---
id: "CVE-2026-117875"
kind: "vulnerability"
aliases: ["CVE-2026-117875"]
title: "Firefox: use-after-free in scrolling and overflow layout code"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["browsers", "desktop", "firefox", "runtime"]
not_affected_if: ["firefox-159-or-later", "firefox-esr-153.6-or-later"]
published_at: "2026-10-27T14:16:42+00:00"
first_seen_at: "2026-10-27T14:32:21+00:00"
updated_at: "2026-10-27T14:39:10+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-117875", "first_seen_at": "2026-10-27T14:32:21+00:00"}]
---

# Firefox: use-after-free in scrolling and overflow layout code

A use-after-free bug in Firefox's Layout Scrolling and Overflow component lets memory be reused after it is freed. The sources do not say what an attacker can achieve with it beyond memory corruption.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `firefox --version` or check Help > About Firefox and compare with `159` or `153.6` for ESR
- unknown for other checks, the sources do not say

## Fix

- Update Firefox to `159` or later
- Update Firefox ESR to `153.6` or later

## Timeline

- 2026-10-27T14:32:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-117875

## From the sources

Use-after-free in the Layout: Scrolling and Overflow component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.

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