CVE-2026-45836
Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_cb()
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix null-ptr-deref in l2cap_sock_get_sndtimeo_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 the patched version.
- Apply the provided L2CAP socket fix.
- Recompile the kernel if necessary.
- Reboot the system after applying changes.
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-2026-45836.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-45836 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-2026-45836
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-2026-45836 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-45836 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: Arreglo de desreferencia de puntero nulo en l2cap_sock_get_sndtimeo_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) 6.2 up to (excluding) 6.6.140 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.90 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.13 up to (excluding) 5.10.258 Added Reference Type kernel.org: https://git.kernel.org/stable/c/32bd343803d4ba47cc516f9d5f037f01b855d767 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/58dc5e3d8768e121907608e6e196a908512fb083 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/6e8d1a2a677a81caa60cf0aabd4217bd585fbba1 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/78a88d43dab8d23aeef934ed8ce34d40e6b3d613 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/a93d66907dd4d29b65c9797a93784bf61906d6d6 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/cf1fd517f892ded88168df878f834b625133f86d Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e1863e7480feddb90125d0dd5a1b572972d75908 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/fd072f833147b0bc10c43a454624cb99d02f3fc7 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': '8d836d71e2223b8961b21112bb4ce89ef8231682', 'lessThan': 'fd072f833147b0bc10c43a454624cb99d02f3fc7', 'versionType': 'git'}, {'status': 'affected', 'version': '8d836d71e2223b8961b21112bb4ce89ef8231682', 'lessThan': '6e8d1a2a677a81caa60cf0aabd4217bd585fbba1', 'versionType': 'git'}, {'status': 'affected', 'version': '8d836d71e2223b8961b21112bb4ce89ef8231682', 'lessThan': 'e1863e7480feddb90125d0dd5a1b572972d75908', 'versionType': 'git'}, {'status': 'affected', 'version': '8d836d71e2223b8961b21112bb4ce89ef8231682', 'lessThan': 'cf1fd517f892ded88168df878f834b625133f86d', 'versionType': 'git'}, {'status': 'affected', 'version': '8d836d71e2223b8961b21112bb4ce89ef8231682', 'lessThan': '58dc5e3d8768e121907608e6e196a908512fb083', 'versionType': 'git'}, {'status': 'affected', 'version': '8d836d71e2223b8961b21112bb4ce89ef8231682', 'lessThan': '32bd343803d4ba47cc516f9d5f037f01b855d767', 'versionType': 'git'}, {'status': 'affected', 'version': '8d836d71e2223b8961b21112bb4ce89ef8231682', 'lessThan': 'a93d66907dd4d29b65c9797a93784bf61906d6d6', 'versionType': 'git'}, {'status': 'affected', 'version': '8d836d71e2223b8961b21112bb4ce89ef8231682', 'lessThan': '78a88d43dab8d23aeef934ed8ce34d40e6b3d613', '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': '3.13'}, {'status': 'unaffected', 'version': '0', 'lessThan': '3.13', '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': '6.12.90', '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/6e8d1a2a677a81caa60cf0aabd4217bd585fbba1 Added Reference https://git.kernel.org/stable/c/e1863e7480feddb90125d0dd5a1b572972d75908 Added Reference https://git.kernel.org/stable/c/fd072f833147b0bc10c43a454624cb99d02f3fc7 -
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_get_sndtimeo_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/32bd343803d4ba47cc516f9d5f037f01b855d767 Added Reference https://git.kernel.org/stable/c/58dc5e3d8768e121907608e6e196a908512fb083 Added Reference https://git.kernel.org/stable/c/78a88d43dab8d23aeef934ed8ce34d40e6b3d613 Added Reference https://git.kernel.org/stable/c/a93d66907dd4d29b65c9797a93784bf61906d6d6 Added Reference https://git.kernel.org/stable/c/cf1fd517f892ded88168df878f834b625133f86d