{"api_version":"1","generated_at":"2026-10-01T23:19:07+00:00","cve":"CVE-2026-90272","urls":{"html":"https://cve.report/CVE-2026-90272","api":"https://cve.report/api/cve/CVE-2026-90272.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90272","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90272"},"summary":{"title":"perf: arm_pmuv3: Zero initialize hw_id branch stack field","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf: arm_pmuv3: Zero initialize hw_id branch stack field\n\nPERF_SAMPLE_BRANCH_HW_INDEX is supported by BRBE so hw_id is passed to\nuserspace, but it's never set by the BRBE driver. Zero initialize it as\nit should be according to the docs:\n\n   * For the architectures whose raw branch records are\n   * already stored in age order, the hw_idx should be 0.\n\nIt's probably too risky to remove PERF_SAMPLE_BRANCH_HW_INDEX from BRBE\nnow in case anyone is setting it and reading the value, but zero\ninitializing the whole struct also protects against the same issue with\nnew fields that are added in the future.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:23","updated_at":"2026-09-17 17:17:23"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/57b72442c1672963fd51ab441ca1b71f6dc79b66","name":"https://git.kernel.org/stable/c/57b72442c1672963fd51ab441ca1b71f6dc79b66","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7c3b63386c27bed8d59a4b4c283d02860420eb0a","name":"https://git.kernel.org/stable/c/7c3b63386c27bed8d59a4b4c283d02860420eb0a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/988e11b69ef9d4034e19c64407030fa948580c3d","name":"https://git.kernel.org/stable/c/988e11b69ef9d4034e19c64407030fa948580c3d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90272","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90272","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f 57b72442c1672963fd51ab441ca1b71f6dc79b66 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f 988e11b69ef9d4034e19c64407030fa948580c3d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f 7c3b63386c27bed8d59a4b4c283d02860420eb0a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/perf/arm_pmuv3.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"57b72442c1672963fd51ab441ca1b71f6dc79b66","status":"affected","version":"58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f","versionType":"git"},{"lessThan":"988e11b69ef9d4034e19c64407030fa948580c3d","status":"affected","version":"58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f","versionType":"git"},{"lessThan":"7c3b63386c27bed8d59a4b4c283d02860420eb0a","status":"affected","version":"58074a0fce66c6c97b35ce8a28ed4e7b780f9a8f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/perf/arm_pmuv3.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.17"},{"lessThan":"6.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.17","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf: arm_pmuv3: Zero initialize hw_id branch stack field\n\nPERF_SAMPLE_BRANCH_HW_INDEX is supported by BRBE so hw_id is passed to\nuserspace, but it's never set by the BRBE driver. Zero initialize it as\nit should be according to the docs:\n\n   * For the architectures whose raw branch records are\n   * already stored in age order, the hw_idx should be 0.\n\nIt's probably too risky to remove PERF_SAMPLE_BRANCH_HW_INDEX from BRBE\nnow in case anyone is setting it and reading the value, but zero\ninitializing the whole struct also protects against the same issue with\nnew fields that are added in the future."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:08:05.965Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/57b72442c1672963fd51ab441ca1b71f6dc79b66"},{"url":"https://git.kernel.org/stable/c/988e11b69ef9d4034e19c64407030fa948580c3d"},{"url":"https://git.kernel.org/stable/c/7c3b63386c27bed8d59a4b4c283d02860420eb0a"}],"title":"perf: arm_pmuv3: Zero initialize hw_id branch stack field","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90272","datePublished":"2026-09-17T16:08:05.965Z","dateReserved":"2026-09-11T19:38:34.797Z","dateUpdated":"2026-09-17T16:08:05.965Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:23","lastModifiedDate":"2026-09-17 17:17:23","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90272","Ordinal":"1","Title":"perf: arm_pmuv3: Zero initialize hw_id branch stack field","CVE":"CVE-2026-90272","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90272","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf: arm_pmuv3: Zero initialize hw_id branch stack field\n\nPERF_SAMPLE_BRANCH_HW_INDEX is supported by BRBE so hw_id is passed to\nuserspace, but it's never set by the BRBE driver. Zero initialize it as\nit should be according to the docs:\n\n   * For the architectures whose raw branch records are\n   * already stored in age order, the hw_idx should be 0.\n\nIt's probably too risky to remove PERF_SAMPLE_BRANCH_HW_INDEX from BRBE\nnow in case anyone is setting it and reading the value, but zero\ninitializing the whole struct also protects against the same issue with\nnew fields that are added in the future.","Type":"Description","Title":"perf: arm_pmuv3: Zero initialize hw_id branch stack field"}]}}}