CVE-2023-40549
5.5
MEDIUM
CVSS 3.1
EPSS 0.03%
Description
An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and crashing Shim, resulting in a denial of service.
How to fix CVE-2023-40549
To remediate CVE-2023-40549, upgrade the affected package to a fixed version below.
- Debian/shim—upgrade to 15.8-1~deb11u1 or later
Is CVE-2023-40549 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 15.8-1~deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |