---
title: "Security digest: September 27, 2023"
url: https://erroneo.us/security/2023-09-27/
description: "September 27, 2023 vulnerability digest: 1 brief (libvpx CVE-2023-5217: Exploited VP8 Encoder…). What to patch and who can relax."
type: security-digest-day
section: "Security Digest"
date_published: 2023-09-27
date_modified: 2026-10-23
publisher: erroneo.us
author: erroneo.us Security Desk
license: All rights reserved. Quote with attribution and a link.
---

# Security digest: September 27, 2023

1 editorial brief.

## Take stock

- Check exposure: libvpx CVE-2023-5217: Exploited VP8 Encoder Overflow . Owners of Electron apps or static media binaries built before late September 2023, end-of-life Linux hosts that still use libvpx, and fleets of iPhones or iPads stuck below iOS 16.7.1.
- None of it touches your stack? Then there is nothing to do today. That is a result, not a failure to read carefully.

## Editorial briefs

- **Check exposure** [libvpx CVE-2023-5217: Exploited VP8 Encoder Overflow](https://erroneo.us/security/briefs/libvpx-chrome-cve-2023-5217-vp8-heap-overflow/index.md): Browsers fixed this within days in 2023 and have auto-updated many times since; what is left is stale libvpx copies in Electron apps, old iPhones, end-of-life Linux hosts and statically built media tools.

## Known exploited (CISA KEV)

None.

## Critical advisories

None.

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Source page: https://erroneo.us/security/2023-09-27/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt