Vulnerability intelligence

CVE-2026-8863

Oracle Corporation OracleLinux(7.2) shim

Multiple Microsoft-sigend UEFI SHIM bootloaders are vulnerable to SecureBoot bypass. An attacker with administrative privileges or the ability to modify the boot process could use one of the vulnerable shim bootloaders to bypass Secure Boot protections and execute arbitrary code before the operating system loads. Specific UEFI DBX update is required to block these vulnerable boot loaders.

CVSS Score

7.8

High

EPSS — Exploit Probability

0.1%

Riskier than 1% of all CVEs · checked 2026-10-12

Exploitation

Not in CISA KEV

KEV does not include every exploited vulnerability

Remediation

Patch available

Vendor fix published