3c949 ]---\n\nAfter:\n\n ------------[ cut here ]------------\n kernel BUG at arch/powerpc/kernel/exceptions-64s.S:491!\n Oops: Exception in kernel mode, sig: 5 [#1]\n LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV\n Modules linked in:\n CPU: 0 PID: 88 Comm: login Not tainted 5.15.0-rc2-00034-ge057cdade6e5-dirty #2638\n NIP: c0000000000098b8 LR: c00000000006bf04 CTR: c0000000000097f0\n REGS: c0000000fffb3d60 TRAP: 0700 Not tainted\n MSR: 9000000000021031 CR: 24482227 XER: 00040000\n CFAR: c0000000000098b0 IRQMASK: 0\n GPR00: c00000000006bf04 0000000000002400 c000000001513800 c000000001271868\n GPR04: 00000000100f0d29 0000000042000000 0000000000000007 0000000000000009\n GPR08: 00000000100f0d29 0000000024482227 0000000000002710 c000000000181b3c\n GPR12: 9000000000009033 c0000000016b0000 00000000100f0d29 c000000005b22f00\n GPR16: 00000000ffff0000 0000000000000001 0000000000000009 00000000100eed90\n GPR20: 00000000100eed90 00000\n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "0a882e28468f48ab3d9a36dde0a5723ea29ed1ed", "status": "affected", "versionType": "git", "lessThan": "411b38fe68ba20a8bbe724b0939762c3f16e16ca" }, { "version": "0a882e28468f48ab3d9a36dde0a5723ea29ed1ed", "status": "affected", "versionType": "git", "lessThan": "c835b3d1d6362b4a4ebb192da7e7fd27a0a45d01" }, { "version": "0a882e28468f48ab3d9a36dde0a5723ea29ed1ed", "status": "affected", "versionType": "git", "lessThan": "3e607dc4df180b72a38e75030cb0f94d12808712" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.3", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.3" }, { "version": "5.10.73", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.14.12", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.14.*" }, { "version": "5.15", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }