CVE-2023-53374 (GCVE-0-2023-53374)

Vulnerability from cvelistv5 – Published: 2025-09-18 13:33 – Updated: 2026-08-05 09:13
VLAI
Title
Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early Not calling hci_(dis)connect_cfm before deleting conn referred to by a socket generally results to use-after-free. When cleaning up SCO connections when the parent ACL is deleted too early, use hci_conn_failed to do the connection cleanup properly. We also need to clean up ISO connections in a similar situation when connecting has started but LE Create CIS is not yet sent, so do it too here.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 2026-01-14 18:54 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f , < 397d58007532644b35fad746da48c41161f32a57 (git)
Affected: ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f , < e94b898463a62b72a2a8b75dea8936bf4db78e00 (git)
Affected: ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f , < 3344d318337d9dca928fd448e966557ec5063f85 (git)
Affected: 75e35bd4b7935ceed2aacd82f55940e73bf0b63b (git)
Affected: 6.3.8 , < 6.4 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.4
Unaffected: 0 , < 6.4 (semver)
Unaffected: 6.4.16 , ≤ 6.4.* (semver)
Unaffected: 6.5.3 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.8, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-53374\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-01-14T18:54:25.271043Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-416\", \"description\": \"CWE-416 Use After Free\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-01-14T18:54:21.383Z\"}}], \"cna\": {\"title\": \"Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f\", \"lessThan\": \"397d58007532644b35fad746da48c41161f32a57\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f\", \"lessThan\": \"e94b898463a62b72a2a8b75dea8936bf4db78e00\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f\", \"lessThan\": \"3344d318337d9dca928fd448e966557ec5063f85\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"75e35bd4b7935ceed2aacd82f55940e73bf0b63b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"6.3.8\", \"lessThan\": \"6.4\", \"versionType\": \"semver\"}], \"programFiles\": [\"net/bluetooth/hci_conn.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.4\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.4\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.4.16\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.4.*\"}, {\"status\": \"unaffected\", \"version\": \"6.5.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/bluetooth/hci_conn.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/397d58007532644b35fad746da48c41161f32a57\"}, {\"url\": \"https://git.kernel.org/stable/c/e94b898463a62b72a2a8b75dea8936bf4db78e00\"}, {\"url\": \"https://git.kernel.org/stable/c/3344d318337d9dca928fd448e966557ec5063f85\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nBluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early\\n\\nNot calling hci_(dis)connect_cfm before deleting conn referred to by a\\nsocket generally results to use-after-free.\\n\\nWhen cleaning up SCO connections when the parent ACL is deleted too\\nearly, use hci_conn_failed to do the connection cleanup properly.\\n\\nWe also need to clean up ISO connections in a similar situation when\\nconnecting has started but LE Create CIS is not yet sent, so do it too\\nhere.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.4.16\", \"versionStartIncluding\": \"6.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.3\", \"versionStartIncluding\": \"6.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6\", \"versionStartIncluding\": \"6.4\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"6.3.8\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-23T15:28:37.982Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-53374\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-23T15:28:37.982Z\", \"dateReserved\": \"2025-09-17T14:54:09.734Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-09-18T13:33:20.965Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.