vulnerability
Ubuntu: (CVE-2023-40551): shim-signed vulnerability
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:L/AC:L/Au:M/C:P/I:N/A:C) | Jan 29, 2024 | Nov 19, 2024 | Apr 16, 2026 |
Severity
5
CVSS
(AV:L/AC:L/Au:M/C:P/I:N/A:C)
Published
Jan 29, 2024
Added
Nov 19, 2024
Modified
Apr 16, 2026
Description
A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during the system's boot phase.
Solutions
ubuntu-upgrade-shimubuntu-upgrade-shim-signed
Rapid7 Labs
2026 Global Threat Landscape Report
The predictive window has collapsed. Exploitation follows disclosure in days. See how attackers are accelerating and how to stay ahead.