Description
A flaw was identified in the NTLM authentication handling of the libsoup HTTP library, used by GNOME and other applications for network communication. When processing extremely long passwords, an internal size calculation can overflow due to improper use of signed integers. This results in incorrect memory allocation on the stack, followed by unsafe memory copying. As a result, applications using libsoup may crash unexpectedly, creating a denial-of-service risk.
References10
- access.redhat.com/errata/RHSA-2026:1948
- access.redhat.com/errata/RHSA-2026:2005
- access.redhat.com/errata/RHSA-2026:2006
- access.redhat.com/errata/RHSA-2026:2007
- access.redhat.com/errata/RHSA-2026:2008
- access.redhat.com/errata/RHSA-2026:2049
- access.redhat.com/errata/RHSA-2026:2182
- access.redhat.com/errata/RHSA-2026:2214
- access.redhat.com/errata/RHSA-2026:2215
- access.redhat.com/errata/RHSA-2026:2216
Metrics
- CVSS 3.1
-
8.6
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H - EPSS — exploit probability
- 1% percentile: 50 · as of 11 November 2026
- CWE
- CWE-121
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.