Detections
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AlmaLinux 8 : firefox (ALSA-2026:76850)
critical Nessus Plugin ID 372041
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Synopsis
The remote AlmaLinux host is missing one or more security updates.Description
The remote AlmaLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2026:76850 advisory.* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Graphics component (CVE-2026-92035)
* firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100832)
* firefox: Use-after-free in the Layout: Text and Fonts component (CVE-2026-100784)
* firefox: thunderbird: Privilege escalation in the DLL Services component (CVE-2026-100801)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Internationalization component (CVE-2026-100794)
* firefox: thunderbird: Privilege escalation in the Address Bar component (CVE-2026-100820)
* firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100777)
* firefox: thunderbird: Information disclosure in the Networking: JAR component (CVE-2026-100766)
* firefox: thunderbird: Use-after-free in the XSLT component (CVE-2026-100779)
* firefox: thunderbird: Privilege escalation in the DOM: Service Workers component (CVE-2026-100807)
* firefox: thunderbird: JIT miscompilation in the JavaScript: WebAssembly component (CVE-2026-100792)
* firefox: Privilege escalation due to use-after-free in the Graphics: WebRender component (CVE-2026-100797)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the XPCOM component (CVE-2026-100819)
* firefox: thunderbird: Use-after-free in the JavaScript: WebAssembly component (CVE-2026-100776)
* firefox: thunderbird: Use-after-free in the Widget component (CVE-2026-100757)
* firefox: Sandbox escape due to use-after-free in the Graphics component (CVE-2026-100786)
* firefox: thunderbird: Information disclosure in the Networking component (CVE-2026-96869)
* firefox: Sandbox escape due to use-after-free in the DOM: Content Processes component (CVE-2026-100770)
* firefox: thunderbird: Use-after-free in the JavaScript: WebAssembly component (CVE-2026-100769)
* firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-100791)
* firefox: thunderbird: Sandbox escape due to use-after-free in the Widget: Gtk component (CVE-2026-100818)
* firefox: thunderbird: Privilege escalation due to incorrect boundary conditions in the Graphics component (CVE-2026-100782)
* firefox: firefox: Sandbox escape via use-after-free in DOM component (CVE-2026-100811)
* firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-100772)
* firefox: thunderbird: Uninitialized memory in the Storage: Quota Manager component (CVE-2026-100759)
* firefox: Sandbox escape due to use-after-free in the DOM: Core & HTML component (CVE-2026-100778)
* firefox: thunderbird: Sandbox escape in the DOM: Navigation component (CVE-2026-100758)
* firefox: thunderbird: Sandbox escape in the Graphics component (CVE-2026-100775)
* firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component (CVE-2026-100781)
* firefox: Use-after-free in the DOM: Core & HTML component (CVE-2026-100774)
* firefox: thunderbird: Same-origin policy bypass in the WebExtensions component (CVE-2026-100803)
* firefox: thunderbird: Use-after-free in the Graphics: Canvas2D component (CVE-2026-100789)
* firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-100785)
* firefox: thunderbird: Site isolation issue in the Panning and Zooming component (CVE-2026-100821)
* firefox: thunderbird: Invalid pointer in the JavaScript: WebAssembly component (CVE-2026-100788)
* firefox: thunderbird: Undefined behavior in the DOM: Streams component (CVE-2026-100771)
* firefox: Sandbox escape due to use-after-free in the DOM: Content Processes component (CVE-2026-100762)
* firefox: thunderbird: Use-after-free in the XSLT component (CVE-2026-100790)
* firefox: thunderbird: Use-after-free in the Storage: IndexedDB component (CVE-2026-100773)
* firefox: thunderbird: Use-after-free in the DOM: Core & HTML component (CVE-2026-100780)
* firefox: thunderbird: Use-after-free in the Networking: Cache component (CVE-2026-100767)
* firefox: thunderbird: Incorrect boundary conditions in the Audio/Video: Playback component (CVE-2026-100756)
* firefox: thunderbird: Uninitialized memory in the Audio/Video component (CVE-2026-100783)
Tenable has extracted the preceding description block directly from the AlmaLinux security advisory.
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Update the affected firefox package.See Also
Plugin Details
Severity: Critical
ID: 372041
File Name: alma_linux_ALSA-2026-76850.nasl
Version: 1.1
Type: Local
Family: Alma Linux Local Security Checks
Published: 10/26/2026
Updated: 10/26/2026
Supported Sensors: Continuous Assessment, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.9
Percentile: 96.42
CVSS v2
Risk Factor: Critical
Base Score: 10
Temporal Score: 7.4
Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C
CVSS Score Source: CVE-2026-92035
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Temporal Score: 8.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS Score Source: CVE-2026-100788
Vulnerability Information
CPE: cpe:/o:alma:linux:8, cpe:/o:alma:linux:8::appstream, cpe:/o:alma:linux:8::baseos, cpe:/o:alma:linux:8::highavailability, cpe:/o:alma:linux:8::nfv, cpe:/o:alma:linux:8::powertools, cpe:/o:alma:linux:8::realtime, cpe:/o:alma:linux:8::resilientstorage, cpe:/o:alma:linux:8::sap, cpe:/o:alma:linux:8::sap_hana, cpe:/o:alma:linux:8::supplementary, p-cpe:/a:alma:linux:firefox
Required KB Items: Host/local_checks_enabled, Host/AlmaLinux/release, Host/AlmaLinux/rpm-list, Host/cpu
Exploit Ease: No known exploits are available
Patch Publication Date: 10/6/2026
Vulnerability Publication Date: 9/15/2026
Reference Information
CVE: CVE-2026-100756, CVE-2026-100757, CVE-2026-100758, CVE-2026-100759, CVE-2026-100762, CVE-2026-100766, CVE-2026-100767, CVE-2026-100769, CVE-2026-100770, CVE-2026-100771, CVE-2026-100772, CVE-2026-100773, CVE-2026-100774, CVE-2026-100775, CVE-2026-100776, CVE-2026-100777, CVE-2026-100778, CVE-2026-100779, CVE-2026-100780, CVE-2026-100781, CVE-2026-100782, CVE-2026-100783, CVE-2026-100784, CVE-2026-100785, CVE-2026-100786, CVE-2026-100788, CVE-2026-100789, CVE-2026-100790, CVE-2026-100791, CVE-2026-100792, CVE-2026-100794, CVE-2026-100797, CVE-2026-100801, CVE-2026-100803, CVE-2026-100807, CVE-2026-100811, CVE-2026-100818, CVE-2026-100819, CVE-2026-100820, CVE-2026-100821, CVE-2026-100832, CVE-2026-92035, CVE-2026-96869