{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53305", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-16T08:09:37.994Z", "datePublished": "2025-09-16T16:11:44.845Z", "dateUpdated": "2026-08-05T09:13:25.762Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:13:25.762Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: Fix use-after-free\n\nFix potential use-after-free in l2cap_le_command_rej." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The vulnerable path is reached when a Bluetooth LE peer sends an L2CAP Command Reject on the LE signaling CID (hci_rx_work → l2cap_recv_acldata → l2cap_le_sig_channel → l2cap_le_command_rej), which requires adjacency on the Bluetooth radio segment.\nAC:L - An attacker who is the LE peer can send COMMAND_REJ with the ident from a pending LE CoC request and reliably hit the missing hold/put window; no conditions beyond the attacker's control are required.\nPR:N - LE ACL/L2CAP signaling is processed for an established HCI LE connection with no pairing, encryption, or local capability check before l2cap_le_command_rej runs.\nUI:N - Exploitation only needs an LE link and a matching pending channel ident; no additional victim action is required at exploit time once the stack is in that normal operational state.\nS:U - Impact is confined to the local kernel Bluetooth/L2CAP authority (memory corruption / privilege escalation on the host), with no cross-boundary escape.\nC:H - This is a use-after-free of struct l2cap_chan; UAF enables heap reuse and arbitrary kernel read primitives.\nI:H - The same UAF enables heap spraying and arbitrary write / control-flow hijacking in kernel context.\nA:H - Dereferencing the freed channel (e.g., in l2cap_chan_unlock after l2cap_chan_del) can oops/panic the kernel even without full exploitation." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/l2cap_core.c" ], "versions": [ { "version": "71fb419724fadab4efdf98210aa3fe053bd81d29", "lessThan": "e76bab1b7afa580cd76362540fc37551ada4359b", "status": "affected", "versionType": "git" }, { "version": "71fb419724fadab4efdf98210aa3fe053bd81d29", "lessThan": "1a40c56e8bff3e424724d78a9a6b3272dd8a371d", "status": "affected", "versionType": "git" }, { "version": "71fb419724fadab4efdf98210aa3fe053bd81d29", "lessThan": "fe49aa73cca6608714477b74bfc6874b9db979df", "status": "affected", "versionType": "git" }, { "version": "71fb419724fadab4efdf98210aa3fe053bd81d29", "lessThan": "2958cf9f805b9f0bdc4a761bf6ea281eb8d44f8e", "status": "affected", "versionType": "git" }, { "version": "71fb419724fadab4efdf98210aa3fe053bd81d29", "lessThan": "548a6b64b3c0688f01119a6fcccceb41f8c984e4", "status": "affected", "versionType": "git" }, { "version": "71fb419724fadab4efdf98210aa3fe053bd81d29", "lessThan": "149daab45922ab1ac7f0cbeacab7251a46bf5e63", "status": "affected", "versionType": "git" }, { "version": "71fb419724fadab4efdf98210aa3fe053bd81d29", "lessThan": "255be68150291440657b2cdb09420b69441af3d8", "status": "affected", "versionType": "git" }, { "version": "71fb419724fadab4efdf98210aa3fe053bd81d29", "lessThan": "f752a0b334bb95fe9b42ecb511e0864e2768046f", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/bluetooth/l2cap_core.c" ], "versions": [ { "version": "3.14", "status": "affected" }, { "version": "0", "lessThan": "3.14", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.324", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.293", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.255", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.192", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.128", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.47", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4.12", "lessThanOrEqual": "6.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "4.14.324" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "4.19.293" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "5.4.255" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "5.10.192" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "5.15.128" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.1.47" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.4.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.14", "versionEndExcluding": "6.5" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e76bab1b7afa580cd76362540fc37551ada4359b" }, { "url": "https://git.kernel.org/stable/c/1a40c56e8bff3e424724d78a9a6b3272dd8a371d" }, { "url": "https://git.kernel.org/stable/c/fe49aa73cca6608714477b74bfc6874b9db979df" }, { "url": "https://git.kernel.org/stable/c/2958cf9f805b9f0bdc4a761bf6ea281eb8d44f8e" }, { "url": "https://git.kernel.org/stable/c/548a6b64b3c0688f01119a6fcccceb41f8c984e4" }, { "url": "https://git.kernel.org/stable/c/149daab45922ab1ac7f0cbeacab7251a46bf5e63" }, { "url": "https://git.kernel.org/stable/c/255be68150291440657b2cdb09420b69441af3d8" }, { "url": "https://git.kernel.org/stable/c/f752a0b334bb95fe9b42ecb511e0864e2768046f" } ], "title": "Bluetooth: L2CAP: Fix use-after-free", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "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-2023-53305", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-01-14T18:23:06.561439Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:32:56.186Z" } } ] } }