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CVE-2023-52445 (GCVE-0-2023-52445)

Vulnerability from cvelistv5 – Published: 2024-02-22 16:21 – Updated: 2026-05-11 19:27
VLAI
Title
media: pvrusb2: fix use after free on context disconnection
Summary
In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix use after free on context disconnection Upon module load, a kthread is created targeting the pvr2_context_thread_func function, which may call pvr2_context_destroy and thus call kfree() on the context object. However, that might happen before the usb hub_event handler is able to notify the driver. This patch adds a sanity check before the invalid read reported by syzbot, within the context disconnection call stack.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:02 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e5be15c63804e05b5a94197524023702a259e308 , < ec36c134dd020d28e312c2f1766f85525e747aab (git)
Affected: e5be15c63804e05b5a94197524023702a259e308 , < 47aa8fcd5e8b5563af4042a00f25ba89bef8f33d (git)
Affected: e5be15c63804e05b5a94197524023702a259e308 , < 3233d8bf7893550045682192cb227af7fa3defeb (git)
Affected: e5be15c63804e05b5a94197524023702a259e308 , < ec3634ebe23fc3c44ebc67c6d25917300bc68c08 (git)
Affected: e5be15c63804e05b5a94197524023702a259e308 , < 30773ea47d41773f9611ffb4ebc9bda9d19a9e7e (git)
Affected: e5be15c63804e05b5a94197524023702a259e308 , < 2cf0005d315549b8d2b940ff96a66c2a889aa795 (git)
Affected: e5be15c63804e05b5a94197524023702a259e308 , < 437b5f57732bb4cc32cc9f8895d2010ee9ff521c (git)
Affected: e5be15c63804e05b5a94197524023702a259e308 , < ded85b0c0edd8f45fec88783d7555a5b982449c1 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.26
Unaffected: 0 , < 2.6.26 (semver)
Unaffected: 4.19.306 , ≤ 4.19.* (semver)
Unaffected: 5.4.268 , ≤ 5.4.* (semver)
Unaffected: 5.10.209 , ≤ 5.10.* (semver)
Unaffected: 5.15.148 , ≤ 5.15.* (semver)
Unaffected: 6.1.75 , ≤ 6.1.* (semver)
Unaffected: 6.6.14 , ≤ 6.6.* (semver)
Unaffected: 6.7.2 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                  "version": "e5be15c63804e05b5a94197524023702a259e308",
                  "versionType": "git"
                },
                {
                  "lessThan": "437b5f57732bb4cc32cc9f8895d2010ee9ff521c",
                  "status": "affected",
                  "version": "e5be15c63804e05b5a94197524023702a259e308",
                  "versionType": "git"
                },
                {
                  "lessThan": "ded85b0c0edd8f45fec88783d7555a5b982449c1",
                  "status": "affected",
                  "version": "e5be15c63804e05b5a94197524023702a259e308",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/media/usb/pvrusb2/pvrusb2-context.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "2.6.26"
                },
                {
                  "lessThan": "2.6.26",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.19.*",
                  "status": "unaffected",
                  "version": "4.19.306",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.268",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.209",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.148",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.75",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.14",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.7.*",
                  "status": "unaffected",
                  "version": "6.7.2",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.8",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.19.306",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.268",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.209",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.148",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.75",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.14",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.7.2",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.8",
                      "versionStartIncluding": "2.6.26",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: pvrusb2: fix use after free on context disconnection\n\nUpon module load, a kthread is created targeting the\npvr2_context_thread_func function, which may call pvr2_context_destroy\nand thus call kfree() on the context object. However, that might happen\nbefore the usb hub_event handler is able to notify the driver. This\npatch adds a sanity check before the invalid read reported by syzbot,\nwithin the context disconnection call stack."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T07:36:41.651Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/ec36c134dd020d28e312c2f1766f85525e747aab"
            },
            {
              "url": "https://git.kernel.org/stable/c/47aa8fcd5e8b5563af4042a00f25ba89bef8f33d"
            },
            {
              "url": "https://git.kernel.org/stable/c/3233d8bf7893550045682192cb227af7fa3defeb"
            },
            {
              "url": "https://git.kernel.org/stable/c/ec3634ebe23fc3c44ebc67c6d25917300bc68c08"
            },
            {
              "url": "https://git.kernel.org/stable/c/30773ea47d41773f9611ffb4ebc9bda9d19a9e7e"
            },
            {
              "url": "https://git.kernel.org/stable/c/2cf0005d315549b8d2b940ff96a66c2a889aa795"
            },
            {
              "url": "https://git.kernel.org/stable/c/437b5f57732bb4cc32cc9f8895d2010ee9ff521c"
            },
            {
              "url": "https://git.kernel.org/stable/c/ded85b0c0edd8f45fec88783d7555a5b982449c1"
            }
          ],
          "title": "media: pvrusb2: fix use after free on context disconnection",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-52445",
        "datePublished": "2024-02-22T16:21:37.784Z",
        "dateReserved": "2024-02-20T12:30:33.291Z",
        "dateUpdated": "2025-05-04T07:36:41.651Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.