CVE-2016-5258

high
Published 2016-08-05 · Modified 2026-05-06
CVSS v3
8.8
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v2
6.8
VIR risk
8.8

Description

Use-after-free vulnerability in the WebRTC socket thread in Mozilla Firefox before 48.0 and Firefox ESR 45.x before 45.3 allows remote attackers to execute arbitrary code by leveraging incorrect free operations on DTLS objects during the shutdown of a WebRTC session.

Predictions

Exploit likelihood
92%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2016-5258

vendor Authored 2026-05-27

Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2016-5258.html

vendor Authored 2026-05-27

Vendor advisory: security@mozilla.org — http://www.mozilla.org/security/announce/2016/mfsa2016-72.html

OS impact

OSVersionStatusFixed in
suse slesaffected
arch archfixed48.0.1-1
debian debiansidfixed48.0-1
debian debianbookwormfixed45.3.0esr-1
debian debianbullseyefixed45.3.0esr-1
debian debianforkyfixed45.3.0esr-1
debian debiantrixiefixed45.3.0esr-1

Application impact

VendorProductVersionsFixed
mozilla mozillafirefox{"endIncluding":"47.0.1"}
mozilla mozillafirefox45.1.0
mozilla mozillafirefox45.1.1
mozilla mozillafirefox45.2.0
mozilla mozillafirefox45.3.0

References

CWEs

CWE-416

Verify integrity in audit chain (admin only). AS-IS.