CVE-2015-5123

Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on…

Browse: All 2015 CVEs · All vendors

CVSS score: 9.8 Critical
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA KEV: Yes — actively exploited (added 2022-04-13, remediation due 2022-05-04)
Weakness (CWE): CWE-416
Published: 2015-07-14
Last modified: 2026-06-17
NVD status: Analyzed

Description

Use-after-free vulnerability in the BitmapData class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x through 11.2.202.481 on Linux, and 12.x through 18.0.0.204 on Linux Chrome installations allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted Flash content that overrides a valueOf function, as exploited in the wild in July 2015.

Affected products

redhat enterprise linux desktop
redhat enterprise linux server
redhat enterprise linux server eus
redhat enterprise linux workstation
opensuse evergreen
suse linux enterprise desktop
suse linux enterprise workstation extension
adobe flash player
adobe flash player desktop runtime

Affected ranges per NVD CPE data; confirm exact versions in the vendor advisory.

Required action (CISA)

The impacted product is end-of-life and should be disconnected if still in use. Federal remediation deadline: 2022-05-04.

How to prioritize this

This vulnerability is on the CISA KEV list, meaning it is being actively exploited — treat it as urgent regardless of the raw CVSS number. Use the live CVE lookup for the latest NVD data, and the CVSS 3.1 calculator to model your own environmental score. For the actively exploited vulnerabilities that matter this week, read The Exploit HQ daily security brief.

References

FAQ

Is CVE-2015-5123 actively exploited?

Yes. CISA added CVE-2015-5123 to its Known Exploited Vulnerabilities (KEV) catalog on 2022-04-13, with a federal remediation deadline of 2022-05-04. A KEV listing means real-world exploitation is confirmed, so patching this should be prioritized above many higher-CVSS bugs that aren't being exploited.

What is the CVSS score of CVE-2015-5123?

CVE-2015-5123 has a CVSS base score of 9.8 (Critical). Its vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Related vulnerabilities

Data source: NVD & CISA KEV. Shown as-is; nothing added. Last generated from NVD data — re-check the live tool for updates.