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CVE-2015-1243

20
FAUCET Score

CVE-2015-1243 describes a use-after-free vulnerability within the Blink DOM implementation, specifically in the MutationObserver::disconnect function, affecting Google Chrome versions prior to 42.0.2311.135, as well as canonical, debian, and redhat distributions. This flaw allows remote attackers to trigger a denial of service or potentially other unspecified impacts by attempting to unregister an unregistered MutationObserver object. With a CVSS score of 7.5, this vulnerability is considered highly severe, requiring no authentication and having low attack complexity, potentially leading to partial confidentiality, integrity, and availability impacts. There is currently no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 42.0.2311.87CPE matchmatch criteria
cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
14.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*
15.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.34%
Probability of exploitation in next 30 days
EPSS Percentile
81.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0234 is in the 68th percentile among its peer group of 51,553 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Supplementary for Red Hat Enterprise Linux 6Fixed in: chromium-browser-0:42.0.2311.135-1.el6_6
View patch

Vendor Advisories (1)

redhatCVE-2015-1243Important

chromium-browser: use-after-free in DOM

Jan 28, 2015

References

googlechromereleases.blogspot.com / 2015/04/stable-channel-update_28.html
lists.opensuse.org / opensuse-updates/2015-05/msg00009.html
rhn.redhat.com / errata/RHSA-2015-0921.html
code.google.com / p/chromium/issues/detail
security.gentoo.org / glsa/201506-04
src.chromium.org / viewvc/blink
debian.org / security/2015/dsa-3242
securityfocus.com / bid/74389
securitytracker.com / id/1032234
ubuntu.com / usn/USN-2582-1