CVE-2026-72012 (GCVE-0-2026-72012)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-23 12:46
VLAI
Title
tracing/osnoise: Call synchronize_rcu() when unregistering
Summary
In the Linux kernel, the following vulnerability has been resolved: tracing/osnoise: Call synchronize_rcu() when unregistering This ensures that any RCU readers traversing the instance list have finished, before releasing the reference on the tracer that the instance points to.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a6ed2aee54644cfa2d04ca86308767f5c3a087e8 , < 428cedade9b2cc8e48f00742df0cfd770e77a803 (git)
Affected: a6ed2aee54644cfa2d04ca86308767f5c3a087e8 , < 3c693635bb7b3a9b6645831a84fed2af46cdf249 (git)
Affected: a6ed2aee54644cfa2d04ca86308767f5c3a087e8 , < 38366140dc8ee3568c7f0191d517e117963bd580 (git)
Affected: a6ed2aee54644cfa2d04ca86308767f5c3a087e8 , < fad36954b29592ce463254179c3043697678481f (git)
Affected: a6ed2aee54644cfa2d04ca86308767f5c3a087e8 , < dd0160a0842337f12e7694d68b184050afc6d3a4 (git)
Affected: a6ed2aee54644cfa2d04ca86308767f5c3a087e8 , < fe58f457ad8d0a2bef4e053cfecca4b5cd266b1a (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.184 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "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": "428cedade9b2cc8e48f00742df0cfd770e77a803",
              "status": "affected",
              "version": "a6ed2aee54644cfa2d04ca86308767f5c3a087e8",
              "versionType": "git"
            },
            {
              "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": "6.1.*",
              "status": "unaffected",
              "version": "6.1.184",
              "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"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.184",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "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-\u003etr, 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\u0027s 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-\u003etr, 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-23T12:46:24.402Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/428cedade9b2cc8e48f00742df0cfd770e77a803"
        },
        {
          "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"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72012",
    "datePublished": "2026-08-15T05:51:41.222Z",
    "dateReserved": "2026-08-09T03:40:39.899Z",
    "dateUpdated": "2026-08-23T12:46:24.402Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-72012",
      "date": "2026-08-24",
      "epss": "0.00164",
      "percentile": "0.05785"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-72012\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:20:59.907\",\"lastModified\":\"2026-08-23T13:16:37.100\",\"vulnStatus\":\"Received\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"kernel/trace/trace_osnoise.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"a6ed2aee54644cfa2d04ca86308767f5c3a087e8\",\"lessThan\":\"428cedade9b2cc8e48f00742df0cfd770e77a803\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a6ed2aee54644cfa2d04ca86308767f5c3a087e8\",\"lessThan\":\"3c693635bb7b3a9b6645831a84fed2af46cdf249\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a6ed2aee54644cfa2d04ca86308767f5c3a087e8\",\"lessThan\":\"38366140dc8ee3568c7f0191d517e117963bd580\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a6ed2aee54644cfa2d04ca86308767f5c3a087e8\",\"lessThan\":\"fad36954b29592ce463254179c3043697678481f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a6ed2aee54644cfa2d04ca86308767f5c3a087e8\",\"lessThan\":\"dd0160a0842337f12e7694d68b184050afc6d3a4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a6ed2aee54644cfa2d04ca86308767f5c3a087e8\",\"lessThan\":\"fe58f457ad8d0a2bef4e053cfecca4b5cd266b1a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"kernel/trace/trace_osnoise.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"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/428cedade9b2cc8e48f00742df0cfd770e77a803\",\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T16:05:47+00:00",
      "cve": "CVE-2026-72012",
      "id": "CVE-2026-72012",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: tracing/osnoise: Call synchronize_rcu() when unregistering",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72012.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.