CVE-2026-98246
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: Serialize local codec list cleanup hci_dev_close_sync() clears hdev->local_codecs after releasing hdev->lock. Codec list additions and both traversals in sco_sock_getsockopt() use that lock, but the close path does not. A close and BT_CODEC query can therefore interleave as follows: hci_dev_close_sync() sco_sock_getsockopt() hci_dev_lock() fetch codec entry hci_codec_list_clear() kfree(entry) read entry->id The reader then accesses an entry which the close path has freed. KASAN BUG: KASAN: slab-use-after-free in sco_sock_getsockopt+0xfa0/0xfe0 Read of size 1 at addr ffff8881001c3450 Call Trace: sco_sock_getsockopt+0xfa0/0xfe0 do_sock_getsockopt+0x537/0x7b0 __sys_getsockopt+0xf2/0x170 Allocated by task 92: hci_codec_list_add.isra.0+0x2c/0x440 hci_read_codec_capabilities+0x224/0x590 hci_read_supported_codecs+0x2c2/0x640 Freed by task 92: kfree+0x131/0x3c0 hci_codec_list_clear+0xd8/0x160 hci_dev_close_sync+0x92a/0xfa0 Take hdev->lock around the clear operation at its existing point in the close path. This makes the clear wait for active readers and prevents a new traversal until the list is empty without changing teardown ordering.
View original CVE JSON
{
"id": "CVE-2026-98246",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-10-06T09:18:12.783",
"lastModified": "2026-10-19T10:18:25.497",
"vulnStatus": "Received",
"cveTags": [],
"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": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "626535077ba9dc110787540d1fe24881094c15a1",
"lessThan": "9f407d52c0d881430d689836d3e7d32aa36f98b5",
"versionType": "git",
"status": "affected"
},
{
"version": "b938790e70540bf4f2e653dcd74b232494d06c8f",
"lessThan": "560ed4373c06a58123ecdf9ad5ecaddc87a73382",
"versionType": "git",
"status": "affected"
},
{
"version": "b938790e70540bf4f2e653dcd74b232494d06c8f",
"lessThan": "1ee0c5429dc4a92879bda2554b1bfd4abc6c587c",
"versionType": "git",
"status": "affected"
},
{
"version": "b938790e70540bf4f2e653dcd74b232494d06c8f",
"lessThan": "4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00",
"versionType": "git",
"status": "affected"
},
{
"version": "b938790e70540bf4f2e653dcd74b232494d06c8f",
"lessThan": "1276c2fafd18499769a28f96f45c5a76d6fc990e",
"versionType": "git",
"status": "affected"
},
{
"version": "b938790e70540bf4f2e653dcd74b232494d06c8f",
"lessThan": "9a10987a2f160a44a638c9a35994ca6e3089696e",
"versionType": "git",
"status": "affected"
},
{
"version": "eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1",
"versionType": "git",
"status": "affected"
},
{
"version": "6.1.57",
"lessThan": "6.1.189",
"versionType": "semver",
"status": "affected"
},
{
"version": "6.5.7",
"lessThan": "6.6",
"versionType": "semver",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "6.6",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.6",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.189",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.158",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.112",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.54",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.8",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/1276c2fafd18499769a28f96f45c5a76d6fc990e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/1ee0c5429dc4a92879bda2554b1bfd4abc6c587c",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/560ed4373c06a58123ecdf9ad5ecaddc87a73382",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9a10987a2f160a44a638c9a35994ca6e3089696e",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9f407d52c0d881430d689836d3e7d32aa36f98b5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}