CVE-2026-97936

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-97936", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:18:58.204Z", "datePublished": "2026-09-25T10:22:50.446Z", "dateUpdated": "2026-10-19T09:11:02.941Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:11:02.941Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Fix memory corruption from the histogram stacktrace modifier\n\nparse_field() sets HIST_FIELD_FL_STACKTRACE from the \".stacktrace\"\nmodifier before it looks the field name up, and nothing afterwards\nchecks that the name resolved to a field which holds a stacktrace.\ncreate_hist_field() picks HIST_FIELD_FN_STACK on the strength of the\nfield pointer alone, which reads a __data_loc word from the record and\nfollows its low 16 bits as an offset into the same record.\nevent_hist_trigger() takes the first word there as an entry count and\ncopies that many longs into a 31 entry array:\n\n\tn_entries = *stack;\n\tmemcpy(entries, ++stack, n_entries * sizeof(unsigned long));\n\nNeither end of that copy is bounded, and the count is whatever the event\nholds at the offset, so any field will do:\n\n # cd /sys/kernel/tracing/events/sched/sched_process_fork\n # echo 'hist:keys=parent_pid.stacktrace' > trigger\n # (true)\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n RIP: 0010:rb_insert_color+0x18/0x130\n timerqueue_linked_add+0x7e/0xd0\n enqueue_hrtimer+0x39/0xb0\n __hrtimer_run_queues+0x10f/0x1f0\n </IRQ>\n RIP: 0010:memcpy+0xc/0x30\n event_hist_trigger+0x165/0x690\n\nThe timer interrupt landed on the rbtree the copy had already run over.\nNo debug options are needed for this; KASAN reports the same write as an\nout-of-bounds read of 13835058055416381440 bytes.\n\nDocumentation/trace/histogram.rst already states the rule, \"must be a\nlong[] type\", so enforce it once the name has been resolved. Names which\nresolve to no field at all, \"hitcount.stacktrace\" and the common_*\npseudo-fields, are refused for the same reason: they hold no stacktrace\nto read."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/trace_events_hist.c"], "versions": [{"version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "lessThan": "98da3379cdee343f671dac89b9afbd8b071f2591", "status": "affected", "versionType": "git"}, {"version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "lessThan": "e183b84968d4a6ea476d806ea97668405aa56880", "status": "affected", "versionType": "git"}, {"version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "lessThan": "57bfc2a17954d173d2a4182f3b582ffbb23aff64", "status": "affected", "versionType": "git"}, {"version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "lessThan": "55caaf25da2c2bb9b75307e4c868726cb954b1d6", "status": "affected", "versionType": "git"}, {"version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "lessThan": "a5e70ba87ca8ebc79b4e63de302d03b0625fe153", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/trace_events_hist.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "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": "6.3", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.2.7"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/98da3379cdee343f671dac89b9afbd8b071f2591"}, {"url": "https://git.kernel.org/stable/c/e183b84968d4a6ea476d806ea97668405aa56880"}, {"url": "https://git.kernel.org/stable/c/57bfc2a17954d173d2a4182f3b582ffbb23aff64"}, {"url": "https://git.kernel.org/stable/c/55caaf25da2c2bb9b75307e4c868726cb954b1d6"}, {"url": "https://git.kernel.org/stable/c/a5e70ba87ca8ebc79b4e63de302d03b0625fe153"}], "title": "tracing: Fix memory corruption from the histogram stacktrace modifier", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/trace/trace_events_hist.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "98da3379cdee343f671dac89b9afbd8b071f2591", "status": "affected", "version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "versionType": "git"}, {"lessThan": "e183b84968d4a6ea476d806ea97668405aa56880", "status": "affected", "version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "versionType": "git"}, {"lessThan": "57bfc2a17954d173d2a4182f3b582ffbb23aff64", "status": "affected", "version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "versionType": "git"}, {"lessThan": "55caaf25da2c2bb9b75307e4c868726cb954b1d6", "status": "affected", "version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "versionType": "git"}, {"lessThan": "a5e70ba87ca8ebc79b4e63de302d03b0625fe153", "status": "affected", "version": "cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/trace/trace_events_hist.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.3"}, {"lessThan": "6.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.111", "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\ntracing: Fix memory corruption from the histogram stacktrace modifier\n\nparse_field() sets HIST_FIELD_FL_STACKTRACE from the \".stacktrace\"\nmodifier before it looks the field name up, and nothing afterwards\nchecks that the name resolved to a field which holds a stacktrace.\ncreate_hist_field() picks HIST_FIELD_FN_STACK on the strength of the\nfield pointer alone, which reads a __data_loc word from the record and\nfollows its low 16 bits as an offset into the same record.\nevent_hist_trigger() takes the first word there as an entry count and\ncopies that many longs into a 31 entry array:\n\n\tn_entries = *stack;\n\tmemcpy(entries, ++stack, n_entries * sizeof(unsigned long));\n\nNeither end of that copy is bounded, and the count is whatever the event\nholds at the offset, so any field will do:\n\n # cd /sys/kernel/tracing/events/sched/sched_process_fork\n # echo 'hist:keys=parent_pid.stacktrace' > trigger\n # (true)\n\n BUG: kernel NULL pointer dereference, address: 0000000000000008\n RIP: 0010:rb_insert_color+0x18/0x130\n timerqueue_linked_add+0x7e/0xd0\n enqueue_hrtimer+0x39/0xb0\n __hrtimer_run_queues+0x10f/0x1f0\n </IRQ>\n RIP: 0010:memcpy+0xc/0x30\n event_hist_trigger+0x165/0x690\n\nThe timer interrupt landed on the rbtree the copy had already run over.\nNo debug options are needed for this; KASAN reports the same write as an\nout-of-bounds read of 13835058055416381440 bytes.\n\nDocumentation/trace/histogram.rst already states the rule, \"must be a\nlong[] type\", so enforce it once the name has been resolved. Names which\nresolve to no field at all, \"hitcount.stacktrace\" and the common_*\npseudo-fields, are refused for the same reason: they hold no stacktrace\nto read."}], "id": "CVE-2026-97936", "lastModified": "2026-10-19T10:17:44.623", "metrics": {}, "published": "2026-09-25T11:17:20.963", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/55caaf25da2c2bb9b75307e4c868726cb954b1d6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/57bfc2a17954d173d2a4182f3b582ffbb23aff64"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/98da3379cdee343f671dac89b9afbd8b071f2591"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5e70ba87ca8ebc79b4e63de302d03b0625fe153"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e183b84968d4a6ea476d806ea97668405aa56880"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: tracing: Fix memory corruption from the histogram stacktrace modifier", "id": "2541034", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2541034"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ntracing: Fix memory corruption from the histogram stacktrace modifier\nparse_field() sets HIST_FIELD_FL_STACKTRACE from the \".stacktrace\"\nmodifier before it looks the field name up, and nothing afterwards\nchecks that the name resolved to a field which holds a stacktrace.\ncreate_hist_field() picks HIST_FIELD_FN_STACK on the strength of the\nfield pointer alone, which reads a __data_loc word from the record and\nfollows its low 16 bits as an offset into the same record.\nevent_hist_trigger() takes the first word there as an entry count and\ncopies that many longs into a 31 entry array:\nn_entries = *stack;\nmemcpy(entries, ++stack, n_entries * sizeof(unsigned long));\nNeither end of that copy is bounded, and the count is whatever the event\nholds at the offset, so any field will do:\n# cd /sys/kernel/tracing/events/sched/sched_process_fork\n# echo 'hist:keys=parent_pid.stacktrace' > trigger\n# (true)\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nRIP: 0010:rb_insert_color+0x18/0x130\ntimerqueue_linked_add+0x7e/0xd0\nenqueue_hrtimer+0x39/0xb0\n__hrtimer_run_queues+0x10f/0x1f0\n</IRQ>\nRIP: 0010:memcpy+0xc/0x30\nevent_hist_trigger+0x165/0x690\nThe timer interrupt landed on the rbtree the copy had already run over.\nNo debug options are needed for this; KASAN reports the same write as an\nout-of-bounds read of 13835058055416381440 bytes.\nDocumentation/trace/histogram.rst already states the rule, \"must be a\nlong[] type\", so enforce it once the name has been resolved. Names which\nresolve to no field at all, \"hitcount.stacktrace\" and the common_*\npseudo-fields, are refused for the same reason: they hold no stacktrace\nto read.", "A flaw was found in the Linux kernel's tracing subsystem. A local user with permissions to configure event triggers could cause a Denial of Service (DoS) or memory corruption by applying a stacktrace modifier to an unsupported field. Because the kernel fails to validate the field type, it performs an unbounded memory copy into a fixed-size buffer. This flaw corrupts adjacent kernel memory, resulting in an immediate system crash."], "name": "CVE-2026-97936", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Not affected", "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": "Not affected", "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-2026-97936\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-97936\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97936.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314,e183b84968d4a6ea476d806ea97668405aa56880)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314,57bfc2a17954d173d2a4182f3b582ffbb23aff64)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314,55caaf25da2c2bb9b75307e4c868726cb954b1d6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cc5fc8bfc961eeb99b7e8dffbeff7a3f6995d314,a5e70ba87ca8ebc79b4e63de302d03b0625fe153)"}}], "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": "generic", "value": "6.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.111,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.53,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.7,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "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": "2026-09-25T18:30:17.212818+00:00", "updated": "2026-10-01T08:45:03.646111+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}