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Firefox Security Update for Linux Systems

published 5 months ago

Summary

A security update is available for Firefox on Linux systems. This update fixes a critical issue that could allow an attacker to take control of your computer if you visit a malicious website. It's recommended to install the update as soon as possible to ensure your system remains secure.

What to do

Update redhat firefox to version 0:140.11.0-1.el8_10.
Update redhat firefox-debuginfo to version 0:140.11.0-1.el8_10.
Update redhat firefox-debugsource to version 0:140.11.0-1.el8_10.

Affected software

Ecosystem	Vendor	Product	Affected versions
Red Hat:enterprise_linux:8::appstream	redhat	firefox	< 0:140.11.0-1.el8_10 Fix: upgrade to 0:140.11.0-1.el8_10
Red Hat:enterprise_linux:8::appstream	redhat	firefox-debuginfo	< 0:140.11.0-1.el8_10 Fix: upgrade to 0:140.11.0-1.el8_10
Red Hat:enterprise_linux:8::appstream	redhat	firefox-debugsource	< 0:140.11.0-1.el8_10 Fix: upgrade to 0:140.11.0-1.el8_10

Original advisory text

Red Hat Security Advisory: firefox security update

References

https://access.redhat.com/errata/RHSA-2026:21382 Vendor Advisory
https://access.redhat.com/security/updates/classification/#important Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2476469 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2476475 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2476492 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479839 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479840 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479842 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479846 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479847 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479848 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479849 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479852 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479853 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479855 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479860 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479871 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479873 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479876 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479880 Third Party Advisory
https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_21382.... Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-8388 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8388 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8388 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-45/#CVE-2026-8388 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8388 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8388 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8391 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8391 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8391 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-45/#CVE-2026-8391 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8391 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8391 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8401 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8401 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8401 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-45/#CVE-2026-8401 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8401 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8401 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8946 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8946 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8946 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8946 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8946 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8947 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8947 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8947 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8947 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8947 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8950 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8950 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8950 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8950 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8950 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8953 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8953 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8953 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8953 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8953 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8954 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8954 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8954 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8954 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8954 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8955 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8955 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8955 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8955 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8955 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8956 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8956 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8956 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8956 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8956 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8957 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8957 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8957 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8957 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8957 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8958 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8958 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8958 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8958 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8958 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8961 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8961 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8961 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8961 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8961 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8962 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8962 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8962 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8962 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8962 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8968 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8968 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8968 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8968 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8968 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8970 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8970 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8970 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8970 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8970 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8974 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8974 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8974 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8974 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8974 Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-8975 Third Party Advisory
https://www.cve.org/CVERecord?id=CVE-2026-8975 Vendor Advisory
https://nvd.nist.gov/vuln/detail/CVE-2026-8975 Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8975 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2026-51/#CVE-2026-8975 Third Party Advisory

Fix within

Internet-facing 14 days

Internal At next upgrade

Not known to be exploited
Needs hands-on effort to exploit (estimated)
Gives an attacker full control (estimated)

Severity

7.5 High

Timeline

Published28 May 2026

Updated28 May 2026

First seen28 May 2026

Sources

RHSA-2026:21382 · OSV

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