CVE-2026-45836 (GCVE-0-2026-45836)

Vulnerability from cvelistv5 – Published: 2026-05-26 16:14 – Updated: 2026-05-26 16:14
VLAI
Title
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb()
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8d836d71e2223b8961b21112bb4ce89ef8231682 , < cf1fd517f892ded88168df878f834b625133f86d (git)
Affected: 8d836d71e2223b8961b21112bb4ce89ef8231682 , < 58dc5e3d8768e121907608e6e196a908512fb083 (git)
Affected: 8d836d71e2223b8961b21112bb4ce89ef8231682 , < 32bd343803d4ba47cc516f9d5f037f01b855d767 (git)
Affected: 8d836d71e2223b8961b21112bb4ce89ef8231682 , < a93d66907dd4d29b65c9797a93784bf61906d6d6 (git)
Affected: 8d836d71e2223b8961b21112bb4ce89ef8231682 , < 78a88d43dab8d23aeef934ed8ce34d40e6b3d613 (git)
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Linux Linux Affected: 3.13
Unaffected: 0 , < 3.13 (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.90 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1-rc3 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/l2cap_sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.13"
            },
            {
              "lessThan": "3.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.90",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.30",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "vulnerable": true
                },
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb()\n\nAdd the same NULL guard already present in\nl2cap_sock_resume_cb() and l2cap_sock_ready_cb()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-26T16:14:13.568Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cf1fd517f892ded88168df878f834b625133f86d"
        },
        {
          "url": "https://git.kernel.org/stable/c/58dc5e3d8768e121907608e6e196a908512fb083"
        },
        {
          "url": "https://git.kernel.org/stable/c/32bd343803d4ba47cc516f9d5f037f01b855d767"
        },
        {
          "url": "https://git.kernel.org/stable/c/a93d66907dd4d29b65c9797a93784bf61906d6d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/78a88d43dab8d23aeef934ed8ce34d40e6b3d613"
        }
      ],
      "title": "Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb()",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45836",
    "datePublished": "2026-05-26T16:14:13.568Z",
    "dateReserved": "2026-05-13T15:03:33.077Z",
    "dateUpdated": "2026-05-26T16:14:13.568Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-45836\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-26T17:16:50.813\",\"lastModified\":\"2026-05-26T20:06:20.310\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb()\\n\\nAdd the same NULL guard already present in\\nl2cap_sock_resume_cb() and l2cap_sock_ready_cb().\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/32bd343803d4ba47cc516f9d5f037f01b855d767\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/58dc5e3d8768e121907608e6e196a908512fb083\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/78a88d43dab8d23aeef934ed8ce34d40e6b3d613\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a93d66907dd4d29b65c9797a93784bf61906d6d6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf1fd517f892ded88168df878f834b625133f86d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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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.