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HIGH

CVE-2022-34484

CVSS v3

8.8

HIGH

EPSS Score

1.0 %

exploit probability, as of 2026-10-22

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • thunderbirdAlmaLinux:9all versions · fixed in 91.11.0-2.el9_0.alma

Vendor advisories

  • CVE-2022-34484 Red Hat Product Security190 products fixed · 4 known affected

    Mozilla: Memory safety bugs fixed in Firefox 102 and Firefox ESR 91.11

    firefox as a component of Red Hat Enterprise Linux 6 · firefox.src as a component of Red Hat Enterprise Linux 6 · thunderbird as a component of Red Hat Enterprise Linux 6

  • RHSA-2022:5482 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: thunderbird security update

  • RHSA-2022:5481 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2022:5479 Red Hat Product Security18 products fixed

    Red Hat Security Advisory: firefox security update

  • RHSA-2022:5480 Red Hat Product Security11 products fixed

    Red Hat Security Advisory: thunderbird security update

  • RHSA-2022:5474 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: firefox security update

7 more advisories

Full record on NVD

Description

The Mozilla Fuzzing Team reported potential vulnerabilities present in Thunderbird 91.10. 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 Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

Technical details

Published
2022-12-22

Frequently asked questions

What is CVE-2022-34484?

The Mozilla Fuzzing Team reported potential vulnerabilities present in Thunderbird 91.10. 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 Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

Is CVE-2022-34484 actively exploited?

Active exploitation of CVE-2022-34484 has not been confirmed. Its EPSS score was 1.0% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-34484?

CVE-2022-34484 has a CVSS v3 base score of 8.8 (HIGH severity).

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