CVE-2021-38498 — Use After Free in Mozilla Firefox

CWE-416 — Use After Free13 documents8 sources
Severity
7.5HIGHNVD
OSV8.8
EPSS
0.7%
top 27.96%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedNov 3
Latest updateMay 24

Description

During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 93, Thunderbird < 91.2, and Firefox ESR < 91.2.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages8 packages

▶CVEListV5mozilla/firefoxunspecified — 93
▶NVDmozilla/firefox< 93.0
▶CVEListV5mozilla/firefox_esrunspecified — 91.2
▶Ubuntumozilla/firefox< 93.0+build1-0ubuntu0.18.04.1+1

🔴Vulnerability Details

4
GHSA
GHSA-f7wc-pcqv-5mwm: During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially e↗2022-05-24
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OSV
thunderbird vulnerabilities↗2022-01-21
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CVEList
CVE-2021-38498: During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially e↗2021-11-03
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OSV
CVE-2021-38498: During process shutdown, a document could have caused a use-after-free of a languages service object, leading to memory corruption and a potentially e↗2021-11-03
▶

📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2022-01-21
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Ubuntu
Thunderbird vulnerabilities↗2021-11-03
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Ubuntu
Firefox vulnerabilities↗2021-10-07
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Red Hat
Mozilla: Use-after-free of nsLanguageAtomService object↗2021-10-05
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Debian
CVE-2021-38498: firefox - During process shutdown, a document could have caused a use-after-free of a lang...↗2021
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CVE-2021-38498 — Use After Free in Mozilla Firefox | cvebase