CVE-2022-45405

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-22 · updated 2026-06-17
Weakness: CWE-416

Description

Freeing arbitrary <code>nsIInputStream</code>'s on a different thread than creation could have led to a use-after-free and potentially exploitable crash. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

Affected products

Mozilla Firefox: before 107.0 — fixed in 107.0
Mozilla Firefox ESR: before 102.5 — fixed in 102.5
Mozilla Thunderbird: before 102.5 — fixed in 102.5

How to fix

Upgrade to a fixed version: Mozilla Firefox 107.0; Mozilla Firefox ESR 102.5; Mozilla Thunderbird 102.5. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1791314
https://www.mozilla.org/security/advisories/mfsa2022-47/
https://www.mozilla.org/security/advisories/mfsa2022-48/
https://www.mozilla.org/security/advisories/mfsa2022-49/
https://bugzilla.mozilla.org/show_bug.cgi?id=1791314
https://www.mozilla.org/security/advisories/mfsa2022-47/
https://www.mozilla.org/security/advisories/mfsa2022-48/
https://www.mozilla.org/security/advisories/mfsa2022-49/
https://bugzilla.mozilla.org/show_bug.cgi?id=1791314

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