CVE-2026-0719
Libsoup: signed to unsigned conversion error leading to stack-based buffer overflow in libsoup ntlm authentication
Severity Score
7.5
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
Track*
*SSVC
Descriptions
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.
An update for spice-client-win is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.6 Telecommunications Update Service. Issues addressed include a buffer overflow vulnerability.
*Credits:
Red Hat would like to thank treeplus for reporting this issue.
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:Track*
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2026-01-08 CVE Reserved
- 2026-01-08 CVE Published
- 2026-02-18 EPSS Updated
- 2026-02-26 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-121: Stack-based Buffer Overflow
CAPEC
References (22)
| URL | Tag | Source |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2026-0719 | Vdb Entry | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2427906 | Issue Tracking | |
| https://gitlab.gnome.org/GNOME/libsoup/-/issues/477 |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Oracle Search vendor "Oracle" | Linux Search vendor "Oracle" for product "Linux" | * | - |
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| Red Hat Search vendor "Red Hat" | Enterprise Linux Search vendor "Red Hat" for product "Enterprise Linux" | * | - |
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Aus Search vendor "Redhat" for product "Rhel Aus" | * | - |
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| Redhat Search vendor "Redhat" | Rhel E4s Search vendor "Redhat" for product "Rhel E4s" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Eus Search vendor "Redhat" for product "Rhel Eus" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Eus Long Life Search vendor "Redhat" for product "Rhel Eus Long Life" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Tus Search vendor "Redhat" for product "Rhel Tus" | * | - |
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| Alibabacloud Search vendor "Alibabacloud" | Alibaba Cloud Linux 3 Search vendor "Alibabacloud" for product "Alibaba Cloud Linux 3" | * | - |
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| Alma Search vendor "Alma" | Linux Search vendor "Alma" for product "Linux" | * | - |
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| Amazon Search vendor "Amazon" | Linux Search vendor "Amazon" for product "Linux" | * | - |
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| Canonical Search vendor "Canonical" | Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux" | * | - |
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| Debian Search vendor "Debian" | Debian Linux Search vendor "Debian" for product "Debian Linux" | * | - |
Affected
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| Miracle Search vendor "Miracle" | Linux Search vendor "Miracle" for product "Linux" | * | - |
Affected
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| Opensuse Search vendor "Opensuse" | Leap Search vendor "Opensuse" for product "Leap" | * | - |
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| Oracle Search vendor "Oracle" | Linux Search vendor "Oracle" for product "Linux" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Enterprise Linux Search vendor "Redhat" for product "Enterprise Linux" | * | - |
Affected
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| Redhat Search vendor "Redhat" | Enterprise Linux Eus Search vendor "Redhat" for product "Enterprise Linux Eus" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Aus Search vendor "Redhat" for product "Rhel Aus" | * | - |
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| Redhat Search vendor "Redhat" | Rhel E4s Search vendor "Redhat" for product "Rhel E4s" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Els Search vendor "Redhat" for product "Rhel Els" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Eus Search vendor "Redhat" for product "Rhel Eus" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Eus Long Life Search vendor "Redhat" for product "Rhel Eus Long Life" | * | - |
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| Redhat Search vendor "Redhat" | Rhel Tus Search vendor "Redhat" for product "Rhel Tus" | * | - |
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| Rocky Search vendor "Rocky" | Linux Search vendor "Rocky" for product "Linux" | * | - |
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| Suse Search vendor "Suse" | Sle-module-basesystem Search vendor "Suse" for product "Sle-module-basesystem" | * | - |
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| Suse Search vendor "Suse" | Sle Hpc-espos Search vendor "Suse" for product "Sle Hpc-espos" | * | - |
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| Suse Search vendor "Suse" | Sle Hpc-ltss Search vendor "Suse" for product "Sle Hpc-ltss" | * | - |
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| Suse Search vendor "Suse" | Sle Hpc Search vendor "Suse" for product "Sle Hpc" | * | - |
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| Suse Search vendor "Suse" | Sled Search vendor "Suse" for product "Sled" | * | - |
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| Suse Search vendor "Suse" | Sles-ltss-extended-security Search vendor "Suse" for product "Sles-ltss-extended-security" | * | - |
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| Suse Search vendor "Suse" | Sles-ltss Search vendor "Suse" for product "Sles-ltss" | * | - |
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| Suse Search vendor "Suse" | Sles Search vendor "Suse" for product "Sles" | * | - |
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| Suse Search vendor "Suse" | Sles Sap Search vendor "Suse" for product "Sles Sap" | * | - |
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