CVE-2017-7784
CVSS v3
9.8
CRITICAL
EPSS Score
3.5 %
exploit probability, as of 2026-10-19
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.
Vendor advisories
Mozilla: Use-after-free with image observers (MFSA 2017-19)
Red Hat Security Advisory: thunderbird security update
Red Hat Security Advisory: firefox security update
Description
A use-after-free vulnerability can occur when reading an image observer during frame reconstruction after the observer has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.
Technical details
- Published
- 2018-06-11
Frequently asked questions
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