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CVE-2017-7801
A use-after-free vulnerability can occur while re-computing layout for a "marquee" element during window resizing where the updated style…
Critical9.8EPSS 2.6%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
Description
A use-after-free vulnerability can occur while re-computing layout for a "marquee" element during window resizing where the updated style object is freed while still in use. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Critical9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 2.6% · top 15% of all CVEs (3 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Weakness
- Use-after-free with marquee during window resizing
- CWE-416 (opens in a new tab)Other CVEs with CWE-416
Affected products
Mozilla · Thunderbird
- affected unspecified – < 52.3
Mozilla · Firefox ESR
- affected unspecified – < 52.3
Mozilla · Firefox
- affected unspecified – < 55
References (11)
- https://www.mozilla.org/security/advisories/mfsa2017-19/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.mozilla.org/security/advisories/mfsa2017-20/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-3968 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 100197 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://www.mozilla.org/security/advisories/mfsa2017-18/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2017:2456 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2017:2534 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- 1039124 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- GLSA-201803-14 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1371259 (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-3928 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2017-7801)Record last updated .