{"id":"CVE-2022-50870","state":"PUBLISHED","title":"powerpc/rtas: avoid device tree lookups in rtas_os_term()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas: avoid device tree lookups in rtas_os_term()\n\nrtas_os_term() is called during panic. Its behavior depends on a couple\nof conditions in the /rtas node of the device tree, the traversal of\nwhich entails locking and local IRQ state changes. If the kernel panics\nwhile devtree_lock is held, rtas_os_term() as currently written could\nhang.\n\nInstead of discovering the relevant characteristics at panic time,\ncache them in file-static variables at boot. Note the lookup for\n\"ibm,extended-os-term\" is converted to of_property_read_bool() since it\nis a boolean property, not an RTAS function token.\n\n[mpe: Incorporate suggested change from Nick]","publishedAt":"2025-12-30T12:15:40.718Z","updatedAt":"2026-05-11T19:26:43.134Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"e23822c7381c59d9e42e65771b6e17c71ed30ea7","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"06a07fbb32b3a23eec20a42b1e64474da0a3b33e","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"c2fa91abf22a705cf02f886cd99cff41f4ceda60","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"f2167f10fcca68ab9ae3f8d94d2c704c5541ac69","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"d8939315b7342860df143afe0adda6212cdd3193","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"698e682c849e356fb47a8be47ca8baa817cf31e0","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"464d10e8d797454e16a173ef1292a446b2adf21c","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"ed2213bfb192ab51f09f12e9b49b5d482c6493f3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kernel/rtas.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.16","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.87","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.17","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.3","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kernel/rtas.c"]}],"references":["https://git.kernel.org/stable/c/e23822c7381c59d9e42e65771b6e17c71ed30ea7","https://git.kernel.org/stable/c/06a07fbb32b3a23eec20a42b1e64474da0a3b33e","https://git.kernel.org/stable/c/c2fa91abf22a705cf02f886cd99cff41f4ceda60","https://git.kernel.org/stable/c/f2167f10fcca68ab9ae3f8d94d2c704c5541ac69","https://git.kernel.org/stable/c/d8939315b7342860df143afe0adda6212cdd3193","https://git.kernel.org/stable/c/698e682c849e356fb47a8be47ca8baa817cf31e0","https://git.kernel.org/stable/c/464d10e8d797454e16a173ef1292a446b2adf21c","https://git.kernel.org/stable/c/ed2213bfb192ab51f09f12e9b49b5d482c6493f3"],"weaknesses":[],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/50xxx/CVE-2022-50870.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-50870","state":"PUBLISHED","datePublished":"2025-12-30T12:15:40.718Z","dateUpdated":"2026-05-11T19:26:43.134Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-12-30T12:06:07.136Z"},"containers":{"cna":{"title":"powerpc/rtas: avoid device tree lookups in rtas_os_term()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/rtas: avoid device tree lookups in rtas_os_term()\n\nrtas_os_term() is called during panic. Its behavior depends on a couple\nof conditions in the /rtas node of the device tree, the traversal of\nwhich entails locking and local IRQ state changes. If the kernel panics\nwhile devtree_lock is held, rtas_os_term() as currently written could\nhang.\n\nInstead of discovering the relevant characteristics at panic time,\ncache them in file-static variables at boot. Note the lookup for\n\"ibm,extended-os-term\" is converted to of_property_read_bool() since it\nis a boolean property, not an RTAS function token.\n\n[mpe: Incorporate suggested change from Nick]"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"e23822c7381c59d9e42e65771b6e17c71ed30ea7","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"06a07fbb32b3a23eec20a42b1e64474da0a3b33e","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"c2fa91abf22a705cf02f886cd99cff41f4ceda60","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"f2167f10fcca68ab9ae3f8d94d2c704c5541ac69","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"d8939315b7342860df143afe0adda6212cdd3193","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"698e682c849e356fb47a8be47ca8baa817cf31e0","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"464d10e8d797454e16a173ef1292a446b2adf21c","versionType":"git"},{"version":"088186ded490ced80758200cf8f906ed741df306","status":"affected","lessThan":"ed2213bfb192ab51f09f12e9b49b5d482c6493f3","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kernel/rtas.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.16","versionType":"semver"},{"version":"4.14.303","status":"unaffected","lessThanOrEqual":"4.14.*","versionType":"semver"},{"version":"4.19.270","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.229","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.163","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.87","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.0.17","status":"unaffected","lessThanOrEqual":"6.0.*","versionType":"semver"},{"version":"6.1.3","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kernel/rtas.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/e23822c7381c59d9e42e65771b6e17c71ed30ea7"},{"url":"https://git.kernel.org/stable/c/06a07fbb32b3a23eec20a42b1e64474da0a3b33e"},{"url":"https://git.kernel.org/stable/c/c2fa91abf22a705cf02f886cd99cff41f4ceda60"},{"url":"https://git.kernel.org/stable/c/f2167f10fcca68ab9ae3f8d94d2c704c5541ac69"},{"url":"https://git.kernel.org/stable/c/d8939315b7342860df143afe0adda6212cdd3193"},{"url":"https://git.kernel.org/stable/c/698e682c849e356fb47a8be47ca8baa817cf31e0"},{"url":"https://git.kernel.org/stable/c/464d10e8d797454e16a173ef1292a446b2adf21c"},{"url":"https://git.kernel.org/stable/c/ed2213bfb192ab51f09f12e9b49b5d482c6493f3"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:26:43.134Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.14.303"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"4.19.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.4.229"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.10.163"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"5.15.87"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.0.17"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.1.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.16","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}