Answer in brief
CVE-2026-63976 records a High severity (CVSS 8.8) vulnerability in Bluetooth: l2cap: clear chan->ident on ECRED reconfiguration success. 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.
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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=15f02b91056253e8cdc592888f431da0731337b8 <59f5ecf6ad5c4db6ae81965a96156954a3b0d89a || >=15f02b91056253e8cdc592888f431da0731337b8 <ae0152d77d101c920769934fb102b18de0c6f526 || >=15f02b91056253e8cdc592888f431da0731337b8 <c2afd2613fda90107c5e2fe8e855627451749c78 || >=15f02b91056253e8cdc592888f431da0731337b8 <cc2b4f749de09975bfa06e58bbbad2f6acd4c79c || >=15f02b91056253e8cdc592888f431da0731337b8 <3b5b5f423b4fd23404a393bda8adba3cd6f74ef1 || >=15f02b91056253e8cdc592888f431da0731337b8 <f39049304ba655ffcbb92edbdf8c51a1f1210bed || >=15f02b91056253e8cdc592888f431da0731337b8 <8e7977afaef37c6bd2b2654f1bce6ab40d471147 || >=15f02b91056253e8cdc592888f431da0731337b8 <00e1950716c6ed67d74777b2db286b0fa23b4be9 | 59f5ecf6ad5c4db6ae81965a96156954a3b0d89a, ae0152d77d101c920769934fb102b18de0c6f526, c2afd2613fda90107c5e2fe8e855627451749c78, cc2b4f749de09975bfa06e58bbbad2f6acd4c79c, 3b5b5f423b4fd23404a393bda8adba3cd6f74ef1, f39049304ba655ffcbb92edbdf8c51a1f1210bed, 8e7977afaef37c6bd2b2654f1bce6ab40d471147, 00e1950716c6ed67d74777b2db286b0fa23b4be9 |
| Linux/Linuxgeneric | 5.7 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: clear chan->ident on ECRED reconfiguration success l2cap_ecred_reconf_rsp() returns early on success without clearing chan->ident. Every other L2CAP response handler (l2cap_ecred_conn_rsp, l2cap_le_connect_rsp, l2cap_config_rsp) clears chan->ident after a successful transaction to prevent the channel from matching subsequent responses with the recycled ident value. A remote attacker that completed a reconfiguration as the peer can replay a failure response with the stale ident, causing the kernel to match and destroy the already-established channel via l2cap_chan_del(chan, ECONNRESET). Clear chan->ident for all matching channels on success, and harden the failure path by using l2cap_chan_hold_unless_zero() consistent with other L2CAP handlers (l2cap_le_command_rej, __l2cap_get_chan_by_ident).
Quoted source text, attributed separately from HOL analysis.