Answer in brief
CVE-2026-23395 records a High severity (CVSS 8.8) vulnerability in Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (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), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=15f02b91056253e8cdc592888f431da0731337b8 <10a7a702542240d5edb2b39450ac951c59ccd009 || >=15f02b91056253e8cdc592888f431da0731337b8 <46e5b71666fb7652082e4e214a3365f4b14f1dc3 || >=15f02b91056253e8cdc592888f431da0731337b8 <fb4a3a26483f3ea2cd21c7a2f7c45d5670600465 || >=15f02b91056253e8cdc592888f431da0731337b8 <2124d82fd25e1671bb3ceb37998af5aae5903e06 || >=15f02b91056253e8cdc592888f431da0731337b8 <6b949a6b33cbdf621d9fc6f0c48ac00915dbf514 || >=15f02b91056253e8cdc592888f431da0731337b8 <8d0d94f8ba5b3a0beec3b0da558b9bea48018117 || >=15f02b91056253e8cdc592888f431da0731337b8 <e72ee455297b794b852e5cea8d2d7bb17312172a || >=15f02b91056253e8cdc592888f431da0731337b8 <5b3e2052334f2ff6d5200e952f4aa66994d09899 | 10a7a702542240d5edb2b39450ac951c59ccd009, 46e5b71666fb7652082e4e214a3365f4b14f1dc3, fb4a3a26483f3ea2cd21c7a2f7c45d5670600465, 2124d82fd25e1671bb3ceb37998af5aae5903e06, 6b949a6b33cbdf621d9fc6f0c48ac00915dbf514, 8d0d94f8ba5b3a0beec3b0da558b9bea48018117, e72ee455297b794b852e5cea8d2d7bb17312172a, 5b3e2052334f2ff6d5200e952f4aa66994d09899 |
| Linux/Linuxgeneric | 5.7 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
Mar 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ Currently the code attempts to accept requests regardless of the command identifier which may cause multiple requests to be marked as pending (FLAG_DEFER_SETUP) which can cause more than L2CAP_ECRED_MAX_CID(5) to be allocated in l2cap_ecred_rsp_defer causing an overflow. The spec is quite clear that the same identifier shall not be used on subsequent requests: 'Within each signaling channel a different Identifier shall be used for each successive request or indication.' https://www.bluetooth.com/wp-content/uploads/Files/Specification/HTML/Core-62/out/en/host/logical-link-control-and-adaptation-protocol-specification.html#UUID-32a25a06-4aa4-c6c7-77c5-dcfe3682355d So this attempts to check if there are any channels pending with the same identifier and rejects if any are found.
Quoted source text, attributed separately from HOL analysis.