{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53357", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.400Z", "datePublished": "2026-07-02T13:43:17.077Z", "dateUpdated": "2026-07-02T13:43:17.077Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-02T13:43:17.077Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()\n\nbt_accept_dequeue() unlinks a not-yet-accepted child from the parent\naccept queue and release_sock()s it before returning, so the returned\nsk has no caller reference and is unlocked.\n\nl2cap_sock_cleanup_listen() walks these children on listening-socket\nclose. A concurrent HCI disconnect drives hci_rx_work ->\nl2cap_conn_del() which runs l2cap_chan_del() + l2cap_sock_kill() and\nfrees the child sk and its l2cap_chan; cleanup_listen() then uses both:\n\n BUG: KASAN: slab-use-after-free in l2cap_sock_kill\n l2cap_sock_kill / l2cap_sock_cleanup_listen / __x64_sys_close\n Freed by: l2cap_conn_del -> l2cap_sock_close_cb -> l2cap_sock_kill\n\nThis is distinct from the two fixes already in this area: commit\ne83f5e24da741 (\"Bluetooth: serialize accept_q access\") serialises the\naccept_q list/poll and takes temporary refs inside bt_accept_dequeue(),\nand CVE-2025-39860 serialises the userspace close()/accept() race by\ncalling cleanup_listen() under lock_sock() in l2cap_sock_release().\nNeither covers l2cap_conn_del() running from hci_rx_work, so this UAF\nstill reproduces on current bluetooth/master.\n\nTake the reference at the source: bt_accept_dequeue() does sock_hold()\nwhile sk is still locked, before release_sock(); callers sock_put().\ncleanup_listen() pins the chan with l2cap_chan_hold_unless_zero() under\na brief child sk lock (serialising vs l2cap_sock_teardown_cb()), drops\nit before l2cap_chan_lock(), and skips a duplicate l2cap_sock_kill() on\nSOCK_DEAD. conn->lock is not taken here: cleanup_listen() runs under\nthe parent sk lock and that would invert\nconn->lock -> chan->lock -> sk_lock (lockdep).\n\nKASAN/SMP: an unprivileged listen/close vs HCI-disconnect race produced\n12 use-after-free reports per run before this change; 0, and no lockdep\nreport, over 1600+ raced iterations after it on bluetooth/master."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/af_bluetooth.c", "net/bluetooth/iso.c", "net/bluetooth/l2cap_sock.c", "net/bluetooth/rfcomm/sock.c", "net/bluetooth/sco.c"], "versions": [{"version": "15f02b91056253e8cdc592888f431da0731337b8", "lessThan": "751de6ec671fe75ad9cf65a0638d2a06b6a5984d", "status": "affected", "versionType": "git"}, {"version": "15f02b91056253e8cdc592888f431da0731337b8", "lessThan": "407217734835d21d4e0105ebf347860dc1806f88", "status": "affected", "versionType": "git"}, {"version": "15f02b91056253e8cdc592888f431da0731337b8", "lessThan": "7eebd4c2c86f573af87ff165d08a83432eb0b919", "status": "affected", "versionType": "git"}, {"version": "15f02b91056253e8cdc592888f431da0731337b8", "lessThan": "5d86d2f1b4d9a508c441d3e45277ae1a73cfed57", "status": "affected", "versionType": "git"}, {"version": "15f02b91056253e8cdc592888f431da0731337b8", "lessThan": "87c543e2f78d0871f271df92dab98901bbd5b6f5", "status": "affected", "versionType": "git"}, {"version": "15f02b91056253e8cdc592888f431da0731337b8", "lessThan": "added1213395071470a900cc845a042fb51882a6", "status": "affected", "versionType": "git"}, {"version": "15f02b91056253e8cdc592888f431da0731337b8", "lessThan": "a5ca86a6097a8b030ca3226cd300b17ed330f966", "status": "affected", "versionType": "git"}, {"version": "15f02b91056253e8cdc592888f431da0731337b8", "lessThan": "ab1513597c6cf17cd1ad2a21e3b045421b48e022", "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/af_bluetooth.c", "net/bluetooth/iso.c", "net/bluetooth/l2cap_sock.c", "net/bluetooth/rfcomm/sock.c", "net/bluetooth/sco.c"], "versions": [{"version": "5.7", "status": "affected"}, {"version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.7", "versionEndExcluding": "5.10.259"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/751de6ec671fe75ad9cf65a0638d2a06b6a5984d"}, {"url": "https://git.kernel.org/stable/c/407217734835d21d4e0105ebf347860dc1806f88"}, {"url": "https://git.kernel.org/stable/c/7eebd4c2c86f573af87ff165d08a83432eb0b919"}, {"url": "https://git.kernel.org/stable/c/5d86d2f1b4d9a508c441d3e45277ae1a73cfed57"}, {"url": "https://git.kernel.org/stable/c/87c543e2f78d0871f271df92dab98901bbd5b6f5"}, {"url": "https://git.kernel.org/stable/c/added1213395071470a900cc845a042fb51882a6"}, {"url": "https://git.kernel.org/stable/c/a5ca86a6097a8b030ca3226cd300b17ed330f966"}, {"url": "https://git.kernel.org/stable/c/ab1513597c6cf17cd1ad2a21e3b045421b48e022"}], "title": "Bluetooth: fix UAF in l2cap_sock_cleanup_listen() vs l2cap_conn_del()", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15f02b91056253e8cdc592888f431da0731337b8,751de6ec671fe75ad9cf65a0638d2a06b6a5984d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15f02b91056253e8cdc592888f431da0731337b8,407217734835d21d4e0105ebf347860dc1806f88)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15f02b91056253e8cdc592888f431da0731337b8,7eebd4c2c86f573af87ff165d08a83432eb0b919)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15f02b91056253e8cdc592888f431da0731337b8,5d86d2f1b4d9a508c441d3e45277ae1a73cfed57)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15f02b91056253e8cdc592888f431da0731337b8,87c543e2f78d0871f271df92dab98901bbd5b6f5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15f02b91056253e8cdc592888f431da0731337b8,added1213395071470a900cc845a042fb51882a6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15f02b91056253e8cdc592888f431da0731337b8,a5ca86a6097a8b030ca3226cd300b17ed330f966)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[15f02b91056253e8cdc592888f431da0731337b8,ab1513597c6cf17cd1ad2a21e3b045421b48e022)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.259,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.210,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.175,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.142,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.92,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-02T17:00:15.162612+00:00", "updated": "2026-07-02T17:00:15.162659+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}