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CVE-2023-2235 (GCVE-0-2023-2235)

Vulnerability from cvelistv5 – Published: 2023-05-01 12:51 – Updated: 2026-08-07 18:47
VLAI
Title
Use-after-free in Linux kernel's Performance Events subsystem
Summary
A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation. The perf_group_detach function did not check the event's siblings' attach_state before calling add_event_to_groups(), but remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability. We recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-03-05 18:38 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Kernel Affected: 5.13 , < 6.3 (custom)
guessed Create a notification for this product.
Date Public
2023-03-15 20:49
Credits
Budimir Markovic
Show details on NVD website
To clipboard 

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              "repo": "https://git.kernel.org",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "6.3",
                  "status": "affected",
                  "version": "5.13",
                  "versionType": "custom"
                }
              ]
            }
          ],
          "credits": [
            {
              "lang": "en",
              "type": "finder",
              "user": "00000000-0000-4000-9000-000000000000",
              "value": "Budimir Markovic"
            }
          ],
          "datePublic": "2023-03-15T20:49:00.000Z",
          "descriptions": [
            {
              "lang": "en",
              "supportingMedia": [
                {
                  "base64": false,
                  "type": "text/html",
                  "value": "\u003cp\u003eA use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation.\u003c/p\u003e\u003cp\u003eThe perf_group_detach function did not check the event\u0027s siblings\u0027 attach_state before calling add_event_to_groups(), but\u0026nbsp;remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability.\u003c/p\u003e\u003cp\u003eWe recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2.\u003c/p\u003e"
                }
              ],
              "value": "A use-after-free vulnerability in the Linux Kernel Performance Events system can be exploited to achieve local privilege escalation.\n\n\n\nThe perf_group_detach function did not check the event\u0027s siblings\u0027 attach_state before calling add_event_to_groups(), but\u00a0remove_on_exec made it possible to call list_del_event() on before detaching from their group, making it possible to use a dangling pointer causing a use-after-free vulnerability.\n\n\n\nWe recommend upgrading past commit fd0815f632c24878e325821943edccc7fde947a2."
            }
          ],
          "impacts": [
            {
              "capecId": "CAPEC-233",
              "descriptions": [
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                  "lang": "en",
                  "value": "CAPEC-233 Privilege Escalation"
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              ]
            }
          ],
          "metrics": [
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              "cvssV3_1": {
                "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"
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              "scenarios": [
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                  "value": "GENERAL"
                }
              ]
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          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-416",
                  "description": "CWE-416 Use After Free",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-07T18:47:17.681Z",
            "orgId": "14ed7db2-1595-443d-9d34-6215bf890778",
            "shortName": "Google"
          },
          "references": [
            {
              "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fd0815f632c24878e325821943edccc7fde947a2"
            },
            {
              "url": "https://kernel.dance/fd0815f632c24878e325821943edccc7fde947a2"
            }
          ],
          "source": {
            "discovery": "EXTERNAL"
          },
          "title": "Use-after-free in Linux kernel\u0027s Performance Events subsystem",
          "x_generator": {
            "engine": "Vulnogram 0.1.0-dev"
          }
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      },
      "cveMetadata": {
        "assignerOrgId": "14ed7db2-1595-443d-9d34-6215bf890778",
        "assignerShortName": "Google",
        "cveId": "CVE-2023-2235",
        "datePublished": "2023-05-01T12:51:25.433Z",
        "dateReserved": "2023-04-21T17:43:15.944Z",
        "dateUpdated": "2026-08-07T18:47:17.681Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
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    }
  }
}



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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.