---
title: "Security digest: November 21, 2023"
url: https://erroneo.us/security/2023-11-21/
description: "November 21, 2023 vulnerability digest: 1 CISA KEV addition (GNU). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2023-11-21
date_modified: 2023-11-21
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: November 21, 2023

1 known exploited (cisa kev) addition.

## Take stock

- Do you run any of these? GNU GNU C Library. They are being exploited in the wild (CISA KEV). Patch or mitigate if you do; CISA’s federal deadline is 2023-12-12.
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Known exploited (CISA KEV)

- [CVE-2023-4911](https://erroneo.us/security/cve/CVE-2023-4911/index.md) GNU GNU C Library: GNU C Library Buffer Overflow Vulnerability (CISA due 2023-12-12)

## Critical advisories

None.

---
Source page: https://erroneo.us/security/2023-11-21/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt