Detections
Analytics
AlmaLinux 8 : firefox (ALSA-2026:21382)
critical Nessus Plugin ID 317939
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-2026:21382 advisory.* firefox: Incorrect boundary conditions in the JavaScript Engine: JIT component (CVE-2026-8388)
* firefox: Other issue in the JavaScript Engine component (CVE-2026-8391)
* firefox: Sandbox escape in the Profile Backup component (CVE-2026-8401)
* firefox: Integer overflow in the Networking: JAR component (CVE-2026-8956)
* firefox: Memory safety bugs fixed in Firefox ESR 115.36, Firefox ESR 140.11 and Firefox 151 (CVE-2026-8975)
* firefox: Privilege escalation in the DOM: Workers component (CVE-2026-8955)
* firefox: Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component (CVE-2026-8968)
* firefox: Incorrect boundary conditions, integer overflow in the Audio/Video component (CVE-2026-8954)
* firefox: Information disclosure, sandbox escape in the Security: Process Sandboxing component (CVE-2026-8958)
* firefox: Incorrect boundary conditions in the Audio/Video: Web Codecs component (CVE-2026-8946)
* firefox: Privilege escalation in the Security component (CVE-2026-8970)
* firefox: Same-origin policy bypass in the Networking: HTTP component (CVE-2026-8950)
* firefox: Memory safety bugs fixed in Firefox ESR 140.11 and Firefox 151 (CVE-2026-8974)
* firefox: Sandbox escape due to use-after-free in the Disability Access APIs component (CVE-2026-8953)
* firefox: Spoofing issue in the Form Autofill component (CVE-2026-8961)
* firefox: Use-after-free in the DOM: Bindings (WebIDL) component (CVE-2026-8947)
* firefox: Mitigation bypass in the DOM: Security component (CVE-2026-8962)
* firefox: Privilege escalation in the Enterprise Policies component (CVE-2026-8957)
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: 317939
File Name: alma_linux_ALSA-2026-21382.nasl
Version: 1.1
Type: Local
Family: Alma Linux Local Security Checks
Published: 5/29/2026
Updated: 5/29/2026
Supported Sensors: Continuous Assessment, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: High
Score: 8.1
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-2026-8975
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-2026-8956
Vulnerability Information
CPE: cpe:/o:alma:linux:8::sap_hana, cpe:/o:alma:linux:8::nfv, cpe:/o:alma:linux:8::highavailability, cpe:/o:alma:linux:8::powertools, cpe:/o:alma:linux:8::realtime, p-cpe:/a:alma:linux:firefox, cpe:/o:alma:linux:8, cpe:/o:alma:linux:8::baseos, cpe:/o:alma:linux:8::resilientstorage, cpe:/o:alma:linux:8::sap, cpe:/o:alma:linux:8::appstream, cpe:/o:alma:linux:8::supplementary
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: 5/27/2026
Vulnerability Publication Date: 5/12/2026
Reference Information
CVE: CVE-2026-8388, CVE-2026-8391, CVE-2026-8401, CVE-2026-8946, CVE-2026-8947, CVE-2026-8950, CVE-2026-8953, CVE-2026-8954, CVE-2026-8955, CVE-2026-8956, CVE-2026-8957, CVE-2026-8958, CVE-2026-8961, CVE-2026-8962, CVE-2026-8968, CVE-2026-8970, CVE-2026-8974, CVE-2026-8975