Vulnerability-Lookup

FKIE_CVE-2026-72012

Vulnerability from fkie_nvd - Published: 2026-08-15 06:20 - Updated: 2026-08-23 13:16

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/38366140dc8ee3568c7f0191d517e117963bd580
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3c693635bb7b3a9b6645831a84fed2af46cdf249
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/428cedade9b2cc8e48f00742df0cfd770e77a803
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dd0160a0842337f12e7694d68b184050afc6d3a4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fad36954b29592ce463254179c3043697678481f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fe58f457ad8d0a2bef4e053cfecca4b5cd266b1a

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "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": "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"
            }
          ]
        }
      ],
      "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": "2026-08-23T13:16:37.100",
  "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/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"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

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

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-23 12:46

Title

tracing/osnoise: Call synchronize_rcu() when unregistering

Summary

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/428cedade9b2cc8e4…
https://git.kernel.org/stable/c/3c693635bb7b3a9b6…
https://git.kernel.org/stable/c/38366140dc8ee3568…
https://git.kernel.org/stable/c/fad36954b29592ce4…
https://git.kernel.org/stable/c/dd0160a0842337f12…
https://git.kernel.org/stable/c/fe58f457ad8d0a2be…

Impacted products

2 products

Vendor	Product	Version
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)
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)

Show details on NVD website

JSON

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"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

FKIE_CVE-2026-72012

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

Tags

Sightings

Nomenclature