CVE-2016-5259

Severity: high (CVSS 8.8 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2016-08-05 · updated 2026-06-17
Weakness: CWE-416

Description

Use-after-free vulnerability in the CanonicalizeXPCOMParticipant function in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code via a script that closes its own Service Worker within a nested sync event loop.

Affected products

Mozilla Firefox: through 47.0.1; 45.1.0, 45.1.1, 45.2.0, 45.3.0
Oracle Corporation Oracle Linux: 5.0, 6, 7

References

http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00029.html
http://rhn.redhat.com/errata/RHSA-2016-1551.html
http://www.debian.org/security/2016/dsa-3640
http://www.mozilla.org/security/announce/2016/mfsa2016-73.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html
http://www.securityfocus.com/bid/92258
http://www.securitytracker.com/id/1036508
http://www.ubuntu.com/usn/USN-3044-1
https://bugzilla.mozilla.org/show_bug.cgi?id=1282992
https://security.gentoo.org/glsa/201701-15
http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00004.html

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