CVE-2022-29536

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-04-20 · updated 2026-06-17
Weakness: CWE-787

Description

In GNOME Epiphany before 41.4 and 42.x before 42.2, an HTML document can trigger a client buffer overflow (in ephy_string_shorten in the UI process) via a long page title. The issue occurs because the number of bytes for a UTF-8 ellipsis character is not properly considered.

Affected products

Debian Linux: 10.0, 11.0
Fedoraproject Fedora: 34, 35, 36
GNOME Epiphany: before 41.4; from 42.0 before 42.2 — fixed in 41.4, 42.2

How to fix

Upgrade to a fixed version: GNOME Epiphany 41.4, 42.2. Check the vendor advisory for mitigations.

References

https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1106
https://lists.debian.org/debian-lts-announce/2022/08/msg00006.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLLDMY4JYDZTMZSCPSY23K5YW3SQYUR6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7YWVIUGFRA6GOE3QAPSJJ6EL3DJG5NX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U5K5UPNHVWXDPSMBNSB2645MD2N5CXQS/
https://www.debian.org/security/2022/dsa-5208
https://gitlab.gnome.org/GNOME/epiphany/-/merge_requests/1106
https://lists.debian.org/debian-lts-announce/2022/08/msg00006.html
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GLLDMY4JYDZTMZSCPSY23K5YW3SQYUR6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7YWVIUGFRA6GOE3QAPSJJ6EL3DJG5NX/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U5K5UPNHVWXDPSMBNSB2645MD2N5CXQS/
https://www.debian.org/security/2022/dsa-5208

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