CVE-2026-45834
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb()
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb().
INFO
Published Date :
May 26, 2026, 5:16 p.m.
Last Modified :
July 24, 2026, 11:10 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the Linux kernel to include the fix.
- Review L2CAP related code for similar issues.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-45834.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45834 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-45834
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-45834 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45834 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Translated by [email protected]
Jul. 24, 2026
Action Type Old Value New Value Added Translation Title: Bluetooth: L2CAP: Fix null-ptr-deref en el kernel de Linux, Description: En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: Bluetooth: L2CAP: Corrección de desreferencia de puntero nulo en l2cap_sock_state_change_cb() Añadir la misma protección NULL ya presente en l2cap_sock_resume_cb() y l2cap_sock_ready_cb(). -
Initial Analysis by [email protected]
Jun. 26, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-476 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.30 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.175 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.209 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.0.7 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.88 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.140 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.1 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/0c17c8832562b2aac288e89cefd0f46074f54bcb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1810e42ff6716f320c7269d5850eca48b07b7427 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/1b1c0da227bf63479bac9982fc8d12df9aaea0fb Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/2ff1a41a912de8517b4482e946dd951b7d80edbf Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/5105f3e6b2df619c635b5f6a49fac131a36c7952 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/85426e97dc72f2088ba6d27e74cd58c3fbd43e31 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a2dcf1a61d056aef15b63c6eae9441344d624389 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/c88c185ae0a1067823661b220aeea613df2c127b Types: Patch -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '89bc500e41fc5b48e0573e6b0d927fc97b8951dc', 'lessThan': '1b1c0da227bf63479bac9982fc8d12df9aaea0fb', 'versionType': 'git'}, {'status': 'affected', 'version': '89bc500e41fc5b48e0573e6b0d927fc97b8951dc', 'lessThan': '85426e97dc72f2088ba6d27e74cd58c3fbd43e31', 'versionType': 'git'}, {'status': 'affected', 'version': '89bc500e41fc5b48e0573e6b0d927fc97b8951dc', 'lessThan': '0c17c8832562b2aac288e89cefd0f46074f54bcb', 'versionType': 'git'}, {'status': 'affected', 'version': '89bc500e41fc5b48e0573e6b0d927fc97b8951dc', 'lessThan': '5105f3e6b2df619c635b5f6a49fac131a36c7952', 'versionType': 'git'}, {'status': 'affected', 'version': '89bc500e41fc5b48e0573e6b0d927fc97b8951dc', 'lessThan': 'c88c185ae0a1067823661b220aeea613df2c127b', 'versionType': 'git'}, {'status': 'affected', 'version': '89bc500e41fc5b48e0573e6b0d927fc97b8951dc', 'lessThan': '1810e42ff6716f320c7269d5850eca48b07b7427', 'versionType': 'git'}, {'status': 'affected', 'version': '89bc500e41fc5b48e0573e6b0d927fc97b8951dc', 'lessThan': 'a2dcf1a61d056aef15b63c6eae9441344d624389', 'versionType': 'git'}, {'status': 'affected', 'version': '89bc500e41fc5b48e0573e6b0d927fc97b8951dc', 'lessThan': '2ff1a41a912de8517b4482e946dd951b7d80edbf', 'versionType': 'git'}], 'programFiles': ['net/bluetooth/l2cap_sock.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '3.1'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.1', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.258', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.209', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.175', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.140', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.88', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.30', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.0.7', 'versionType': 'semver', 'lessThanOrEqual': '7.0.*'}, {'status': 'unaffected', 'version': '7.1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['net/bluetooth/l2cap_sock.c'], 'defaultStatus': 'affected'}] -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Jun. 01, 2026
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/0c17c8832562b2aac288e89cefd0f46074f54bcb Added Reference https://git.kernel.org/stable/c/1b1c0da227bf63479bac9982fc8d12df9aaea0fb Added Reference https://git.kernel.org/stable/c/85426e97dc72f2088ba6d27e74cd58c3fbd43e31 -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 26, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_state_change_cb() Add the same NULL guard already present in l2cap_sock_resume_cb() and l2cap_sock_ready_cb(). Added Reference https://git.kernel.org/stable/c/1810e42ff6716f320c7269d5850eca48b07b7427 Added Reference https://git.kernel.org/stable/c/2ff1a41a912de8517b4482e946dd951b7d80edbf Added Reference https://git.kernel.org/stable/c/5105f3e6b2df619c635b5f6a49fac131a36c7952 Added Reference https://git.kernel.org/stable/c/a2dcf1a61d056aef15b63c6eae9441344d624389 Added Reference https://git.kernel.org/stable/c/c88c185ae0a1067823661b220aeea613df2c127b