SB2026050870 - Race condition in Linux kernel mctp
Published: May 8, 2026
Security Bulletin ID
SB2026050870
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) Race condition (CVE-ID: CVE-2026-43455)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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 resource leak.
The vulnerability exists due to a race condition in mctp_flow_prepare_output() when processing transmit path operations that access key->dev without holding key->lock. A local user can trigger concurrent operations to cause a resource leak.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0695712f3a6f1a48915f95767cfb42077683dcdc
- https://git.kernel.org/stable/c/47893166bc5611ee9a20de6b8d2933b2320fb772
- https://git.kernel.org/stable/c/7d86aa41c073c4e7eb75fd2e674f1fd8f289728a
- https://git.kernel.org/stable/c/86f5334fcb48a5b611c33364ab52ca684d0f6d91
- https://git.kernel.org/stable/c/8d27d9b260dd19c1b519e1a13de6448f9984e30e
- https://git.kernel.org/stable/c/925a5ffd99cddd7a7e41d5ad120c7a2c6d50260f