{"api_version":"1","generated_at":"2026-10-26T08:56:27+00:00","cve":"CVE-2026-98937","urls":{"html":"https://cve.report/CVE-2026-98937","api":"https://cve.report/api/cve/CVE-2026-98937.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98937","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98937"},"summary":{"title":"perf/core: Check kernel access when kernel callchains are requested","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Check kernel access when kernel callchains are requested\n\nperf_event_open() currently gates perf_allow_kernel() only on\n!attr.exclude_kernel.\n\nHowever, users can still request kernel callchain collection with\nattr.exclude_callchain_kernel == 0 even when attr.exclude_kernel == 1.\nThat still requires kernel profiling privilege, but the existing check\ndoes not enforce it.\n\nUpdate the permission check to call perf_allow_kernel() when either\nkernel sampling is requested or kernel callchains are requested.\n\nThis keeps permission checks aligned with requested data and prevents\nunprivileged use of kernel callchain capture.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-23 13:17:14","updated_at":"2026-10-26 07:17:17"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/a4573a3838ae4fc73b70019cfa1dac9aaea7cc2f","name":"https://git.kernel.org/stable/c/a4573a3838ae4fc73b70019cfa1dac9aaea7cc2f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2581b43e162cfc43e6f5d8dd8d2b38f3441550de","name":"https://git.kernel.org/stable/c/2581b43e162cfc43e6f5d8dd8d2b38f3441550de","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6e187281f978a2bff98ead6aa40f8ddc9a2c9afb","name":"https://git.kernel.org/stable/c/6e187281f978a2bff98ead6aa40f8ddc9a2c9afb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/132bee76097be421ab3012130b5b506324cf2be1","name":"https://git.kernel.org/stable/c/132bee76097be421ab3012130b5b506324cf2be1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98937","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98937","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0764771dab80d7b84b9a271bee7f1b21a04a3f0c 132bee76097be421ab3012130b5b506324cf2be1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0764771dab80d7b84b9a271bee7f1b21a04a3f0c 2581b43e162cfc43e6f5d8dd8d2b38f3441550de git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0764771dab80d7b84b9a271bee7f1b21a04a3f0c 6e187281f978a2bff98ead6aa40f8ddc9a2c9afb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 0764771dab80d7b84b9a271bee7f1b21a04a3f0c a4573a3838ae4fc73b70019cfa1dac9aaea7cc2f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.31","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.31 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.56 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.10 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * 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":["kernel/events/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"132bee76097be421ab3012130b5b506324cf2be1","status":"affected","version":"0764771dab80d7b84b9a271bee7f1b21a04a3f0c","versionType":"git"},{"lessThan":"2581b43e162cfc43e6f5d8dd8d2b38f3441550de","status":"affected","version":"0764771dab80d7b84b9a271bee7f1b21a04a3f0c","versionType":"git"},{"lessThan":"6e187281f978a2bff98ead6aa40f8ddc9a2c9afb","status":"affected","version":"0764771dab80d7b84b9a271bee7f1b21a04a3f0c","versionType":"git"},{"lessThan":"a4573a3838ae4fc73b70019cfa1dac9aaea7cc2f","status":"affected","version":"0764771dab80d7b84b9a271bee7f1b21a04a3f0c","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/events/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.31"},{"lessThan":"2.6.31","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.56","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"2.6.31","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.56","versionStartIncluding":"2.6.31","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.10","versionStartIncluding":"2.6.31","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"2.6.31","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Check kernel access when kernel callchains are requested\n\nperf_event_open() currently gates perf_allow_kernel() only on\n!attr.exclude_kernel.\n\nHowever, users can still request kernel callchain collection with\nattr.exclude_callchain_kernel == 0 even when attr.exclude_kernel == 1.\nThat still requires kernel profiling privilege, but the existing check\ndoes not enforce it.\n\nUpdate the permission check to call perf_allow_kernel() when either\nkernel sampling is requested or kernel callchains are requested.\n\nThis keeps permission checks aligned with requested data and prevents\nunprivileged use of kernel callchain capture."}],"providerMetadata":{"dateUpdated":"2026-10-26T06:56:51.396Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/132bee76097be421ab3012130b5b506324cf2be1"},{"url":"https://git.kernel.org/stable/c/2581b43e162cfc43e6f5d8dd8d2b38f3441550de"},{"url":"https://git.kernel.org/stable/c/6e187281f978a2bff98ead6aa40f8ddc9a2c9afb"},{"url":"https://git.kernel.org/stable/c/a4573a3838ae4fc73b70019cfa1dac9aaea7cc2f"}],"title":"perf/core: Check kernel access when kernel callchains are requested","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98937","datePublished":"2026-10-23T12:11:53.327Z","dateReserved":"2026-09-25T10:25:14.381Z","dateUpdated":"2026-10-26T06:56:51.396Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-23 13:17:14","lastModifiedDate":"2026-10-26 07:17:17","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98937","Ordinal":"1","Title":"perf/core: Check kernel access when kernel callchains are reques","CVE":"CVE-2026-98937","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98937","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Check kernel access when kernel callchains are requested\n\nperf_event_open() currently gates perf_allow_kernel() only on\n!attr.exclude_kernel.\n\nHowever, users can still request kernel callchain collection with\nattr.exclude_callchain_kernel == 0 even when attr.exclude_kernel == 1.\nThat still requires kernel profiling privilege, but the existing check\ndoes not enforce it.\n\nUpdate the permission check to call perf_allow_kernel() when either\nkernel sampling is requested or kernel callchains are requested.\n\nThis keeps permission checks aligned with requested data and prevents\nunprivileged use of kernel callchain capture.","Type":"Description","Title":"perf/core: Check kernel access when kernel callchains are reques"}]}}}