{ "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-2022-49440", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49440", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-02-26T02:12:53.988Z", "updatedAt": "2026-05-11T18:59:51.690Z", "importedAt": "2026-10-24T01:56:49.724Z", "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/rtas: Keep MSR[RI] set when calling RTAS", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas: Keep MSR[RI] set when calling RTAS\n\nRTAS runs in real mode (MSR[DR] and MSR[IR] unset) and in 32-bit big\nendian mode (MSR[SF,LE] unset).\n\nThe change in MSR is done in enter_rtas() in a relatively complex way,\nsince the MSR value could be hardcoded.\n\nFurthermore, a panic has been reported when hitting the watchdog interrupt\nwhile running in RTAS, this leads to the following stack trace:\n\n watchdog: CPU 24 Hard LOCKUP\n watchdog: CPU 24 TB:997512652051031, last heartbeat TB:997504470175378 (15980ms ago)\n ...\n Supported: No, Unreleased kernel\n CPU: 24 PID: 87504 Comm: drmgr Kdump: loaded Tainted: G E X 5.14.21-150400.71.1.bz196362_2-default #1 SLE15-SP4 (unreleased) 0d821077ef4faa8dfaf370efb5fdca1fa35f4e2c\n NIP: 000000001fb41050 LR: 000000001fb4104c CTR: 0000000000000000\n REGS: c00000000fc33d60 TRAP: 0100 Tainted: G E X (5.14.21-150400.71.1.bz196362_2-default)\n MSR: 8000000002981000 CR: 48800002 XER: 20040020\n CFAR: 000000000000011c IRQMASK: 1\n GPR00: 0000000000000003 ffffffffffffffff 0000000000000001 00000000000050dc\n GPR04: 000000001ffb6100 0000000000000020 0000000000000001 000000001fb09010\n GPR08: 0000000020000000 0000000000000000 0000000000000000 0000000000000000\n GPR12: 80040000072a40a8 c00000000ff8b680 0000000000000007 0000000000000034\n GPR16: 000000001fbf6e94 000000001fbf6d84 000000001fbd1db0 000000001fb3f008\n GPR20: 000000001fb41018 ffffffffffffffff 000000000000017f fffffffffffff68f\n GPR24: 000000001fb18fe8 000000001fb3e000 000000001fb1adc0 000000001fb1cf40\n GPR28: 000000001fb26000 000000001fb460f0 000000001fb17f18 000000001fb17000\n NIP [000000001fb41050] 0x1fb41050\n LR [000000001fb4104c] 0x1fb4104c\n Call Trace:\n Instruction dump:\n XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n Oops: Unrecoverable System Reset, sig: 6 [#1]\n LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries\n ...\n Supported: No, Unreleased kernel\n CPU: 24 PID: 87504 Comm: drmgr Kdump: loaded Tainted: G E X 5.14.21-150400.71.1.bz196362_2-default #1 SLE15-SP4 (unreleased) 0d821077ef4faa8dfaf370efb5fdca1fa35f4e2c\n NIP: 000000001fb41050 LR: 000000001fb4104c CTR: 0000000000000000\n REGS: c00000000fc33d60 TRAP: 0100 Tainted: G E X (5.14.21-150400.71.1.bz196362_2-default)\n MSR: 8000000002981000 CR: 48800002 XER: 20040020\n CFAR: 000000000000011c IRQMASK: 1\n GPR00: 0000000000000003 ffffffffffffffff 0000000000000001 00000000000050dc\n GPR04: 000000001ffb6100 0000000000000020 0000000000000001 000000001fb09010\n GPR08: 0000000020000000 0000000000000000 0000000000000000 0000000000000000\n GPR12: 80040000072a40a8 c00000000ff8b680 0000000000000007 0000000000000034\n GPR16: 000000001fbf6e94 000000001fbf6d84 000000001fbd1db0 000000001fb3f008\n GPR20: 000000001fb41018 ffffffffffffffff 000000000000017f fffffffffffff68f\n GPR24: 000000001fb18fe8 000000001fb3e000 000000001fb1adc0 000000001fb1cf40\n GPR28: 000000001fb26000 000000001fb460f0 000000001fb17f18 000000001fb17000\n NIP [000000001fb41050] 0x1fb41050\n LR [000000001fb4104c] 0x1fb4104c\n Call Trace:\n Instruction dump:\n XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX\n ---[ end trace 3ddec07f638c34a2 ]---\n\nThis happens because MSR[RI] is unset when entering RTAS but there is no\nvalid reason to not set it here.\n\nRTAS is expected to be called with MSR[RI] as specified in PAPR+ section\n\"7.2.1 Machine State\":\n\n R1–7.2.1–9. If called with MSR[RI] equal to 1, then RTAS must protect\n its own critical regions from recursion by setting the MSR[RI] bit to\n 0 when in the critical regions.\n\nFixing this by reviewing the way MSR is compute before calling RTAS. Now a\nhardcoded value meaning real \n---truncated---", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "44c9f3cc1a07503b653b571eac5792436da39a30", "status": "affected", "versionType": "git", "lessThan": "5ca40fcf0da0ce2b5bc44e7d8b036535955f2e3d" }, { "version": "44c9f3cc1a07503b653b571eac5792436da39a30", "status": "affected", "versionType": "git", "lessThan": "5f4367448f6817c8a0e94dc9736ed84fa8eee4a3" }, { "version": "44c9f3cc1a07503b653b571eac5792436da39a30", "status": "affected", "versionType": "git", "lessThan": "c9c41f0273826a13ac93124e66a4ff45df281ba0" }, { "version": "44c9f3cc1a07503b653b571eac5792436da39a30", "status": "affected", "versionType": "git", "lessThan": "b6b1c3ce06ca438eb24e0f45bf0e63ecad0369f5" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "2.6.34", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "2.6.34" }, { "version": "5.15.46", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.17.14", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.17.*" }, { "version": "5.18.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.18.*" }, { "version": "5.19", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }