CVE-2018-15978

Flash Player versions 31.0.0.122 and earlier have an out-of-bounds read vulnerability. Successful...

7.5 HighFix available

Flash Player versions 31.0.0.122 and earlier have an out-of-bounds read vulnerability. Successful exploitation could lead to information disclosure.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

7.43%Up 2.8 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Flash Player versions 31.0.0.122 and earlier have an out-of-bounds read vulnerability. Successful exploitation could lead to information disclosure.

Record: CVE-2018-15978
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-125
Updated: 2026-11-02

CVE List No score

Flash Player versions 31.0.0.122 and earlier have an out-of-bounds read vulnerability. Successful exploitation could lead to information disclosure.

Record: CVE-2018-15978
Updated: 2026-11-02

EUVDEUVD-2018-7834 No score

Flash Player versions 31.0.0.122 and earlier have an out-of-bounds read vulnerability. Successful exploitation could lead to information disclosure.

Record: EUVD-2018-7834
Updated: 2026-11-03

GitHub AdvisoriesGHSA-q34p-wrjp-g6wh 7.5

Flash Player versions 31.0.0.122 and earlier have an out-of-bounds read vulnerability. Successful...

Flash Player versions 31.0.0.122 and earlier have an out-of-bounds read vulnerability. Successful exploitation could lead to information disclosure.

Record: GHSA-q34p-wrjp-g6wh
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-125
Updated: 2026-11-02

OSVRHSA-2018:3618 6.5

Red Hat Security Advisory: flash-plugin security update

Record: RHSA-2018:3618
CVSS 3.0: 6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVMGASA-2018-0453 No score

Updated flash-player-plugin packages fix security vulnerability

An important vulnerability in Adobe Flash Player 31.0.0.122 and earlier versions. Successful exploitation could lead to information disclosure. (CVE-2018-15978)

Record: MGASA-2018-0453
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`flash-player-plugin` Mageia:6	before 31.0.0.148-1.mga6.nonfree	31.0.0.148-1.mga6.nonfree
`flash-plugin` Red Hat:rhel_extras:6	before 0:31.0.0.148-1.el6_10	0:31.0.0.148-1.el6_10

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-15978 is a high vulnerability (CVSS 7.5) in Adobe Flash Player, published November 15, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 7.43%, the 94th percentile. Fixed in flash-player-plugin 31.0.0.148-1.mga6.nonfree.

References

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