CVE Vulnerabilities

CVE-2022-26381

Use After Free

Published: Dec 22, 2022 | Modified: Dec 30, 2022
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
8.8 IMPORTANT
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM

An attacker could have caused a use-after-free by forcing a text reflow in an SVG object leading to a potentially exploitable crash. This vulnerability affects Firefox < 98, Firefox ESR < 91.7, and Thunderbird < 91.7.

Weakness

Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.

Affected Software

Name Vendor Start Version End Version
Firefox Mozilla * 98.0 (excluding)
Firefox_esr Mozilla * 91.7 (excluding)
Thunderbird Mozilla * 91.7 (excluding)
Firefox Ubuntu bionic *
Firefox Ubuntu devel *
Firefox Ubuntu focal *
Firefox Ubuntu impish *
Firefox Ubuntu jammy *
Firefox Ubuntu kinetic *
Firefox Ubuntu lunar *
Firefox Ubuntu mantic *
Firefox Ubuntu noble *
Firefox Ubuntu trusty *
Firefox Ubuntu upstream *
Firefox Ubuntu xenial *
Firefox-esr Ubuntu trusty *
Firefox-esr Ubuntu upstream *
Firefox-esr Ubuntu xenial *
Mozjs38 Ubuntu bionic *
Mozjs38 Ubuntu esm-apps/bionic *
Mozjs38 Ubuntu upstream *
Mozjs52 Ubuntu bionic *
Mozjs52 Ubuntu esm-apps/focal *
Mozjs52 Ubuntu esm-infra/bionic *
Mozjs52 Ubuntu focal *
Mozjs52 Ubuntu upstream *
Mozjs68 Ubuntu focal *
Mozjs68 Ubuntu upstream *
Mozjs78 Ubuntu esm-apps/jammy *
Mozjs78 Ubuntu impish *
Mozjs78 Ubuntu jammy *
Mozjs78 Ubuntu kinetic *
Mozjs78 Ubuntu lunar *
Mozjs78 Ubuntu upstream *
Thunderbird Ubuntu bionic *
Thunderbird Ubuntu devel *
Thunderbird Ubuntu focal *
Thunderbird Ubuntu impish *
Thunderbird Ubuntu jammy *
Thunderbird Ubuntu kinetic *
Thunderbird Ubuntu lunar *
Thunderbird Ubuntu mantic *
Thunderbird Ubuntu noble *
Thunderbird Ubuntu trusty *
Thunderbird Ubuntu upstream *
Thunderbird Ubuntu xenial *
Red Hat Enterprise Linux 7 RedHat firefox-0:91.7.0-3.el7_9 *
Red Hat Enterprise Linux 7 RedHat thunderbird-0:91.7.0-2.el7_9 *
Red Hat Enterprise Linux 8 RedHat firefox-0:91.7.0-3.el8_5 *
Red Hat Enterprise Linux 8 RedHat thunderbird-0:91.7.0-2.el8_5 *
Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions RedHat firefox-0:91.7.0-3.el8_1 *
Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions RedHat thunderbird-0:91.7.0-2.el8_1 *
Red Hat Enterprise Linux 8.2 Extended Update Support RedHat firefox-0:91.7.0-3.el8_2 *
Red Hat Enterprise Linux 8.2 Extended Update Support RedHat thunderbird-0:91.7.0-2.el8_2 *
Red Hat Enterprise Linux 8.4 Extended Update Support RedHat firefox-0:91.7.0-3.el8_4 *
Red Hat Enterprise Linux 8.4 Extended Update Support RedHat thunderbird-0:91.7.0-2.el8_4 *

Extended Description

The use of previously-freed memory can have any number of adverse consequences, ranging from the corruption of valid data to the execution of arbitrary code, depending on the instantiation and timing of the flaw. The simplest way data corruption may occur involves the system’s reuse of the freed memory. Use-after-free errors have two common and sometimes overlapping causes:

In this scenario, the memory in question is allocated to another pointer validly at some point after it has been freed. The original pointer to the freed memory is used again and points to somewhere within the new allocation. As the data is changed, it corrupts the validly used memory; this induces undefined behavior in the process. If the newly allocated data happens to hold a class, in C++ for example, various function pointers may be scattered within the heap data. If one of these function pointers is overwritten with an address to valid shellcode, execution of arbitrary code can be achieved.

Potential Mitigations

References