{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98246", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.330Z", "datePublished": "2026-10-06T08:45:15.411Z", "dateUpdated": "2026-10-19T09:16:17.812Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:16:17.812Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: Serialize local codec list cleanup\n\nhci_dev_close_sync() clears hdev->local_codecs after releasing hdev->lock.\nCodec list additions and both traversals in sco_sock_getsockopt() use that\nlock, but the close path does not. A close and BT_CODEC query can therefore\ninterleave as follows:\n\n hci_dev_close_sync() sco_sock_getsockopt()\n hci_dev_lock()\n fetch codec entry\n hci_codec_list_clear()\n kfree(entry)\n read entry->id\n\nThe reader then accesses an entry which the close path has freed. KASAN\n\n BUG: KASAN: slab-use-after-free in sco_sock_getsockopt+0xfa0/0xfe0\n Read of size 1 at addr ffff8881001c3450\n Call Trace:\n sco_sock_getsockopt+0xfa0/0xfe0\n do_sock_getsockopt+0x537/0x7b0\n __sys_getsockopt+0xf2/0x170\n Allocated by task 92:\n hci_codec_list_add.isra.0+0x2c/0x440\n hci_read_codec_capabilities+0x224/0x590\n hci_read_supported_codecs+0x2c2/0x640\n Freed by task 92:\n kfree+0x131/0x3c0\n hci_codec_list_clear+0xd8/0x160\n hci_dev_close_sync+0x92a/0xfa0\n\nTake hdev->lock around the clear operation at its existing point in the\nclose path. This makes the clear wait for active readers and prevents a new\ntraversal until the list is empty without changing teardown ordering." } ], "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": "626535077ba9dc110787540d1fe24881094c15a1", "lessThan": "9f407d52c0d881430d689836d3e7d32aa36f98b5", "status": "affected", "versionType": "git" }, { "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "560ed4373c06a58123ecdf9ad5ecaddc87a73382", "status": "affected", "versionType": "git" }, { "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "1ee0c5429dc4a92879bda2554b1bfd4abc6c587c", "status": "affected", "versionType": "git" }, { "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00", "status": "affected", "versionType": "git" }, { "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "1276c2fafd18499769a28f96f45c5a76d6fc990e", "status": "affected", "versionType": "git" }, { "version": "b938790e70540bf4f2e653dcd74b232494d06c8f", "lessThan": "9a10987a2f160a44a638c9a35994ca6e3089696e", "status": "affected", "versionType": "git" }, { "version": "eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1", "status": "affected", "versionType": "git" }, { "version": "6.1.57", "lessThan": "6.1.189", "status": "affected", "versionType": "semver" }, { "version": "6.5.7", "lessThan": "6.6", "status": "affected", "versionType": "semver" } ] }, { "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": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.8", "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": "6.1.57", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.12.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.18.54" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.2.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.5.7" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9f407d52c0d881430d689836d3e7d32aa36f98b5" }, { "url": "https://git.kernel.org/stable/c/560ed4373c06a58123ecdf9ad5ecaddc87a73382" }, { "url": "https://git.kernel.org/stable/c/1ee0c5429dc4a92879bda2554b1bfd4abc6c587c" }, { "url": "https://git.kernel.org/stable/c/4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00" }, { "url": "https://git.kernel.org/stable/c/1276c2fafd18499769a28f96f45c5a76d6fc990e" }, { "url": "https://git.kernel.org/stable/c/9a10987a2f160a44a638c9a35994ca6e3089696e" } ], "title": "Bluetooth: hci_sync: Serialize local codec list cleanup", "x_generator": { "engine": "bippy-1.2.0" } } } }