CVE-2026-102559
HIGHCVSS 8.6Description
A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow.
Timeline
Published:September 29th, 2026 6:17 PM
Last modified:November 4th, 2026 10:17 PM
CVSS Scoring
CVSS v3: 8.6 (HIGH)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Affected Software
From NVD CPE configuration data
Vendors
gnomeredhat
Products
libsoupenterprise_linux
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- https://access.redhat.com/errata/RHSA-2026:83384Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:83618Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:84586
- https://access.redhat.com/errata/RHSA-2026:92347
- https://access.redhat.com/errata/RHSA-2026:93445
- https://access.redhat.com/errata/RHSA-2026:93446
- https://access.redhat.com/errata/RHSA-2026:93447
- https://access.redhat.com/errata/RHSA-2026:93465
- https://access.redhat.com/errata/RHSA-2026:93466
- https://access.redhat.com/errata/RHSA-2026:93583
- https://access.redhat.com/errata/RHSA-2026:93716
- https://access.redhat.com/security/cve/CVE-2026-102559Mitigation
- https://bugzilla.redhat.com/show_bug.cgi?id=2543285Issue Tracking
Source: NIST NVD · Data may lag official sources by up to one minute