Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
15f02b91056253e8cdc592888f431da0731337b8 to < 10a7a702542240d5edb2b39450ac951c59ccd009affected15f02b91056253e8cdc592888f431da0731337b8 to < 46e5b71666fb7652082e4e214a3365f4b14f1dc3affected15f02b91056253e8cdc592888f431da0731337b8 to < fb4a3a26483f3ea2cd21c7a2f7c45d5670600465affected15f02b91056253e8cdc592888f431da0731337b8 to < 2124d82fd25e1671bb3ceb37998af5aae5903e06affected15f02b91056253e8cdc592888f431da0731337b8 to < 6b949a6b33cbdf621d9fc6f0c48ac00915dbf514affected15f02b91056253e8cdc592888f431da0731337b8 to < 8d0d94f8ba5b3a0beec3b0da558b9bea48018117affected15f02b91056253e8cdc592888f431da0731337b8 to < e72ee455297b794b852e5cea8d2d7bb17312172aaffected15f02b91056253e8cdc592888f431da0731337b8 to < 5b3e2052334f2ff6d5200e952f4aa66994d09899affected
Linux Linux
Default version status: affected
5.7affected0 to < 5.7unaffected5.10.253 to ≤ 5.10.*unaffected5.15.203 to ≤ 5.15.*unaffected6.1.167 to ≤ 6.1.*unaffected6.6.130 to ≤ 6.6.*unaffected6.12.78 to ≤ 6.12.*unaffected6.18.20 to ≤ 6.18.*unaffected6.19.10 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/10a7a702542240d5edb2b39450ac951c59ccd009 ↗
- https://git.kernel.org/stable/c/46e5b71666fb7652082e4e214a3365f4b14f1dc3 ↗
- https://git.kernel.org/stable/c/fb4a3a26483f3ea2cd21c7a2f7c45d5670600465 ↗
- https://git.kernel.org/stable/c/2124d82fd25e1671bb3ceb37998af5aae5903e06 ↗
- https://git.kernel.org/stable/c/6b949a6b33cbdf621d9fc6f0c48ac00915dbf514 ↗
- https://git.kernel.org/stable/c/8d0d94f8ba5b3a0beec3b0da558b9bea48018117 ↗
- https://git.kernel.org/stable/c/e72ee455297b794b852e5cea8d2d7bb17312172a ↗
- https://git.kernel.org/stable/c/5b3e2052334f2ff6d5200e952f4aa66994d09899 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗