CVE-2025-1009: Use After Free
First published: Tue Feb 04 2025(Updated: )
An attacker could have caused a use-after-free via crafted XSLT data, leading to a potentially exploitable crash.
Credit: security@mozilla.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mozilla Firefox ESR | <115.20 | 115.20 |
| Mozilla Thunderbird | <135 | 135 |
| Mozilla Firefox | <135 | 135 |
| <128.7 | 128.7 | |
| <128.7 | 128.7 | |
| Mozilla Firefox | <115.20.0 | |
| Mozilla Firefox | <135.0 | |
| Mozilla Firefox | >=128.1.0<128.7.0 | |
| Mozilla Thunderbird | >=128.0.1<128.7.0 | |
| Mozilla Thunderbird | >=131.0<135.0 |
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Reference Links
- https://bugzilla.mozilla.org/show_bug.cgi?id=1936613
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-08/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-11/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-07/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-09/
- https://www.mozilla.org/en-US/security/advisories/mfsa2025-10/
- https://www.mozilla.org/security/advisories/mfsa2025-07/
- https://www.mozilla.org/security/advisories/mfsa2025-08/
- https://www.mozilla.org/security/advisories/mfsa2025-09/
- https://www.mozilla.org/security/advisories/mfsa2025-10/
- https://www.mozilla.org/security/advisories/mfsa2025-11/
- https://access.redhat.com/errata/RHSA-2025:1066
- https://access.redhat.com/errata/RHSA-2025:1133
- https://access.redhat.com/errata/RHSA-2025:1135
- https://access.redhat.com/errata/RHSA-2025:1138
- https://access.redhat.com/errata/RHSA-2025:1136
- https://access.redhat.com/errata/RHSA-2025:1132
- https://access.redhat.com/errata/RHSA-2025:1137
- https://access.redhat.com/errata/RHSA-2025:1139
- https://access.redhat.com/errata/RHSA-2025:1140
- https://bugzilla.redhat.com/show_bug.cgi?id=2343760
Parent vulnerabilities
(Appears in the following advisories)
Peer vulnerabilities
(Found alongside the following vulnerabilities)
Frequently Asked Questions
What is the severity of CVE-2025-1009?
CVE-2025-1009 is considered a potentially exploitable vulnerability due to a use-after-free condition in Firefox and Thunderbird.
How do I fix CVE-2025-1009?
To fix CVE-2025-1009, update Firefox to version 135 or Thunderbird to version 128.7 or higher.
Which versions of Firefox are affected by CVE-2025-1009?
CVE-2025-1009 affects Firefox versions below 135.
Which versions of Thunderbird are affected by CVE-2025-1009?
CVE-2025-1009 affects Thunderbird versions below 128.7.
What types of attacks can CVE-2025-1009 facilitate?
CVE-2025-1009 can facilitate crashes that may be exploited by attackers through crafted XSLT data.
- collector/mozilla-advisory
- source/Mozilla
- agent/software-canonical-lookup
- agent/weakness
- agent/type
- agent/first-publish-date
- agent/author
- agent/references
- agent/source
- agent/description
- agent/severity
- collector/nvd-api
- source/NVD
- agent/last-modified-date
- agent/softwarecombine
- agent/tags
- agent/event
- collector/mitre-cve
- source/MITRE
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2025-1009
- vendor/mozilla
- canonical/mozilla firefox esr
- canonical/mozilla thunderbird
- canonical/mozilla firefox
- version/mozilla firefox/128.1.0
- version/mozilla thunderbird/128.0.1
- version/mozilla thunderbird/131.0