Double free in libIEC61850 - CVE-2026-57446
Published: July 7, 2026
Vulnerability identifier: #VU136974
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-57446
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to double free in the MMS ObtainFile task handling when processing a sequence of ObtainFile requests that reuses a stale FILE* handle. A remote attacker can send crafted ObtainFile requests to cause a denial of service.
Only servers with MMS file service and MMS ObtainFile enabled are vulnerable. Exploitation requires a successful ObtainFile request to leave a stale file handle in a reusable task before a later ObtainFile request triggers destination-error cleanup.
Affected software
libIEC61850
How to mitigate CVE-2026-57446
Install security update from vendor's website.
libIEC61850 - update to 1.6.2