Answer in brief
CVE-2026-89569 records a High severity (CVSS 8.8) vulnerability in Bluetooth: RFCOMM: serialize security confirmation handling. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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.
CVSS is 8.8. 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=08c30aca9e698faddebd34f81e1196295f9dc063 <1b7841ffad08e911e8c4b9470f3fa08423568940 || >=08c30aca9e698faddebd34f81e1196295f9dc063 <946d76db77ee5f922968ce558629ae47b381e3fc || >=08c30aca9e698faddebd34f81e1196295f9dc063 <fbf7961964a6e93360179f64712320ae9a1e9577 || >=08c30aca9e698faddebd34f81e1196295f9dc063 <759c185d0bbdb131357408f50b8735e04ed3caff | 1b7841ffad08e911e8c4b9470f3fa08423568940, 946d76db77ee5f922968ce558629ae47b381e3fc, fbf7961964a6e93360179f64712320ae9a1e9577, 759c185d0bbdb131357408f50b8735e04ed3caff |
| Linux/Linuxgeneric | 3.10 | Not reported |
| Linux/Linuxgeneric | >=08c30aca9e698faddebd34f81e1196295f9dc063 <62ce8b33eb238cf18c15207332fbdc26d858f592 || >=08c30aca9e698faddebd34f81e1196295f9dc063 <3873f3449701b3dc98cba577923be6493598e7a1 || >=08c30aca9e698faddebd34f81e1196295f9dc063 <7ded3264106418c6456ccceaafd9fda596ce12c3 || >=08c30aca9e698faddebd34f81e1196295f9dc063 <82425b14f0fb22e46cfddc56d6465570f5ed0ce6 || >=08c30aca9e698faddebd34f81e1196295f9dc063 <1b7841ffad08e911e8c4b9470f3fa08423568940 || >=08c30aca9e698faddebd34f81e1196295f9dc063 <946d76db77ee5f922968ce558629ae47b381e3fc || >=08c30aca9e698faddebd34f81e1196295f9dc063 <fbf7961964a6e93360179f64712320ae9a1e9577 || >=08c30aca9e698faddebd34f81e1196295f9dc063 <759c185d0bbdb131357408f50b8735e04ed3caff | 62ce8b33eb238cf18c15207332fbdc26d858f592, 3873f3449701b3dc98cba577923be6493598e7a1, 7ded3264106418c6456ccceaafd9fda596ce12c3, 82425b14f0fb22e46cfddc56d6465570f5ed0ce6, 1b7841ffad08e911e8c4b9470f3fa08423568940, 946d76db77ee5f922968ce558629ae47b381e3fc, fbf7961964a6e93360179f64712320ae9a1e9577, 759c185d0bbdb131357408f50b8735e04ed3caff |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: serialize security confirmation handling rfcomm_security_cfm() looks up a session on session_list and then walks its DLC list without holding rfcomm_mutex. Since RFCOMM session teardown uses rfcomm_mutex, krfcommd can close and free the same session and DLCs concurrently: hci_rx_work krfcommd ----------- --------- rfcomm_session_get() rfcomm_lock() rfcomm_session_close() rfcomm_dlc_unlink() rfcomm_session_del() kfree(s) rfcomm_unlock() walk s->dlcs The callback can then read a freed session list head and touch freed DLCs while updating their flags or timers. Serialize the session lookup and DLC traversal in rfcomm_security_cfm() with rfcomm_mutex. This matches the existing RFCOMM session lifetime rules and prevents concurrent rfcomm_session_del() / rfcomm_dlc_unlink() from tearing the objects down while the callback is using them. KASAN reported: BUG: KASAN: slab-use-after-free in rfcomm_security_cfm+0x41c/0x440 Read of size 8 at addr ffff888111fb3960 by task kworker/u17:1/89 Workqueue: hci0 hci_rx_work Call Trace: rfcomm_security_cfm+0x41c/0x440 hci_encrypt_cfm+0x139/0x590 hci_encrypt_change_evt+0x37b/0xc40 hci_event_packet+0x71b/0xb20 hci_rx_work+0x293/0x730 Allocated by task 69: rfcomm_session_add+0x9e/0x2f0 rfcomm_run+0x44b/0x41e0 Freed by task 69: kfree+0x131/0x3c0 rfcomm_session_del+0x188/0x220 rfcomm_run+0x1985/0x41e0
Quoted source text, attributed separately from HOL analysis.