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The HTTP/2 implementation in Mozilla Firefox before 43.0 allows remote attackers to cause a denial of service (integer underflow, assertion failure, and application exit) via a single-byte header frame that triggers incorrect memory allocation.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade linux-seamonkeyUpgrade linux-firefoxUpgrade seamonkeyUpgrade firefoxUpgrade thunderbirdUpgrade libxulUpgrade firefox-esrUpgrade linux-thunderbird | Dec 10, 2025 | Dec 15, 2015 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird. | Oct 30, 2017 | Dec 16, 2015 |
| Mfsa2015 142 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 43.0 | Dec 18, 2015 | Dec 16, 2015 |
| Suse | — | Upgrade MozillaFirefoxUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-other | Jan 4, 2016 | Dec 16, 2015 |
| Ubuntu | — | Upgrade firefox | Dec 18, 2015 | Dec 15, 2015 |
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