Integer overflow in Firefox for Android and Mozilla Firefox - CVE-2026-16389

Vulnerability identifier: #VU139009

CSH Severity: Low

CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-16389

CWE-ID: CWE-190

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to integer overflow in the Libraries component in NSS when processing input. A remote attacker can supply crafted input to cause a denial of service.

The advisory also reports incorrect boundary conditions in the same component.

Firefox for Android
Mozilla Firefox
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
Debian Linux
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Desktop Applications Module
Basesystem Module
openSUSE Leap
openEuler
Mozilla Thunderbird
rust-cbindgen-debugsource
rust-cbindgen
rust-cbindgen-debuginfo
nss
nss-debuginfo
nss-debugsource
nss-devel
nss-help
nss-softokn
nss-softokn-devel
nss-util
nss-util-devel
nss (Debian package)
mozilla-nss-certs-32bit
mozilla-nss-sysinit-32bit
mozilla-nss-debuginfo-32bit
libsoftokn3
mozilla-nss
mozilla-nss-sysinit-debuginfo
mozilla-nss-sysinit
mozilla-nss-debuginfo
mozilla-nss-tools-debuginfo
libfreebl3
libsoftokn3-debuginfo
mozilla-nss-certs
mozilla-nss-certs-debuginfo
mozilla-nss-certs-debuginfo-32bit
libsoftokn3-32bit
libfreebl3-debuginfo
libsoftokn3-debuginfo-32bit
mozilla-nss-32bit
mozilla-nss-sysinit-debuginfo-32bit
libfreebl3-debuginfo-32bit
libfreebl3-32bit
mozilla-nss-tools
mozilla-nss-devel
mozilla-nss-debugsource
mozilla-nss-sysinit-32bit-debuginfo
libsoftokn3-64bit
mozilla-nss-certs-64bit-debuginfo
mozilla-nss-sysinit-64bit-debuginfo
mozilla-nss-certs-64bit
mozilla-nss-sysinit-64bit
libsoftokn3-64bit-debuginfo
libfreebl3-64bit-debuginfo
libfreebl3-64bit
mozilla-nss-64bit-debuginfo
mozilla-nss-64bit
libsoftokn3-32bit-debuginfo
mozilla-nss-certs-32bit-debuginfo
libfreebl3-32bit-debuginfo
mozilla-nss-32bit-debuginfo
mozilla-nspr
mozilla-nspr-devel
mozilla-nspr-debugsource
mozilla-nspr-debuginfo
mozilla-nspr-debuginfo-32bit
mozilla-nspr-32bit
mozilla-nspr-32bit-debuginfo
mozilla-nspr-64bit-debuginfo
mozilla-nspr-64bit
MozillaFirefox
MozillaFirefox-debugsource
MozillaFirefox-translations-common
MozillaFirefox-debuginfo
MozillaFirefox-devel
MozillaFirefox-translations-other
MozillaFirefox-branding-upstream
MozillaFirefox-branding-SLE

Install security update from vendor's website.

Firefox for Android - update to 153.0
Mozilla Firefox - update to 153.0
Mozilla Thunderbird - update to 153.0
rust-cbindgen-debugsource - update to 0.29.4+git0-150400.11.3.2
rust-cbindgen - update to 0.29.4+git0-150400.11.3.2
rust-cbindgen-debuginfo - update to 0.29.4+git0-150400.11.3.2
nss - update to 3.94.0-10
nss-debuginfo - update to 3.94.0-10
nss-debugsource - update to 3.94.0-10
nss-devel - update to 3.94.0-10
nss-help - update to 3.94.0-10
nss-softokn - update to 3.94.0-10
nss-softokn-devel - update to 3.94.0-10
nss-util - update to 3.94.0-10
nss-util-devel - update to 3.94.0-10
nss (Debian package) - update to 2:3.110-1+deb13u4
mozilla-nss-certs-32bit - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-sysinit-32bit - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-debuginfo-32bit - update to 3.125-58.147.1
libsoftokn3 - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-sysinit-debuginfo - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-sysinit - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-debuginfo - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-tools-debuginfo - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
libfreebl3 - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
libsoftokn3-debuginfo - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-certs - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-certs-debuginfo - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-certs-debuginfo-32bit - update to 3.125-58.147.1
libsoftokn3-32bit - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
libfreebl3-debuginfo - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
libsoftokn3-debuginfo-32bit - update to 3.125-58.147.1
mozilla-nss-32bit - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-sysinit-debuginfo-32bit - update to 3.125-58.147.1
libfreebl3-debuginfo-32bit - update to 3.125-58.147.1
libfreebl3-32bit - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-tools - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-devel - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-debugsource - addressed in versions 3.125-58.147.1, 3.125-150400.3.74.1
mozilla-nss-sysinit-32bit-debuginfo - update to 3.125-150400.3.74.1
libsoftokn3-64bit - update to 3.125-150400.3.74.1
mozilla-nss-certs-64bit-debuginfo - update to 3.125-150400.3.74.1
mozilla-nss-sysinit-64bit-debuginfo - update to 3.125-150400.3.74.1
mozilla-nss-certs-64bit - update to 3.125-150400.3.74.1
mozilla-nss-sysinit-64bit - update to 3.125-150400.3.74.1
libsoftokn3-64bit-debuginfo - update to 3.125-150400.3.74.1
libfreebl3-64bit-debuginfo - update to 3.125-150400.3.74.1
libfreebl3-64bit - update to 3.125-150400.3.74.1
mozilla-nss-64bit-debuginfo - update to 3.125-150400.3.74.1
mozilla-nss-64bit - update to 3.125-150400.3.74.1
libsoftokn3-32bit-debuginfo - update to 3.125-150400.3.74.1
mozilla-nss-certs-32bit-debuginfo - update to 3.125-150400.3.74.1
libfreebl3-32bit-debuginfo - update to 3.125-150400.3.74.1
mozilla-nss-32bit-debuginfo - update to 3.125-150400.3.74.1
mozilla-nspr - addressed in versions 4.39-19.39.1, 4.39-150400.12.3.1
mozilla-nspr-devel - addressed in versions 4.39-19.39.1, 4.39-150400.12.3.1
mozilla-nspr-debugsource - addressed in versions 4.39-19.39.1, 4.39-150400.12.3.1
mozilla-nspr-debuginfo - addressed in versions 4.39-19.39.1, 4.39-150400.12.3.1
mozilla-nspr-debuginfo-32bit - update to 4.39-19.39.1
mozilla-nspr-32bit - addressed in versions 4.39-19.39.1, 4.39-150400.12.3.1
mozilla-nspr-32bit-debuginfo - update to 4.39-150400.12.3.1
mozilla-nspr-64bit-debuginfo - update to 4.39-150400.12.3.1
mozilla-nspr-64bit - update to 4.39-150400.12.3.1
MozillaFirefox - addressed in versions 153.2.0-118.5.4, 153.2.0-150400.157.5.1
MozillaFirefox-debugsource - addressed in versions 153.2.0-118.5.4, 153.2.0-150400.157.5.1
MozillaFirefox-translations-common - addressed in versions 153.2.0-118.5.4, 153.2.0-150400.157.5.1
MozillaFirefox-debuginfo - addressed in versions 153.2.0-118.5.4, 153.2.0-150400.157.5.1
MozillaFirefox-devel - addressed in versions 153.2.0-118.5.4, 153.2.0-150400.157.5.1
MozillaFirefox-translations-other - update to 153.2.0-150400.157.5.1
MozillaFirefox-branding-upstream - update to 153.2.0-150400.157.5.1
MozillaFirefox-branding-SLE - addressed in versions 153-41.3.8, 153-150400.14.3.1

• https://www.mozilla.org/en-US/security/advisories/mfsa2026-68/
• https://bugzilla.mozilla.org/show_bug.cgi?id=2043887

• Multiple vulnerabilities in Mozilla Firefox
• Multiple vulnerabilities in Mozilla Thunderbird
• Debian update for nss
• openEuler update for nss
• SUSE update for MozillaFirefox, MozillaFirefox-branding-SLE, mozilla-nspr, mozilla-nss, rust-cbindgen
• SUSE update for MozillaFirefox, mozilla-nspr, mozilla-nss, rust-cbindgen