{"api_version":"1","generated_at":"2026-08-31T20:53:35+00:00","cve":"CVE-2026-80623","urls":{"html":"https://cve.report/CVE-2026-80623","api":"https://cve.report/api/cve/CVE-2026-80623.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80623","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80623"},"summary":{"title":"coresight: ete: Always save state on power down","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ete: Always save state on power down\n\nSystem register ETMs and ETE are unlikely to be preserved on CPU power\ndown. The ETE DT binding also never documented\n\"arm,coresight-loses-context-with-cpu\" so nobody would have legitimately\nbeen able to use that binding to fix it and ACPI has no such binding at\nall.\n\nFix it by hard coding the setting for sysreg ETMs (ETE is always sysreg)\nor ACPI boots. Use a local variable when setting up save_state so that\nit's immune to concurrent probing when devices have different\nconfigurations which is an issue with modifying the global.\n\nThis fixes the following error when using Coresight with ACPI on the FVP\nwhich supports CPU PM:\n\n  coresight ete0: External agent took claim tag\n  WARNING: drivers/hwtracing/coresight/coresight-core.c:248 at coresight_disclaim_device_unlocked+0xe0/0xe8, CPU#0: perf/117","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-28 08:16:46","updated_at":"2026-08-28 08:16:46"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/65d87f28daec31903fc39fee0744f7a0059c19f2","name":"https://git.kernel.org/stable/c/65d87f28daec31903fc39fee0744f7a0059c19f2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2ab4645fe4206c142a5f1491e191c906279686cf","name":"https://git.kernel.org/stable/c/2ab4645fe4206c142a5f1491e191c906279686cf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/293dacd5b6a9f1275d92ca6c4fd874e54b2c8319","name":"https://git.kernel.org/stable/c/293dacd5b6a9f1275d92ca6c4fd874e54b2c8319","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80623","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80623","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 35e1c9163e025855f23a68f2470c471509e5d779 65d87f28daec31903fc39fee0744f7a0059c19f2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 35e1c9163e025855f23a68f2470c471509e5d779 293dacd5b6a9f1275d92ca6c4fd874e54b2c8319 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 35e1c9163e025855f23a68f2470c471509e5d779 2ab4645fe4206c142a5f1491e191c906279686cf git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80623","cve":"CVE-2026-80623","epss":"0.001660000","percentile":"0.060860000","score_date":"2026-08-30","updated_at":"2026-08-31 00:14:06"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/hwtracing/coresight/coresight-etm4x-core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"65d87f28daec31903fc39fee0744f7a0059c19f2","status":"affected","version":"35e1c9163e025855f23a68f2470c471509e5d779","versionType":"git"},{"lessThan":"293dacd5b6a9f1275d92ca6c4fd874e54b2c8319","status":"affected","version":"35e1c9163e025855f23a68f2470c471509e5d779","versionType":"git"},{"lessThan":"2ab4645fe4206c142a5f1491e191c906279686cf","status":"affected","version":"35e1c9163e025855f23a68f2470c471509e5d779","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/hwtracing/coresight/coresight-etm4x-core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ete: Always save state on power down\n\nSystem register ETMs and ETE are unlikely to be preserved on CPU power\ndown. The ETE DT binding also never documented\n\"arm,coresight-loses-context-with-cpu\" so nobody would have legitimately\nbeen able to use that binding to fix it and ACPI has no such binding at\nall.\n\nFix it by hard coding the setting for sysreg ETMs (ETE is always sysreg)\nor ACPI boots. Use a local variable when setting up save_state so that\nit's immune to concurrent probing when devices have different\nconfigurations which is an issue with modifying the global.\n\nThis fixes the following error when using Coresight with ACPI on the FVP\nwhich supports CPU PM:\n\n  coresight ete0: External agent took claim tag\n  WARNING: drivers/hwtracing/coresight/coresight-core.c:248 at coresight_disclaim_device_unlocked+0xe0/0xe8, CPU#0: perf/117"}],"providerMetadata":{"dateUpdated":"2026-08-28T06:48:42.371Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/65d87f28daec31903fc39fee0744f7a0059c19f2"},{"url":"https://git.kernel.org/stable/c/293dacd5b6a9f1275d92ca6c4fd874e54b2c8319"},{"url":"https://git.kernel.org/stable/c/2ab4645fe4206c142a5f1491e191c906279686cf"}],"title":"coresight: ete: Always save state on power down","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80623","datePublished":"2026-08-28T06:48:42.371Z","dateReserved":"2026-08-26T14:34:25.775Z","dateUpdated":"2026-08-28T06:48:42.371Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 08:16:46","lastModifiedDate":"2026-08-28 08:16:46","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80623","Ordinal":"1","Title":"coresight: ete: Always save state on power down","CVE":"CVE-2026-80623","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80623","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ete: Always save state on power down\n\nSystem register ETMs and ETE are unlikely to be preserved on CPU power\ndown. The ETE DT binding also never documented\n\"arm,coresight-loses-context-with-cpu\" so nobody would have legitimately\nbeen able to use that binding to fix it and ACPI has no such binding at\nall.\n\nFix it by hard coding the setting for sysreg ETMs (ETE is always sysreg)\nor ACPI boots. Use a local variable when setting up save_state so that\nit's immune to concurrent probing when devices have different\nconfigurations which is an issue with modifying the global.\n\nThis fixes the following error when using Coresight with ACPI on the FVP\nwhich supports CPU PM:\n\n  coresight ete0: External agent took claim tag\n  WARNING: drivers/hwtracing/coresight/coresight-core.c:248 at coresight_disclaim_device_unlocked+0xe0/0xe8, CPU#0: perf/117","Type":"Description","Title":"coresight: ete: Always save state on power down"}]}}}