CVE-2026-109738: Vulnerability in Mozilla Firefox
Description
Use-after-free in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS v3.1
Score 5.4medium
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition within the Audio/Video playback component of Mozilla Firefox. Such a flaw could potentially allow for memory corruption, but specific exploitation details are not provided. Mozilla has released fixes in Firefox 158 and Firefox ESR 153.5 to resolve this issue.
Potential Impact
The vulnerability could lead to memory corruption due to use-after-free in the media playback component, which might be leveraged to cause application crashes or potentially execute arbitrary code. However, no active exploitation has been reported.
Mitigation Recommendations
Users should update to Firefox 158 or later, or Firefox ESR 153.5 or later, where this vulnerability has been fixed. No additional mitigation steps are indicated by the vendor advisories.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:44.487Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","vendor":"Mozilla"}]
Threat ID: 6ace2c482cdf04f65661d53e
Added to database: 10/13/2026, 13:04:08 UTC
Last enriched: 10/13/2026, 13:49:02 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 2
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