{"id":"CVE-2021-47567","state":"PUBLISHED","title":"powerpc/32: Fix hardlockup on vmap stack overflow","description":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/32: Fix hardlockup on vmap stack overflow\n\nSince the commit c118c7303ad5 (\"powerpc/32: Fix vmap stack - Do not\nactivate MMU before reading task struct\") a vmap stack overflow\nresults in a hard lockup. This is because emergency_ctx is still\naddressed with its virtual address allthough data MMU is not active\nanymore at that time.\n\nFix it by using a physical address instead.","publishedAt":"2024-05-24T15:12:54.081Z","updatedAt":"2026-05-23T15:20:15.825Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c118c7303ad528be8ff2aea8cd1ee15452c763f0","status":"affected","lessThan":"dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7","versionType":"git"},{"version":"c118c7303ad528be8ff2aea8cd1ee15452c763f0","status":"affected","lessThan":"c4e3ff8b8b1d54f0c755670174c453b06e17114b","versionType":"git"},{"version":"c118c7303ad528be8ff2aea8cd1ee15452c763f0","status":"affected","lessThan":"5bb60ea611db1e04814426ed4bd1c95d1487678e","versionType":"git"},{"version":"3b234b4a6651ed6bdca94553aa0038fc7ded9271","status":"affected","versionType":"git"},{"version":"5.9.5","status":"affected","lessThan":"5.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kernel/head_32.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.83","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.6","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","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/head_32.h"]}],"references":["https://git.kernel.org/stable/c/dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7","https://git.kernel.org/stable/c/c4e3ff8b8b1d54f0c755670174c453b06e17114b","https://git.kernel.org/stable/c/5bb60ea611db1e04814426ed4bd1c95d1487678e"],"weaknesses":[],"ingestedAt":"2026-10-29T19:49:19.404Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/47xxx/CVE-2021-47567.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2021-47567","state":"PUBLISHED","datePublished":"2024-05-24T15:12:54.081Z","dateUpdated":"2026-05-23T15:20:15.825Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-24T15:11:00.728Z"},"containers":{"cna":{"title":"powerpc/32: Fix hardlockup on vmap stack overflow","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/32: Fix hardlockup on vmap stack overflow\n\nSince the commit c118c7303ad5 (\"powerpc/32: Fix vmap stack - Do not\nactivate MMU before reading task struct\") a vmap stack overflow\nresults in a hard lockup. This is because emergency_ctx is still\naddressed with its virtual address allthough data MMU is not active\nanymore at that time.\n\nFix it by using a physical address instead."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c118c7303ad528be8ff2aea8cd1ee15452c763f0","status":"affected","lessThan":"dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7","versionType":"git"},{"version":"c118c7303ad528be8ff2aea8cd1ee15452c763f0","status":"affected","lessThan":"c4e3ff8b8b1d54f0c755670174c453b06e17114b","versionType":"git"},{"version":"c118c7303ad528be8ff2aea8cd1ee15452c763f0","status":"affected","lessThan":"5bb60ea611db1e04814426ed4bd1c95d1487678e","versionType":"git"},{"version":"3b234b4a6651ed6bdca94553aa0038fc7ded9271","status":"affected","versionType":"git"},{"version":"5.9.5","status":"affected","lessThan":"5.10","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/powerpc/kernel/head_32.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.10","versionType":"semver"},{"version":"5.10.83","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.6","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"5.16","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/head_32.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7"},{"url":"https://git.kernel.org/stable/c/c4e3ff8b8b1d54f0c755670174c453b06e17114b"},{"url":"https://git.kernel.org/stable/c/5bb60ea611db1e04814426ed4bd1c95d1487678e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-23T15:20:15.825Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.10.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9.5"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2024-06-17T17:34:28.307539Z","id":"CVE-2021-47567","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-06-17T17:34:41.747Z"}},{"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/c4e3ff8b8b1d54f0c755670174c453b06e17114b","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/5bb60ea611db1e04814426ed4bd1c95d1487678e","tags":["x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-04T05:39:59.830Z"}}]}}}