CVE-2026-97960

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97960", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:18:58.206Z", "datePublished": "2026-09-25T10:23:04.943Z", "dateUpdated": "2026-10-21T12:53:50.943Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:53:50.943Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel: Prevent drain_pebs() reentry\n\nThe PEBS buffer is shared by all events on a CPU, so drain_pebs() must\nnot be reentered. If so, one instance may observe stale buffer state and\npotentially access out-of-bound memory.\n\nMost invocations happen in NMI context, which naturally prevents reentry.\nHowever, drain_pebs() is also reachable from process context via\nintel_pmu_drain_pebs_buffer().\n\nIn those paths, the PMU is often already disabled, but not guaranteed.\nFor example, __intel_pmu_pebs_disable() only disables the target counter,\nso other active counters can still raise a PMI and interrupt an in-flight\ndrain_pebs(). Here is an example,\n\n__perf_addr_filters_adjust()\n perf_event_stop()\n __perf_event_stop()\n x86_pmu_stop() (event->pmu->stop)\n intel_pmu_disable_event()\n intel_pmu_pebs_disable()\n __intel_pmu_pebs_disable()\n intel_pmu_drain_large_pebs()\n intel_pmu_drain_pebs_buffer()\n\nIntroduce __intel_pmu_quiesce() and __intel_pmu_resume() helpers and\nuse them in intel_pmu_drain_large_pebs() to disable the full PMU\naround the intel_pmu_drain_pebs_buffer() call, preventing reentry.\n\nAlso add a warning in intel_pmu_drain_pebs_buffer() when the full PMU is\nnot disabled."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/events/intel/core.c", "arch/x86/events/intel/ds.c", "arch/x86/events/perf_event.h"], "versions": [{"version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "lessThan": "9882068ed242fcd4743f53027e8c790e88dcafff", "status": "affected", "versionType": "git"}, {"version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "lessThan": "999e482fdf89400cc1ae937680fc05096b4c915b", "status": "affected", "versionType": "git"}, {"version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "lessThan": "a5fe19dd8b3ed5fad6e5e0f0c58c7245043ee4af", "status": "affected", "versionType": "git"}, {"version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "lessThan": "c55599c0ec2aa020e41a0599c3044c56d8a2e7d9", "status": "affected", "versionType": "git"}, {"version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "lessThan": "a56c03a397e2cd0c4cf8da96dcd6214f7d0e7d8c", "status": "affected", "versionType": "git"}, {"version": "a9165207b2b07415eeb01b3ac8bb84976ec96984", "status": "affected", "versionType": "git"}, {"version": "6.3.7", "lessThan": "6.4", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/x86/events/intel/core.c", "arch/x86/events/intel/ds.c", "arch/x86/events/perf_event.h"], "versions": [{"version": "6.4", "status": "affected"}, {"version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.7", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12.114"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "7.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3.7"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9882068ed242fcd4743f53027e8c790e88dcafff"}, {"url": "https://git.kernel.org/stable/c/999e482fdf89400cc1ae937680fc05096b4c915b"}, {"url": "https://git.kernel.org/stable/c/a5fe19dd8b3ed5fad6e5e0f0c58c7245043ee4af"}, {"url": "https://git.kernel.org/stable/c/c55599c0ec2aa020e41a0599c3044c56d8a2e7d9"}, {"url": "https://git.kernel.org/stable/c/a56c03a397e2cd0c4cf8da96dcd6214f7d0e7d8c"}], "title": "perf/x86/intel: Prevent drain_pebs() reentry", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/x86/events/intel/core.c", "arch/x86/events/intel/ds.c", "arch/x86/events/perf_event.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "9882068ed242fcd4743f53027e8c790e88dcafff", "status": "affected", "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "versionType": "git"}, {"lessThan": "999e482fdf89400cc1ae937680fc05096b4c915b", "status": "affected", "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "versionType": "git"}, {"lessThan": "a5fe19dd8b3ed5fad6e5e0f0c58c7245043ee4af", "status": "affected", "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "versionType": "git"}, {"lessThan": "c55599c0ec2aa020e41a0599c3044c56d8a2e7d9", "status": "affected", "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "versionType": "git"}, {"lessThan": "a56c03a397e2cd0c4cf8da96dcd6214f7d0e7d8c", "status": "affected", "version": "b752ea0c28e3f7f0aaaad6abf84f735eebc37a60", "versionType": "git"}, {"status": "affected", "version": "a9165207b2b07415eeb01b3ac8bb84976ec96984", "versionType": "git"}, {"lessThan": "6.4", "status": "affected", "version": "6.3.7", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/x86/events/intel/core.c", "arch/x86/events/intel/ds.c", "arch/x86/events/perf_event.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.4"}, {"lessThan": "6.4", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.114", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.53", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.7", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86/intel: Prevent drain_pebs() reentry\n\nThe PEBS buffer is shared by all events on a CPU, so drain_pebs() must\nnot be reentered. If so, one instance may observe stale buffer state and\npotentially access out-of-bound memory.\n\nMost invocations happen in NMI context, which naturally prevents reentry.\nHowever, drain_pebs() is also reachable from process context via\nintel_pmu_drain_pebs_buffer().\n\nIn those paths, the PMU is often already disabled, but not guaranteed.\nFor example, __intel_pmu_pebs_disable() only disables the target counter,\nso other active counters can still raise a PMI and interrupt an in-flight\ndrain_pebs(). Here is an example,\n\n__perf_addr_filters_adjust()\n perf_event_stop()\n __perf_event_stop()\n x86_pmu_stop() (event->pmu->stop)\n intel_pmu_disable_event()\n intel_pmu_pebs_disable()\n __intel_pmu_pebs_disable()\n intel_pmu_drain_large_pebs()\n intel_pmu_drain_pebs_buffer()\n\nIntroduce __intel_pmu_quiesce() and __intel_pmu_resume() helpers and\nuse them in intel_pmu_drain_large_pebs() to disable the full PMU\naround the intel_pmu_drain_pebs_buffer() call, preventing reentry.\n\nAlso add a warning in intel_pmu_drain_pebs_buffer() when the full PMU is\nnot disabled."}], "id": "CVE-2026-97960", "lastModified": "2026-10-21T13:21:17.560", "metrics": {}, "published": "2026-09-25T11:17:23.720", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9882068ed242fcd4743f53027e8c790e88dcafff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/999e482fdf89400cc1ae937680fc05096b4c915b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a56c03a397e2cd0c4cf8da96dcd6214f7d0e7d8c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5fe19dd8b3ed5fad6e5e0f0c58c7245043ee4af"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c55599c0ec2aa020e41a0599c3044c56d8a2e7d9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: perf/x86/intel: Prevent drain_pebs() reentry", "id": "2541044", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541044"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-663", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nperf/x86/intel: Prevent drain_pebs() reentry\nThe PEBS buffer is shared by all events on a CPU, so drain_pebs() must\nnot be reentered. If so, one instance may observe stale buffer state and\npotentially access out-of-bound memory.\nMost invocations happen in NMI context, which naturally prevents reentry.\nHowever, drain_pebs() is also reachable from process context via\nintel_pmu_drain_pebs_buffer().\nIn those paths, the PMU is often already disabled, but not guaranteed.\nFor example, __intel_pmu_pebs_disable() only disables the target counter,\nso other active counters can still raise a PMI and interrupt an in-flight\ndrain_pebs(). Here is an example,\n__perf_addr_filters_adjust()\nperf_event_stop()\n__perf_event_stop()\nx86_pmu_stop() (event->pmu->stop)\nintel_pmu_disable_event()\nintel_pmu_pebs_disable()\n__intel_pmu_pebs_disable()\nintel_pmu_drain_large_pebs()\nintel_pmu_drain_pebs_buffer()\nIntroduce __intel_pmu_quiesce() and __intel_pmu_resume() helpers and\nuse them in intel_pmu_drain_large_pebs() to disable the full PMU\naround the intel_pmu_drain_pebs_buffer() call, preventing reentry.\nAlso add a warning in intel_pmu_drain_pebs_buffer() when the full PMU is\nnot disabled.", "A flaw was found in the Linux kernel. A concurrency issue in the Intel Performance Monitoring Unit (PMU) subsystem allows the Precise Event-Based Sampling (PEBS) buffer draining routine to be re-entered unexpectedly. A local user could exploit this flaw while configuring performance events to trigger out-of-bounds memory access, potentially resulting in a denial of service (system crash)."], "name": "CVE-2026-97960", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-97960\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97960\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97960.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b752ea0c28e3f7f0aaaad6abf84f735eebc37a60,a5fe19dd8b3ed5fad6e5e0f0c58c7245043ee4af)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b752ea0c28e3f7f0aaaad6abf84f735eebc37a60,c55599c0ec2aa020e41a0599c3044c56d8a2e7d9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b752ea0c28e3f7f0aaaad6abf84f735eebc37a60,a56c03a397e2cd0c4cf8da96dcd6214f7d0e7d8c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "a9165207b2b07415eeb01b3ac8bb84976ec96984"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.3.7,6.4)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "6.4"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.4)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.7,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc3,*)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-25T18:00:20.828890+00:00", "updated": "2026-10-01T04:45:12.419649+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-788", "CWE-362", "CWE-663"]}