{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49955", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-06-18T10:57:27.382Z", "datePublished": "2025-06-18T11:00:17.617Z", "dateUpdated": "2025-06-18T11:00:17.617Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-06-18T11:00:17.617Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas: Fix RTAS MSR[HV] handling for Cell\n\nThe semi-recent changes to MSR handling when entering RTAS (firmware)\ncause crashes on IBM Cell machines. An example trace:\n\n kernel tried to execute user page (2fff01a8) - exploit attempt? (uid: 0)\n BUG: Unable to handle kernel instruction fetch\n Faulting instruction address: 0x2fff01a8\n Oops: Kernel access of bad area, sig: 11 [#1]\n BE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=4 NUMA Cell\n Modules linked in:\n CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.0.0-rc2-00433-gede0a8d3307a #207\n NIP: 000000002fff01a8 LR: 0000000000032608 CTR: 0000000000000000\n REGS: c0000000015236b0 TRAP: 0400 Tainted: G W (6.0.0-rc2-00433-gede0a8d3307a)\n MSR: 0000000008001002 <ME,RI> CR: 00000000 XER: 20000000\n ...\n NIP 0x2fff01a8\n LR 0x32608\n Call Trace:\n 0xc00000000143c5f8 (unreliable)\n .rtas_call+0x224/0x320\n .rtas_get_boot_time+0x70/0x150\n .read_persistent_clock64+0x114/0x140\n .read_persistent_wall_and_boot_offset+0x24/0x80\n .timekeeping_init+0x40/0x29c\n .start_kernel+0x674/0x8f0\n start_here_common+0x1c/0x50\n\nUnlike PAPR platforms where RTAS is only used in guests, on the IBM Cell\nmachines Linux runs with MSR[HV] set but also uses RTAS, provided by\nSLOF.\n\nFix it by copying the MSR[HV] bit from the MSR value we've just read\nusing mfmsr into the value used for RTAS.\n\nIt seems like we could also fix it using an #ifdef CELL to set MSR[HV],\nbut that doesn't work because it's possible to build a single kernel\nimage that runs on both Cell native and pseries."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/powerpc/kernel/rtas_entry.S"], "versions": [{"version": "b6b1c3ce06ca438eb24e0f45bf0e63ecad0369f5", "lessThan": "8b08d4f97233d8e58fff2fd9d5f86397a49733c5", "status": "affected", "versionType": "git"}, {"version": "b6b1c3ce06ca438eb24e0f45bf0e63ecad0369f5", "lessThan": "91926d8b7e71aaf5f84f0cf208fc5a8b7a761050", "status": "affected", "versionType": "git"}, {"version": "5ca40fcf0da0ce2b5bc44e7d8b036535955f2e3d", "status": "affected", "versionType": "git"}, {"version": "5f4367448f6817c8a0e94dc9736ed84fa8eee4a3", "status": "affected", "versionType": "git"}, {"version": "c9c41f0273826a13ac93124e66a4ff45df281ba0", "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/powerpc/kernel/rtas_entry.S"], "versions": [{"version": "5.19", "status": "affected"}, {"version": "0", "lessThan": "5.19", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.8", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "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": "5.19", "versionEndExcluding": "5.19.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.19", "versionEndExcluding": "6.0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.18.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8b08d4f97233d8e58fff2fd9d5f86397a49733c5"}, {"url": "https://git.kernel.org/stable/c/91926d8b7e71aaf5f84f0cf208fc5a8b7a761050"}], "title": "powerpc/rtas: Fix RTAS MSR[HV] handling for Cell", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas: Fix RTAS MSR[HV] handling for Cell\n\nThe semi-recent changes to MSR handling when entering RTAS (firmware)\ncause crashes on IBM Cell machines. An example trace:\n\n kernel tried to execute user page (2fff01a8) - exploit attempt? (uid: 0)\n BUG: Unable to handle kernel instruction fetch\n Faulting instruction address: 0x2fff01a8\n Oops: Kernel access of bad area, sig: 11 [#1]\n BE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=4 NUMA Cell\n Modules linked in:\n CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.0.0-rc2-00433-gede0a8d3307a #207\n NIP: 000000002fff01a8 LR: 0000000000032608 CTR: 0000000000000000\n REGS: c0000000015236b0 TRAP: 0400 Tainted: G W (6.0.0-rc2-00433-gede0a8d3307a)\n MSR: 0000000008001002 <ME,RI> CR: 00000000 XER: 20000000\n ...\n NIP 0x2fff01a8\n LR 0x32608\n Call Trace:\n 0xc00000000143c5f8 (unreliable)\n .rtas_call+0x224/0x320\n .rtas_get_boot_time+0x70/0x150\n .read_persistent_clock64+0x114/0x140\n .read_persistent_wall_and_boot_offset+0x24/0x80\n .timekeeping_init+0x40/0x29c\n .start_kernel+0x674/0x8f0\n start_here_common+0x1c/0x50\n\nUnlike PAPR platforms where RTAS is only used in guests, on the IBM Cell\nmachines Linux runs with MSR[HV] set but also uses RTAS, provided by\nSLOF.\n\nFix it by copying the MSR[HV] bit from the MSR value we've just read\nusing mfmsr into the value used for RTAS.\n\nIt seems like we could also fix it using an #ifdef CELL to set MSR[HV],\nbut that doesn't work because it's possible to build a single kernel\nimage that runs on both Cell native and pseries."}], "id": "CVE-2022-49955", "lastModified": "2025-06-18T13:46:52.973", "metrics": {}, "published": "2025-06-18T11:15:22.630", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b08d4f97233d8e58fff2fd9d5f86397a49733c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/91926d8b7e71aaf5f84f0cf208fc5a8b7a761050"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: powerpc/rtas: Fix RTAS MSR[HV] handling for Cell", "id": "2373676", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2373676"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-20", "details": ["In the Linux kernel, the following vulnerability has been resolved:\npowerpc/rtas: Fix RTAS MSR[HV] handling for Cell\nThe semi-recent changes to MSR handling when entering RTAS (firmware)\ncause crashes on IBM Cell machines. An example trace:\nkernel tried to execute user page (2fff01a8) - exploit attempt? (uid: 0)\nBUG: Unable to handle kernel instruction fetch\nFaulting instruction address: 0x2fff01a8\nOops: Kernel access of bad area, sig: 11 [#1]\nBE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=4 NUMA Cell\nModules linked in:\nCPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 6.0.0-rc2-00433-gede0a8d3307a #207\nNIP: 000000002fff01a8 LR: 0000000000032608 CTR: 0000000000000000\nREGS: c0000000015236b0 TRAP: 0400 Tainted: G W (6.0.0-rc2-00433-gede0a8d3307a)\nMSR: 0000000008001002 <ME,RI> CR: 00000000 XER: 20000000\n...\nNIP 0x2fff01a8\nLR 0x32608\nCall Trace:\n0xc00000000143c5f8 (unreliable)\n.rtas_call+0x224/0x320\n.rtas_get_boot_time+0x70/0x150\n.read_persistent_clock64+0x114/0x140\n.read_persistent_wall_and_boot_offset+0x24/0x80\n.timekeeping_init+0x40/0x29c\n.start_kernel+0x674/0x8f0\nstart_here_common+0x1c/0x50\nUnlike PAPR platforms where RTAS is only used in guests, on the IBM Cell\nmachines Linux runs with MSR[HV] set but also uses RTAS, provided by\nSLOF.\nFix it by copying the MSR[HV] bit from the MSR value we've just read\nusing mfmsr into the value used for RTAS.\nIt seems like we could also fix it using an #ifdef CELL to set MSR[HV],\nbut that doesn't work because it's possible to build a single kernel\nimage that runs on both Cell native and pseries."], "name": "CVE-2022-49955", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Under investigation", "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": "2025-06-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49955\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49955\nhttps://lore.kernel.org/linux-cve-announce/2025061811-CVE-2022-49955-500b@gregkh/T"], "threat_severity": "Low"}