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Vulnerability · Published Jan 8, 2026 · Assigned by redhat

CVE-2026-0719Libsoup: signed to unsigned conversion error leading to stack-based buffer overflow in libsoup ntlm authentication

High 8.6

In plain English

A high-severity stack buffer overflow in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.6High
Exploit odds (30 days)0.6%top 50.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8libsoup2.62.3-13.el8_10ALSA-2026:2215
AlmaLinux:9libsoup2.72.0-12.el9_7.5ALSA-2026:2216
AlmaLinux:8libsoup-devel2.62.3-13.el8_10ALSA-2026:2215
AlmaLinux:9libsoup-devel2.72.0-12.el9_7.5ALSA-2026:2216
AlmaLinux:10libsoup3-doc3.6.5-3.el10_1.9ALSA-2026:2182
Debian:12libsoup2.4no fix listedDEBIAN-CVE-2026-0719
Debian:13libsoup2.4no fix listedDEBIAN-CVE-2026-0719
Debian:12libsoup3no fix listedDEBIAN-CVE-2026-0719
Debian:13libsoup3no fix listedDEBIAN-CVE-2026-0719
Rocky Linux:8libsoup0:2.62.3-13.el8_10RLSA-2026:2215
Rocky Linux:9libsoup0:2.72.0-12.el9_7.5RLSA-2026:2216
Rocky Linux:10libsoup30:3.6.5-3.el10_1.9RLSA-2026:2182
Rocky Linux:8spice-client-win0:8.10-7.el8_10RLSA-2026:2214
Ubuntu:22.04:LTSlibsoup2.4no fix listedUBUNTU-CVE-2026-0719
Ubuntu:24.04:LTSlibsoup2.4no fix listedUBUNTU-CVE-2026-0719
Ubuntu:25.10libsoup2.4no fix listedUBUNTU-CVE-2026-0719
Ubuntu:26.10libsoup2.4no fix listedUBUNTU-CVE-2026-0719
Ubuntu:24.04:LTSlibsoup3no fix listedUBUNTU-CVE-2026-0719
Ubuntu:25.10libsoup3no fix listedUBUNTU-CVE-2026-0719
Ubuntu:26.04:LTSlibsoup3no fix listedUBUNTU-CVE-2026-0719
Ubuntu:26.10libsoup3no fix listedUBUNTU-CVE-2026-0719

Affected products (as reported)

VendorProductVersions
Red Hat Red Hat Enterprise Linux 10 see references
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support see references
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support see references
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions see references
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support see references
Red Hat Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 see references
Red Hat Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 see references
Red Hat Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 see references

Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References