SB2026050872 - Improper resource shutdown or release in Linux kernel net mctp driver
Published: May 8, 2026
Security Bulletin ID
SB2026050872
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper resource shutdown or release (CVE-ID: CVE-2026-43457)
CWE-ID: CWE-404 - Improper Resource Shutdown or Release
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper resource shutdown or release in the mctp i2c receive path when handling received packets while midev->allow_rx is false. A local user can trigger packet reception in this state to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0fb2adbdd5c03e8c9ebcdc48afd414b2724c85eb
- https://git.kernel.org/stable/c/1b1be322342a6b0085bf6ee52235e5ac9834ec25
- https://git.kernel.org/stable/c/1ec54187e1aa40a4cfa2b265e9a311179f24b98d
- https://git.kernel.org/stable/c/9f81be2ab9d8e4744871bfb3e868ef413413829f
- https://git.kernel.org/stable/c/d7900a43b0a314a645ca0a2adf45928dbc7001f4
- https://git.kernel.org/stable/c/e3f5e0f22cfc2371e7471c9fd5b4da78f9df7c69