{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72012", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.899Z", "datePublished": "2026-08-15T05:51:41.222Z", "dateUpdated": "2026-08-17T05:39:24.933Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:39:24.933Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing/osnoise: Call synchronize_rcu() when unregistering\n\nThis ensures that any RCU readers traversing the instance list\nhave finished, before releasing the reference on the tracer that\nthe instance points to."}], "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 - Exploitation requires writing tracefs (e.g. enabling osnoise/timerlat via current_tracer and deleting a tracing instance); there is no network, adjacent, or physical entry path to osnoise_unregister_instance().\nAC:L - An attacker who can configure tracing controls both teardown and sampling; deleting a trace instance while osnoise/timerlat is active races RCU readers that still dereference inst->tr, and this race is reliably attacker-driven.\nPR:L - Triggering requires tracefs write access to configure/destroy tracing instances; this is not init-namespace root on every system (tracing group/remounted tracefs or CAP_SYS_ADMIN in a container with tracefs mounted suffices).\nUI:N - No victim interaction is required; exploitation is achieved entirely by the attacker's tracing configuration and concurrent instance teardown.\nS:U - The use-after-free corrupts kernel memory within the same kernel security domain; it does not cross VM, IOMMU, or sandbox boundaries by itself.\nC:H - Deferred kvfree_rcu_mightsleep() lets __remove_instance() free the trace_array while RCU readers in IRQ/NMI/timerlat paths still dereference inst->tr, a classic UAF enabling arbitrary kernel memory disclosure.\nI:H - The dangling trace_array pointer can be leveraged for heap corruption and control-flow hijack; UAF of kernel heap objects is scored as high integrity impact even when the immediate failure mode is a crash.\nA:H - Concurrent access to a freed trace_array causes kernel oops/panic from RCU list walkers and buffer operations; UAF in interrupt context can crash or hang the system 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_osnoise.c"], "versions": [{"version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "lessThan": "3c693635bb7b3a9b6645831a84fed2af46cdf249", "status": "affected", "versionType": "git"}, {"version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "lessThan": "38366140dc8ee3568c7f0191d517e117963bd580", "status": "affected", "versionType": "git"}, {"version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "lessThan": "fad36954b29592ce463254179c3043697678481f", "status": "affected", "versionType": "git"}, {"version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "lessThan": "dd0160a0842337f12e7694d68b184050afc6d3a4", "status": "affected", "versionType": "git"}, {"version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "lessThan": "fe58f457ad8d0a2bef4e053cfecca4b5cd266b1a", "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_osnoise.c"], "versions": [{"version": "5.17", "status": "affected"}, {"version": "0", "lessThan": "5.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "5.17", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.17", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3c693635bb7b3a9b6645831a84fed2af46cdf249"}, {"url": "https://git.kernel.org/stable/c/38366140dc8ee3568c7f0191d517e117963bd580"}, {"url": "https://git.kernel.org/stable/c/fad36954b29592ce463254179c3043697678481f"}, {"url": "https://git.kernel.org/stable/c/dd0160a0842337f12e7694d68b184050afc6d3a4"}, {"url": "https://git.kernel.org/stable/c/fe58f457ad8d0a2bef4e053cfecca4b5cd266b1a"}], "title": "tracing/osnoise: Call synchronize_rcu() when unregistering", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/trace/trace_osnoise.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3c693635bb7b3a9b6645831a84fed2af46cdf249", "status": "affected", "version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "versionType": "git"}, {"lessThan": "38366140dc8ee3568c7f0191d517e117963bd580", "status": "affected", "version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "versionType": "git"}, {"lessThan": "fad36954b29592ce463254179c3043697678481f", "status": "affected", "version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "versionType": "git"}, {"lessThan": "dd0160a0842337f12e7694d68b184050afc6d3a4", "status": "affected", "version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "versionType": "git"}, {"lessThan": "fe58f457ad8d0a2bef4e053cfecca4b5cd266b1a", "status": "affected", "version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/trace/trace_osnoise.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.17"}, {"lessThan": "5.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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/osnoise: Call synchronize_rcu() when unregistering\n\nThis ensures that any RCU readers traversing the instance list\nhave finished, before releasing the reference on the tracer that\nthe instance points to."}], "id": "CVE-2026-72012", "lastModified": "2026-08-17T06:17:58.643", "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": "2026-08-15T06:20:59.907", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38366140dc8ee3568c7f0191d517e117963bd580"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3c693635bb7b3a9b6645831a84fed2af46cdf249"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dd0160a0842337f12e7694d68b184050afc6d3a4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fad36954b29592ce463254179c3043697678481f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fe58f457ad8d0a2bef4e053cfecca4b5cd266b1a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: tracing/osnoise: Call synchronize_rcu() when unregistering", "id": "2516441", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516441"}, "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-825", "details": ["A flaw was found in the Linux kernel's tracing/osnoise component. When unregistering a tracer instance, the system failed to call `synchronize_rcu()`, a mechanism for synchronizing read-copy-update (RCU) operations. This oversight could allow RCU readers to access memory that has already been freed, potentially leading to a use-after-free vulnerability. A local attacker could exploit this to cause a denial of service or potentially achieve arbitrary code execution."], "name": "CVE-2026-72012", "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": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72012\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72012\nhttps://lore.kernel.org/linux-cve-announce/2026081508-CVE-2026-72012-db27@gregkh/T"], "threat_severity": "Moderate"}