CVE-2026-90014

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90014", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.781Z", "datePublished": "2026-09-16T10:33:20.791Z", "dateUpdated": "2026-10-19T08:56:28.002Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:56:28.002Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Have show_event_filters/triggers files take trace array ref\n\nThe newly added files show_event_filters and show_event_triggers that show\nall filters or triggers that are set within the trace array do not take a\nreference for the trace array it is showing. Without taking a reference,\nthe trace_array may be freed via \"rmdir\" while a task is reading one of\ntheses files. Those files iterate all the events within an instance\n(trace_array) and nothing prevents that instance from being freed while\nits data is being read. This causes a use-after-free crash.\n\nHave the open of both those files take the trace_array reference via the\ntrace_array_get() that prevents the trace_array from being freed while the\nfiles are opened."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The UAF is reached only via local tracefs: open/read of instances/<name>/show_event_filters or show_event_triggers (ftrace_event_show_*_open -> seq_read -> t_start) concurrent with rmdir(2) of that instance (tracefs_syscall_rmdir -> instance_rmdir -> __remove_instance). There is no network, adjacent-radio, or physical path.\nAC:L - The attacker owns both sides and can trigger it sequentially: mkdir an instance, open show_event_filters/triggers (no trace_array ref), rmdir it (__remove_instance sees tr->ref==1 and kfree()s tr), then read the still-open fd. No victim state or uninfluenced layout is required; CONFIG_TRACING is standard.\nPR:L - The open path checks only LOCKDOWN_TRACEFS and DAC (files are 0440; instance mkdir/rmdir has no capable() gate). Tracefs uid=/gid=/mode= mounts on Android/Perfetto, ChromeOS, and distro tracing groups grant this to unprivileged users, matching CVE-2024-50207, CVE-2025-38101, and CVE-2026-74634.\nUI:N - The attacker creates the instance, opens the seq file, rmdirs it, and reads the fd from their own threads. No separate victim mount, click, or cooperating process is required.\nS:U - The use-after-free corrupts the host kernel's trace_array and event-file heap objects within the same OS security authority. It enables local privilege escalation but does not cross a VM, IOMMU, sandbox, or hardware trust boundary.\nC:H - After rmdir kfree()s the trace_array and its trace_event_file objects, t_start/t_next walk the freed tr->events list and t_show_filters copies filter->filter_string to userspace via seq_printf, disclosing recycled kernel heap. Use-after-free is scored C:H.\nI:H - t_show_triggers invokes data->cmd_ops->print() on use-after-free trigger objects, and walking the freed tr->events list is a heap UAF write/control-flow primitive after spraying. Use-after-free is scored I:H.\nA:H - syzkaller reported a KASAN slab-use-after-free in t_start/t_next when the instance is removed while the file is read, which oopses or panics the kernel. Any use-after-free of the trace_array is a reliable whole-system crash even without full exploitation."}]}], "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.c"], "versions": [{"version": "729757b96a662d87e334fe8b837707800d8fd551", "lessThan": "2ee3f7d43f79efaca0cd84a6798653d9d75ce60b", "status": "affected", "versionType": "git"}, {"version": "729757b96a662d87e334fe8b837707800d8fd551", "lessThan": "f4a771cc684c7354b6200147f7252c58d17408ff", "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.c"], "versions": [{"version": "7.0", "status": "affected"}, {"version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "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": "7.0", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2ee3f7d43f79efaca0cd84a6798653d9d75ce60b"}, {"url": "https://git.kernel.org/stable/c/f4a771cc684c7354b6200147f7252c58d17408ff"}], "title": "tracing: Have show_event_filters/triggers files take trace array ref", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/trace/trace_events.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2ee3f7d43f79efaca0cd84a6798653d9d75ce60b", "status": "affected", "version": "729757b96a662d87e334fe8b837707800d8fd551", "versionType": "git"}, {"lessThan": "f4a771cc684c7354b6200147f7252c58d17408ff", "status": "affected", "version": "729757b96a662d87e334fe8b837707800d8fd551", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/trace/trace_events.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.0"}, {"lessThan": "7.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "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: Have show_event_filters/triggers files take trace array ref\n\nThe newly added files show_event_filters and show_event_triggers that show\nall filters or triggers that are set within the trace array do not take a\nreference for the trace array it is showing. Without taking a reference,\nthe trace_array may be freed via \"rmdir\" while a task is reading one of\ntheses files. Those files iterate all the events within an instance\n(trace_array) and nothing prevents that instance from being freed while\nits data is being read. This causes a use-after-free crash.\n\nHave the open of both those files take the trace_array reference via the\ntrace_array_get() that prevents the trace_array from being freed while the\nfiles are opened."}], "id": "CVE-2026-90014", "lastModified": "2026-10-19T09:18:49.283", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-16T11:17:14.110", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2ee3f7d43f79efaca0cd84a6798653d9d75ce60b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f4a771cc684c7354b6200147f7252c58d17408ff"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[729757b96a662d87e334fe8b837707800d8fd551,2ee3f7d43f79efaca0cd84a6798653d9d75ce60b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[729757b96a662d87e334fe8b837707800d8fd551,f4a771cc684c7354b6200147f7252c58d17408ff)"}}], "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": "7.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc2,*]"}}], "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": "2026-09-17T00:00:16.363737+00:00", "updated": "2026-09-18T04:45:02.521773+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}