CVE-2017-7828
A use-after-free vulnerability can occur when flushing and resizing layout because the "PressShell" object has been freed while still in use.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A use-after-free vulnerability can occur when flushing and resizing layout because the "PressShell" object has been freed while still in use. This results in a potentially exploitable crash during these operations. This vulnerability affects Firefox < 57, Firefox ESR < 52.5, and Thunderbird < 52.5.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.20% probability · 94th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- debian/debian linux · redhat/enterprise linux desktop · redhat/enterprise linux server · redhat/enterprise linux server aus · redhat/enterprise linux server eus · redhat/enterprise linux workstation · mozilla/firefox · mozilla/thunderbird
- Source
- security@mozilla.org
EPSS 7.2% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.securityfocus.com/bid/101832Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039803Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:3247Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3372Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1406750Issue Tracking, Permissions Required, Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1412252Issue Tracking, Permissions Required, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00018.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00001.htmlThird Party Advisory
- https://www.debian.org/security/2017/dsa-4035Third Party Advisory
- https://www.debian.org/security/2017/dsa-4061Third Party Advisory
- https://www.debian.org/security/2017/dsa-4075Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-24/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-25/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-26/Vendor Advisory
- http://www.securityfocus.com/bid/101832Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039803Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2017:3247Third Party Advisory
- https://access.redhat.com/errata/RHSA-2017:3372Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1406750Issue Tracking, Permissions Required, Third Party Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1412252Issue Tracking, Permissions Required, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/11/msg00018.htmlThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2017/12/msg00001.htmlThird Party Advisory
- https://www.debian.org/security/2017/dsa-4035Third Party Advisory
- https://www.debian.org/security/2017/dsa-4061Third Party Advisory
- https://www.debian.org/security/2017/dsa-4075Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-24/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-25/Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2017-26/Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.