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CVE Vulnerabilities

CVE-2017-7801

Use After Free

Published: Jun 11, 2018 | Modified: Nov 25, 2025
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
9.8 CRITICAL
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-7801
CWEhttps://cwe.mitre.org/data/definitions/416.html

A use-after-free vulnerability can occur while re-computing layout for a marquee element during window resizing where the updated style object is freed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
Debian_linuxDebian8.0 (including)8.0 (including)
Debian_linuxDebian9.0 (including)9.0 (including)
Red Hat Enterprise Linux 6RedHatfirefox-0:52.3.0-3.el6_9*
Red Hat Enterprise Linux 6RedHatthunderbird-0:52.3.0-1.el6_9*
Red Hat Enterprise Linux 7RedHatfirefox-0:52.3.0-2.el7_4*
Red Hat Enterprise Linux 7RedHatthunderbird-0:52.3.0-1.el7_4*
FirefoxUbuntuartful*
FirefoxUbuntubionic*
FirefoxUbuntucosmic*
FirefoxUbuntudevel*
FirefoxUbuntudisco*
FirefoxUbuntutrusty*
FirefoxUbuntuupstream*
FirefoxUbuntuxenial*
FirefoxUbuntuzesty*
Mozjs38Ubuntuartful*
Mozjs38Ubuntuzesty*
ThunderbirdUbuntuartful*
ThunderbirdUbuntubionic*
ThunderbirdUbuntucosmic*
ThunderbirdUbuntudevel*
ThunderbirdUbuntudisco*
ThunderbirdUbuntutrusty*
ThunderbirdUbuntuupstream*
ThunderbirdUbuntuxenial*
ThunderbirdUbuntuzesty*

Potential Mitigations

References

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