USN-7263-1: Firefox vulnerabilities
First published: Tue Feb 11 2025(Updated: )
Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, obtain sensitive information across domains, or execute arbitrary code. (CVE-2025-1011, CVE-2025-1013, CVE-2025-1014, CVE-2025-1016, CVE-2025-1017, CVE-2025-1018, CVE-2025-1019, CVE-2025-1020) Ivan Fratric discovered that Firefox did not properly handle XSLT data, leading to a use-after-free vulnerability. An attacker could potentially exploit this issue to cause a denial of service, or execute arbitrary code. (CVE-2025-1009) Atte Kettunen discovered that Firefox did not properly manage memory in the Custom Highlight API, leading to a use-after-free vulnerability. An attacker could potentially exploit this issue to cause a denial of service, or execute arbitrary code. (CVE-2025-1010) Nils Bars discovered that Firefox did not properly manage memory during concurrent delazification, leading to a use-after-free vulnerability. An attacker could potentially exploit this issue to cause a denial of service, or execute arbitrary code. (CVE-2025-1012)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/firefox | <135.0+build2-0ubuntu0.20.04.1 | 135.0+build2-0ubuntu0.20.04.1 |
| Ubuntu | =20.04 |
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Reference Links
- https://ubuntu.com/security/CVE-2025-1016
- https://ubuntu.com/security/CVE-2025-1020
- https://ubuntu.com/security/CVE-2025-1014
- https://ubuntu.com/security/CVE-2025-1010
- https://ubuntu.com/security/CVE-2025-1017
- https://ubuntu.com/security/CVE-2025-1019
- https://ubuntu.com/security/CVE-2025-1009
- https://ubuntu.com/security/CVE-2025-1013
- https://ubuntu.com/security/CVE-2025-1011
- https://ubuntu.com/security/CVE-2025-1018
- https://ubuntu.com/security/CVE-2025-1012
- https://launchpad.net/ubuntu/+source/firefox/135.0+build2-0ubuntu0.20.04.1
- https://ubuntu.com/security/notices/USN-7263-1 (Advisory)
Child vulnerabilities
(Contains the following vulnerabilities)
Frequently Asked Questions
What is the severity of USN-7263-1?
The severity of USN-7263-1 includes potential denial of service, sensitive information disclosure, and arbitrary code execution.
How do I fix USN-7263-1?
To fix USN-7263-1, update your Firefox installation to version 135.0+build2-0ubuntu0.20.04.1 or later.
Which versions of Firefox are affected by USN-7263-1?
USN-7263-1 affects Firefox versions earlier than 135.0+build2-0ubuntu0.20.04.1.
Can USN-7263-1 lead to data breaches?
Yes, USN-7263-1 could potentially allow attackers to obtain sensitive information across domains.
Is USN-7263-1 an issue in Ubuntu 20.04?
Yes, USN-7263-1 specifically affects users of Ubuntu 20.04 running vulnerable versions of Firefox.
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