CVE-2026-90254

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90254", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.796Z", "datePublished": "2026-09-17T16:07:54.123Z", "dateUpdated": "2026-10-19T09:00:30.990Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:00:30.990Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: free the advertising instance on the failure and cancel paths\n\nadv_timeout_expire() hands a kmalloc()ed instance byte to\nhci_cmd_sync_queue() with a NULL destroy callback, and only\nadv_timeout_expire_sync() frees it. That leaks on two paths:\n\n - the return value is not checked, and hci_cmd_sync_queue() does not\n take ownership when it fails (-ENETDOWN, -ENODEV, -ENOMEM);\n\n - a cancelled entry is not released, as _hci_cmd_sync_cancel_entry()\n does not free entry->data when there is no destroy callback.\n hci_cmd_sync_clear() cancels every pending entry when the controller\n is unregistered.\n\nFree the buffer from a destroy callback, and in the caller when the entry\ncould not be queued at all."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/bluetooth/hci_sync.c"], "versions": [{"version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "lessThan": "c2019224a766245b7db39d87fdfe84c3fdc879d9", "status": "affected", "versionType": "git"}, {"version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "lessThan": "193182c6467f508a8a61d5db506d796ffed6eee6", "status": "affected", "versionType": "git"}, {"version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "lessThan": "2e3d827cd56865c14f6ca118bbccd7801091fb21", "status": "affected", "versionType": "git"}, {"version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "lessThan": "9c3b6c1413bd0b4993642d987616331f84d9b7f5", "status": "affected", "versionType": "git"}, {"version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "lessThan": "bb5ca1cc7744c41c59002bd6523714a685ae6595", "status": "affected", "versionType": "git"}, {"version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "lessThan": "120d8dc042e3d45073bb6e50ee7b058a0b182627", "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/hci_sync.c"], "versions": [{"version": "6.1", "status": "affected"}, {"version": "0", "lessThan": "6.1", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.1", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c2019224a766245b7db39d87fdfe84c3fdc879d9"}, {"url": "https://git.kernel.org/stable/c/193182c6467f508a8a61d5db506d796ffed6eee6"}, {"url": "https://git.kernel.org/stable/c/2e3d827cd56865c14f6ca118bbccd7801091fb21"}, {"url": "https://git.kernel.org/stable/c/9c3b6c1413bd0b4993642d987616331f84d9b7f5"}, {"url": "https://git.kernel.org/stable/c/bb5ca1cc7744c41c59002bd6523714a685ae6595"}, {"url": "https://git.kernel.org/stable/c/120d8dc042e3d45073bb6e50ee7b058a0b182627"}], "title": "Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/bluetooth/hci_sync.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c2019224a766245b7db39d87fdfe84c3fdc879d9", "status": "affected", "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "versionType": "git"}, {"lessThan": "193182c6467f508a8a61d5db506d796ffed6eee6", "status": "affected", "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "versionType": "git"}, {"lessThan": "2e3d827cd56865c14f6ca118bbccd7801091fb21", "status": "affected", "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "versionType": "git"}, {"lessThan": "9c3b6c1413bd0b4993642d987616331f84d9b7f5", "status": "affected", "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "versionType": "git"}, {"lessThan": "bb5ca1cc7744c41c59002bd6523714a685ae6595", "status": "affected", "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "versionType": "git"}, {"lessThan": "120d8dc042e3d45073bb6e50ee7b058a0b182627", "status": "affected", "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/bluetooth/hci_sync.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.1"}, {"lessThan": "6.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: free the advertising instance on the failure and cancel paths\n\nadv_timeout_expire() hands a kmalloc()ed instance byte to\nhci_cmd_sync_queue() with a NULL destroy callback, and only\nadv_timeout_expire_sync() frees it. That leaks on two paths:\n\n - the return value is not checked, and hci_cmd_sync_queue() does not\n take ownership when it fails (-ENETDOWN, -ENODEV, -ENOMEM);\n\n - a cancelled entry is not released, as _hci_cmd_sync_cancel_entry()\n does not free entry->data when there is no destroy callback.\n hci_cmd_sync_clear() cancels every pending entry when the controller\n is unregistered.\n\nFree the buffer from a destroy callback, and in the caller when the entry\ncould not be queued at all."}], "id": "CVE-2026-90254", "lastModified": "2026-10-19T09:19:17.390", "metrics": {}, "published": "2026-09-17T17:17:21.730", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/120d8dc042e3d45073bb6e50ee7b058a0b182627"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/193182c6467f508a8a61d5db506d796ffed6eee6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2e3d827cd56865c14f6ca118bbccd7801091fb21"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9c3b6c1413bd0b4993642d987616331f84d9b7f5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bb5ca1cc7744c41c59002bd6523714a685ae6595"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c2019224a766245b7db39d87fdfe84c3fdc879d9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c249ea9b4309cf3250c5bbb42a05d38d0ed9071c,c2019224a766245b7db39d87fdfe84c3fdc879d9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c249ea9b4309cf3250c5bbb42a05d38d0ed9071c,193182c6467f508a8a61d5db506d796ffed6eee6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c249ea9b4309cf3250c5bbb42a05d38d0ed9071c,2e3d827cd56865c14f6ca118bbccd7801091fb21)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c249ea9b4309cf3250c5bbb42a05d38d0ed9071c,9c3b6c1413bd0b4993642d987616331f84d9b7f5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c249ea9b4309cf3250c5bbb42a05d38d0ed9071c,bb5ca1cc7744c41c59002bd6523714a685ae6595)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c249ea9b4309cf3250c5bbb42a05d38d0ed9071c,120d8dc042e3d45073bb6e50ee7b058a0b182627)"}}], "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": "6.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "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": "2026-09-19T03:45:17.045624+00:00", "updated": "2026-09-19T04:15:13.635297+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-401"]}