Vulnerability · Published Dec 22, 2022 · Assigned by mozilla
CVE-2022-38476
High 7.5
In plain English
A high-severity use-after-free in Firefox ESR from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.9%top 41.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A data race could occur in the <code>PK11_ChangePW</code> function, potentially leading to a use-after-free vulnerability. In Firefox, this lock protected the data when a user changed their master password. This vulnerability affects Firefox ESR < 102.2 and Thunderbird < 102.2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | firefox | 91.13.0-1.el8_6.alma | ALSA-2022:6175 |
| AlmaLinux:9 | firefox | 91.13.0-1.el9_0.alma | ALSA-2022:6174 |
| AlmaLinux:8 | thunderbird | 91.13.0-1.el8_6.alma | ALSA-2022:6164 |
| AlmaLinux:9 | thunderbird | 91.13.0-1.el9_0.alma | ALSA-2022:6165 |
| Alpine:v3.20 | firefox-esr | 102.2.0-r0 | ALPINE-CVE-2022-38476 |
| Alpine:v3.21 | firefox-esr | 102.2.0-r0 | ALPINE-CVE-2022-38476 |
| Alpine:v3.22 | firefox-esr | 102.2.0-r0 | ALPINE-CVE-2022-38476 |
| Alpine:v3.23 | firefox-esr | 102.2.0-r0 | ALPINE-CVE-2022-38476 |
| Debian:12 | firefox-esr | 102.2.0esr-1 | DEBIAN-CVE-2022-38476 |
| Debian:13 | firefox-esr | 102.2.0esr-1 | DEBIAN-CVE-2022-38476 |
| Debian:14 | firefox-esr | 102.2.0esr-1 | DEBIAN-CVE-2022-38476 |
| Debian:12 | thunderbird | 1:102.2.0-1 | DEBIAN-CVE-2022-38476 |
| Debian:13 | thunderbird | 1:102.2.0-1 | DEBIAN-CVE-2022-38476 |
| Debian:14 | thunderbird | 1:102.2.0-1 | DEBIAN-CVE-2022-38476 |
| Rocky Linux:8 | firefox | 0:91.13.0-1.el8_6 | RLSA-2022:6175 |
| Rocky Linux:8 | thunderbird | 0:91.13.0-1.el8_6 | RLSA-2022:6164 |
| Ubuntu:22.04:LTS | thunderbird | 1:102.2.2+build1-0ubuntu0.22.04.1 | UBUNTU-CVE-2022-38476 |
| Ubuntu:22.04:LTS | thunderbird | 1:102.2.2+build1-0ubuntu0.22.04.1 | USN-5663-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox ESR | unspecified – before 102.2 |
| Mozilla | Thunderbird | unspecified – before 102.2 |
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H