🛡️ AZL-40306 — edk2

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

CVE-2022-3996 affecting package edk2 for versions less than 20240223gitedc6681206c1-2

If an X.509 certificate contains a malformed policy constraint and

policy processing is enabled, then a write lock will be taken twice

recursively. On some operating systems (most widely: Windows) this

results in a denial of service when the affected process hangs. Policy

processing being enabled on a publicly facing server is not considered

to be a common setup.

Policy processing is enabled by passing the `-policy'

argument to the command line utilities or by calling the

`X509_VERIFY_PARAM_set1_policies()' function.

Update (31 March 2023): The description of the policy processing enablement

was corrected based on CVE-2023-0466.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

AZL-40306 is recorded against 1 package.

  • edk2 (fixed in 20240223gitedc6681206c1-2)

Timeline and source

Published on 13 December 2022 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2022-12-13
Updated 2026-08-12
Modified 2026-04-21
Fix URL N/A

Affected Packages

Software From version Fixed in
edk2 — 20240223gitedc6681206c1-2

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