CVE-2026-23395
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
21cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 9 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.7.1,<5.10.253
- cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
- (no CPE)
- osv-coords11 versionspkg:linux/kernelpkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.1
>= 5.7.0, < 6.1.167+ 10 more
- (no CPE)range: >= 5.7.0, < 6.1.167
- (no CPE)range: < 6.4.0-41.1.21.18
- (no CPE)range: < 6.4.0-41.1.21.18
- (no CPE)range: < 6.4.0-41.1
- (no CPE)range: < 6.4.0-41.1
- (no CPE)range: < 6.4.0-41.1
- (no CPE)range: < 6.4.0-41.1
- (no CPE)range: < 6.4.0-41.1
- (no CPE)range: < 6.4.0-41.1
- (no CPE)range: < 6.4.0-41.1
- (no CPE)range: < 6.4.0-41.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/10a7a702542240d5edb2b39450ac951c59ccd009nvdPatch
- git.kernel.org/stable/c/2124d82fd25e1671bb3ceb37998af5aae5903e06nvdPatch
- git.kernel.org/stable/c/46e5b71666fb7652082e4e214a3365f4b14f1dc3nvdPatch
- git.kernel.org/stable/c/5b3e2052334f2ff6d5200e952f4aa66994d09899nvdPatch
- git.kernel.org/stable/c/6b949a6b33cbdf621d9fc6f0c48ac00915dbf514nvdPatch
- git.kernel.org/stable/c/8d0d94f8ba5b3a0beec3b0da558b9bea48018117nvdPatch
- git.kernel.org/stable/c/e72ee455297b794b852e5cea8d2d7bb17312172anvdPatch
- git.kernel.org/stable/c/fb4a3a26483f3ea2cd21c7a2f7c45d5670600465nvdPatch
News mentions
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