Bluetooth: hci_sync: Serialize local codec list cleanup
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.
CVE-2026-98246
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98246
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"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"
}
],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98246
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38325 · Revision 1
- Added to Heist Feed
- Publisher date