cbcvebase.
CVE-2026-23395
published 2026-03-25

CVE-2026-23395: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ Currently the code attempts…

PriorityP347high8.8CVSS 3.1
AVAACLPRNUINSUCHIHAH
EPSS
0.25%
16.4th percentile
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

63 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.19.10-1 (forky)linux 6.19.10-1 (forky)
linuxlinux
linuxlinux>= 15f02b91056253e8cdc592888f431da0731337b8 < 10a7a702542240d5edb2b39450ac951c59ccd00910a7a702542240d5edb2b39450ac951c59ccd009
linuxlinux>= 15f02b91056253e8cdc592888f431da0731337b8 < 46e5b71666fb7652082e4e214a3365f4b14f1dc346e5b71666fb7652082e4e214a3365f4b14f1dc3
linuxlinux>= 15f02b91056253e8cdc592888f431da0731337b8 < fb4a3a26483f3ea2cd21c7a2f7c45d5670600465fb4a3a26483f3ea2cd21c7a2f7c45d5670600465
linuxlinux>= 15f02b91056253e8cdc592888f431da0731337b8 < 2124d82fd25e1671bb3ceb37998af5aae5903e062124d82fd25e1671bb3ceb37998af5aae5903e06
linuxlinux>= 15f02b91056253e8cdc592888f431da0731337b8 < 6b949a6b33cbdf621d9fc6f0c48ac00915dbf5146b949a6b33cbdf621d9fc6f0c48ac00915dbf514
linuxlinux>= 15f02b91056253e8cdc592888f431da0731337b8 < 8d0d94f8ba5b3a0beec3b0da558b9bea480181178d0d94f8ba5b3a0beec3b0da558b9bea48018117
linuxlinux>= 15f02b91056253e8cdc592888f431da0731337b8 < e72ee455297b794b852e5cea8d2d7bb17312172ae72ee455297b794b852e5cea8d2d7bb17312172a
linuxlinux>= 15f02b91056253e8cdc592888f431da0731337b8 < 5b3e2052334f2ff6d5200e952f4aa66994d098995b3e2052334f2ff6d5200e952f4aa66994d09899
linuxlinux_kernel
linuxlinux_kernel
linuxlinux_kernel>= 0 < 6.19.10-16.19.10-1
linuxlinux_kernel>= 5.11 < 5.15.2035.15.203
linuxlinux_kernel>= 5.16 < 6.1.1676.1.167
linuxlinux_kernel>= 5.7.0 < 6.1.1676.1.167
linuxlinux_kernel>= 5.7.1 < 5.10.2535.10.253
linuxlinux_kernel>= 6.13 < 6.18.206.18.20
linuxlinux_kernel>= 6.13.0 < 6.18.206.18.20
linuxlinux_kernel>= 6.19 < 6.19.106.19.10
linuxlinux_kernel>= 6.19.0 < 6.19.106.19.10
linuxlinux_kernel>= 6.2 < 6.6.1306.6.130
linuxlinux_kernel>= 6.2.0 < 6.6.1306.6.130
linuxlinux_kernel>= 6.7 < 6.12.786.12.78
linuxlinux_kernel>= 6.7.0 < 6.12.786.12.78

CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
osv8.8HIGH
vendor_msrc9.1CRITICAL
vendor_debian8.8HIGH
vendor_redhat8.8HIGH
vendor_ubuntu7.1HIGH
vendor_oracle6.1MEDIUM
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