CVE-2023-40550
5.5
MEDIUM
CVSS 3.1
EPSS 0.02%
Description
An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.
How to fix CVE-2023-40550
To remediate CVE-2023-40550, upgrade the affected package to a fixed version below.
- Debian/shim—upgrade to 15.8-1~deb11u1 or later
Is CVE-2023-40550 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:H/I:N/A:N |