CVE-2026-23395 (GCVE-0-2026-23395)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:33 – Updated: 2026-03-25 10:33
VLAI?
Title
Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < fb4a3a26483f3ea2cd21c7a2f7c45d5670600465 (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 2124d82fd25e1671bb3ceb37998af5aae5903e06 (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 6b949a6b33cbdf621d9fc6f0c48ac00915dbf514 (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 8d0d94f8ba5b3a0beec3b0da558b9bea48018117 (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < e72ee455297b794b852e5cea8d2d7bb17312172a (git)
Affected: 15f02b91056253e8cdc592888f431da0731337b8 , < 5b3e2052334f2ff6d5200e952f4aa66994d09899 (git)
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    Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.1.167 , ≤ 6.1.* (semver)
Unaffected: 6.6.130 , ≤ 6.6.* (semver)
Unaffected: 6.12.78 , ≤ 6.12.* (semver)
Unaffected: 6.18.20 , ≤ 6.18.* (semver)
Unaffected: 6.19.10 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc5 , ≤ * (original_commit_for_fix)
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}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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