Answer in brief
CVE-2026-98246 records a Unknown severity vulnerability in Bluetooth: hci_sync: Serialize local codec list cleanup. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=626535077ba9dc110787540d1fe24881094c15a1 <9f407d52c0d881430d689836d3e7d32aa36f98b5 || >=b938790e70540bf4f2e653dcd74b232494d06c8f <560ed4373c06a58123ecdf9ad5ecaddc87a73382 || >=b938790e70540bf4f2e653dcd74b232494d06c8f <1ee0c5429dc4a92879bda2554b1bfd4abc6c587c || >=b938790e70540bf4f2e653dcd74b232494d06c8f <4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00 || >=b938790e70540bf4f2e653dcd74b232494d06c8f <1276c2fafd18499769a28f96f45c5a76d6fc990e || >=b938790e70540bf4f2e653dcd74b232494d06c8f <9a10987a2f160a44a638c9a35994ca6e3089696e || eea5a8f0c3b7c884d2351e75fbdd0a3d7def5ae1 || >=6.1.57 <6.1.189 || >=6.5.7 <6.6 | 9f407d52c0d881430d689836d3e7d32aa36f98b5, 560ed4373c06a58123ecdf9ad5ecaddc87a73382, 1ee0c5429dc4a92879bda2554b1bfd4abc6c587c, 4dc1ae5ff75b17e17ec4b74b11cc4b0099e71e00, 1276c2fafd18499769a28f96f45c5a76d6fc990e, 9a10987a2f160a44a638c9a35994ca6e3089696e, 6.1.189, 6.6 |
| Linux/Linuxgeneric | 6.6 | Not reported |
Published upstream
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 6, 2026
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.
Quoted source text, attributed separately from HOL analysis.