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

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libsoup是GNOME项目的一款GNOME的HTTP客户端/服务器库。 libsoup存在安全漏洞，该漏洞源于NTLM认证模块中md4sum函数存在栈缓冲区溢出，可能导致执行任意代码。

CVSS 8.6 · High EPSS 0.61% · P48

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 31

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 0:3.6.5-3.el10_1.9< * unaffected
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.6.5-3.el10_0.14< * unaffected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.62.2-11.el7_9< * unaffected
Red Hat Red Hat Enterprise Linux 8 0:8.10-7< * unaffected
0:2.62.3-13.el8_10< * unaffected
0:2.62.3-13.el8_10< * unaffected
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.62.3-1.el8_2.8< * unaffected
0:8.10-7.el8_2.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.62.3-2.el8_4.8< * unaffected
0:8.10-7.el8_4.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.62.3-2.el8_4.8< * unaffected
0:8.10-7.el8_4.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.62.3-2.el8_6.8< * unaffected
0:8.10-7.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.62.3-2.el8_6.8< * unaffected
0:8.10-7.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.62.3-2.el8_6.8< * unaffected
0:8.10-7.el8_6.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.62.3-3.el8_8.8< * unaffected
0:8.10-7.el8_8.1< * unaffected
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.62.3-3.el8_8.8< * unaffected
0:8.10-7.el8_8.1< * unaffected
Red Hat Red Hat Enterprise Linux 9 0:2.72.0-12.el9_7.5< * unaffected
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.72.0-8.el9_0.9< * unaffected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.72.0-8.el9_2.10< * unaffected
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:2.72.0-8.el9_4.9< * unaffected
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.72.0-10.el9_6.6< * unaffected
Red Hat Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 sha256:619c10386e0224e5228876a434c5b8d78d251bc383e2a9491503d6ceddd33c96< * unaffected
sha256:48d31aa446fe1033ad770ed74442053bcee5102035a9c618fb81cde1743a9692< * unaffected
sha256:bb9f0ee4fa785a4c3d4a3f6f5e177f4a41350ccef40bc53bfeedee2d52061472< * unaffected
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I. Basic Information for CVE-2026-0719

Vulnerability Information
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Vulnerability Title
Libsoup: signed to unsigned conversion error leading to stack-based buffer overflow in libsoup ntlm authentication
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
libsoup 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libsoup是GNOME项目的一款GNOME的HTTP客户端/服务器库。 libsoup存在安全漏洞，该漏洞源于NTLM认证模块中md4sum函数存在栈缓冲区溢出，可能导致执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 0:3.6.5-3.el10_1.9 ~ * cpe:/o:redhat:enterprise_linux:10.1
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.6.5-3.el10_0.14 ~ * cpe:/o:redhat:enterprise_linux_eus:10.0
Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.62.2-11.el7_9 ~ * cpe:/o:redhat:rhel_els:7
Red Hat Red Hat Enterprise Linux 8 0:8.10-7 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8 0:2.62.3-13.el8_10 ~ * cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat Red Hat Enterprise Linux 8 0:2.62.3-13.el8_10 ~ * cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.62.3-1.el8_2.8 ~ * cpe:/o:redhat:rhel_aus:8.2::baseos
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:8.10-7.el8_2.1 ~ * cpe:/a:redhat:rhel_aus:8.2::appstream
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.62.3-2.el8_4.8 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:8.10-7.el8_4.1 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.62.3-2.el8_4.8 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:8.10-7.el8_4.1 ~ * cpe:/a:redhat:rhel_aus:8.4::appstream
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.62.3-2.el8_6.8 ~ * cpe:/a:redhat:rhel_e4s:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:8.10-7.el8_6.1 ~ * cpe:/a:redhat:rhel_e4s:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.62.3-2.el8_6.8 ~ * cpe:/a:redhat:rhel_e4s:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:8.10-7.el8_6.1 ~ * cpe:/a:redhat:rhel_e4s:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.62.3-2.el8_6.8 ~ * cpe:/a:redhat:rhel_e4s:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:8.10-7.el8_6.1 ~ * cpe:/a:redhat:rhel_e4s:8.6::appstream
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.62.3-3.el8_8.8 ~ * cpe:/o:redhat:rhel_e4s:8.8::baseos
Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:8.10-7.el8_8.1 ~ * cpe:/a:redhat:rhel_tus:8.8::appstream
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.62.3-3.el8_8.8 ~ * cpe:/o:redhat:rhel_e4s:8.8::baseos
Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:8.10-7.el8_8.1 ~ * cpe:/a:redhat:rhel_tus:8.8::appstream
Red Hat Red Hat Enterprise Linux 9 0:2.72.0-12.el9_7.5 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.72.0-8.el9_0.9 ~ * cpe:/a:redhat:rhel_e4s:9.0::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.72.0-8.el9_2.10 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:2.72.0-8.el9_4.9 ~ * cpe:/a:redhat:rhel_eus:9.4::appstream
Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.72.0-10.el9_6.6 ~ * cpe:/a:redhat:rhel_eus:9.6::appstream
Red Hat Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 sha256:619c10386e0224e5228876a434c5b8d78d251bc383e2a9491503d6ceddd33c96 ~ * cpe:/a:redhat:openshift_devspaces:3.26::el9
Red Hat Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 sha256:48d31aa446fe1033ad770ed74442053bcee5102035a9c618fb81cde1743a9692 ~ * cpe:/a:redhat:openshift_devspaces:3.26::el9
Red Hat Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 sha256:bb9f0ee4fa785a4c3d4a3f6f5e177f4a41350ccef40bc53bfeedee2d52061472 ~ * cpe:/a:redhat:openshift_devspaces:3.26::el9

II. Public POCs for CVE-2026-0719

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-0719

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Vendor Advisories for CVE-2026-0719 (12)

Other References for CVE-2026-0719 (1)

Same Patch Batch · Red Hat · 2026-01-08 · 3 CVEs total

CVE-2025-14025 8.5 HIGH Ansible-automation-platform/aap-gateway: aap-gateway: read-only personal access token (pat
CVE-2026-0707 5.3 MEDIUM Keycloak: keycloak authorization header parsing leading to potential security control bypa

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-121

V. Comments for CVE-2026-0719

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