CVE-2026-56966
HIGH
Published Nov 10, 2026
Modified Nov 12, 2026
Description
In CommitToBuffer of hal_override_options.bundle.cc, there is a possible way to retain stale direct memory access mappings to secure memory due to a confused deputy. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
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CVSS v3.1 Score
8.4
HIGH
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS — Exploit Prediction
0.0013
Probability of exploitation
0.02%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
References
Frequently Asked Questions
What is CVE-2026-56966? +
In CommitToBuffer of hal_override_options.bundle.cc, there is a possible way to retain stale direct memory access mappings to secure memory due to a confused deputy. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. It has a CVSS v3.1 base score of 8.4 (HIGH).
How severe is CVE-2026-56966? +
CVE-2026-56966 has a CVSS v3.1 score of 8.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0013, placing it in the 0th percentile for exploitation probability.
How do I check if I'm vulnerable to CVE-2026-56966? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.
