Out-of-bounds read in libIEC61850 - #VU136969
Published: July 7, 2026
Vulnerability identifier: #VU136969
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-125
Exploitation vector: Adjecent network
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 out-of-bounds read in the SV subscriber getter functions when processing a malformed Sampled Values frame with a fixed-width field encoded with an invalid shorter length. A remote attacker can send a specially crafted SV frame to cause a denial of service.
The issue is reachable from the normal subscriber callback path and can be triggered on the same Layer-2 network segment as the subscriber.
Affected software
libIEC61850
Remediation
Install security update from vendor's website.
libIEC61850 - update to 1.6.2