CVE-2022-38478

HIGH 8.8CVE-2022-38478 · Published 22/12/2022 · updated 17/06/2026

In short

CVE-2022-38478 is a HIGH (CVSS 8.8) vulnerability affecting firefox (mozilla), firefox esr (mozilla), thunderbird (mozilla).
Chance of exploitation in the next 30 days (EPSS): 0.94%, higher than 61.0% of all vulnerabilities.
Fix: update to 102.2, 104.0, 91.13 or later.

Package	Affected versions	Patched versions
firefox mozilla	`≥ 102.0, < 102.2< 104.0`	`102.2104.0`
firefox esr mozilla	`< 91.13`	`91.13`
thunderbird mozilla	`≥ 102.0, < 102.2< 91.13`	`102.291.13`

Description

Members the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 103, Firefox ESR 102.1, and Firefox ESR 91.12. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Thunderbird < 102.2, Thunderbird < 91.13, Firefox ESR < 91.13, Firefox ESR < 102.2, and Firefox < 104.

References

bugzilla.mozilla.org/buglist.cgi · Issue Tracking
mozilla.org/security/advisories/mfsa2022-33 · Vendor Advisory
mozilla.org/security/advisories/mfsa2022-34 · Vendor Advisory
mozilla.org/security/advisories/mfsa2022-35 · Vendor Advisory
mozilla.org/security/advisories/mfsa2022-36 · Vendor Advisory
mozilla.org/security/advisories/mfsa2022-37 · Vendor Advisory

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Package

Affected versions

Patched versions

firefox

mozilla

≥ 102.0, < 102.2< 104.0

102.2104.0

firefox esr

mozilla

< 91.13

91.13

thunderbird

mozilla

≥ 102.0, < 102.2< 91.13

102.291.13

Description

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