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Fencer Vulns
high 8.6

CVE-2026-0719 json

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

published 2026-01-08 10 mo ago modified 2026-11-04 4 d ago also EUVD-2026-1573

cvss
8.6
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 49%
public exploits
0
none known

Summary

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.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:3.6.5-3.el10_1.9
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 0:3.6.5-3.el10_0.14
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.62.2-11.el7_9
  • Red Hat Red Hat Enterprise Linux 8 0:2.62.3-13.el8_10, 0:8.10-7
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:2.62.3-1.el8_2.8, 0:8.10-7.el8_2.1
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.62.3-2.el8_4.8, 0:8.10-7.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.62.3-2.el8_4.8, 0:8.10-7.el8_4.1
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.62.3-2.el8_6.8, 0:8.10-7.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service 0:2.62.3-2.el8_6.8, 0:8.10-7.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions 0:2.62.3-2.el8_6.8, 0:8.10-7.el8_6.1
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.62.3-3.el8_8.8, 0:8.10-7.el8_8.1
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.62.3-3.el8_8.8, 0:8.10-7.el8_8.1
  • Red Hat Red Hat Enterprise Linux 9 0:2.72.0-12.el9_7.5
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:2.72.0-8.el9_0.9
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2.72.0-8.el9_2.10
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:2.72.0-8.el9_4.9
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 0:2.72.0-10.el9_6.6
  • Red Hat Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 1770851052, 1770913862, 1770918006
  • libsoup RHEL 8 2.62.3-13.el8_10
  • libsoup RHEL 9 2.72.0-12.el9_7.5
  • spice-client-win RHEL 8 8.10-7.el8_10
  • spice-client-win-x64 RHEL 8 8.10-7.el8_10
  • spice-client-win-x86 RHEL 8 8.10-7.el8_10
  • libsoup3 RHEL 10.1 3.6.5-3.el10_1.9
  • libsoup RHEL 7 ELS 2.62.2-11.el7_9
  • spice-client-win RHEL 8.6 TUS, RHEL 8.6 E4S, RHEL 8.6 AUS 8.10-7.el8_6.1

red hat advisories RHSA-2026:2628RHSA-2026:2529RHSA-2026:2528RHSA-2026:2513RHSA-2026:2514RHSA-2026:2512

  • libsoup SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 3.6.5-160000.3.1
  • libsoup2 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +8 more 2.74.2-150400.3.19.1
  • libsoup SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 +1 more 3.4.4-150600.3.28.1
  • libsoup2 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Basesystem 15 SP7 +1 more 2.74.3-150600.4.19.1
  • libsoup SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 3.0.4-150400.3.28.1
  • libsoup Linux Micro 6.1 3.4.4-slfo.1.1_6.1
  • libsoup SLE Micro 5.2 2.68.4-150200.4.19.1
  • libsoup Linux Micro 6.0 3.4.2-11.1

suse advisories SUSE-SU-2026:20205-1SUSE-SU-2026:20212-1SUSE-SU-2026:0265-1SUSE-SU-2026:0258-1SUSE-SU-2026:0257-1SUSE-SU-2026:0253-1

  • libsoup2 openSUSE Leap 16.0 2.74.3-160000.4.1
  • libsoup openSUSE Leap 16.0 3.6.5-160000.3.1
  • libsoup openSUSE Tumbleweed 3.6.5-11.1
  • libsoup2 openSUSE Tumbleweed 2.74.3-14.1

opensuse advisories openSUSE-SU-2026:20354-1openSUSE-SU-2026:20142-1openSUSE-SU-2026:10040-1openSUSE-SU-2026:10041-1

  • libsoup AlmaLinux 8 2.62.3-13.el8_10
  • libsoup AlmaLinux 9 2.72.0-12.el9_7.5

almalinux advisories ALSA-2026:2215ALSA-2026:2216

  • libsoup Rocky Linux 9 2.72.0-12.el9_7.5
  • spice-client-win Rocky Linux 8 8.10-7.el8_10
  • libsoup Rocky Linux 8 2.62.3-13.el8_10
  • libsoup3 Rocky Linux 10 3.6.5-3.el10_1.9

rocky linux advisories RLSA-2026:2216RLSA-2026:2214RLSA-2026:2215RLSA-2026:2182

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-0719 updated cvss 8.6

libsoup: Signed to Unsigned Conversion Error Leading to Stack-Based Buffer Overflow in libsoup NTLM Authentication

  • Red Hat Enterprise Linux 6 libsoup
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) spice-client-win 8.10-7.el8_10, spice-client-win-x64 8.10-7.el8_10, spice-client-win-x86 8.10-7.el8_10
    fixed: vendor fix RHSA-2026:2215
  • Red Hat Enterprise Linux AppStream (v. 9) libsoup 2.72.0-12.el9_7.5
    fixed: vendor fix RHSA-2026:2216
  • Red Hat Enterprise Linux AppStream (v. 10) libsoup3 3.6.5-3.el10_1.9
    fixed: vendor fix RHSA-2026:2182
  • Red Hat Enterprise Linux AppStream AUS (v. 8.2) spice-client-win 8.10-7.el8_2.1, spice-client-win-x64 8.10-7.el8_2.1, spice-client-win-x86 8.10-7.el8_2.1
    fixed: vendor fix RHSA-2026:2396
  • Red Hat Enterprise Linux AppStream AUS (v.8.4) spice-client-win 8.10-7.el8_4.1, spice-client-win-x64 8.10-7.el8_4.1, spice-client-win-x86 8.10-7.el8_4.1
    fixed: vendor fix RHSA-2026:2402
  • Red Hat Enterprise Linux AppStream AUS (v.8.6) spice-client-win 8.10-7.el8_6.1, spice-client-win-x64 8.10-7.el8_6.1, spice-client-win-x86 8.10-7.el8_6.1 Red Hat Enterprise Linux AppStream E4S (v.8.6) spice-client-win 8.10-7.el8_6.1, spice-client-win-x64 8.10-7.el8_6.1, spice-client-win-x86 8.10-7.el8_6.1
    fixed: vendor fix RHSA-2026:2512
  • Red Hat Enterprise Linux AppStream E4S (v.8.8) spice-client-win 8.10-7.el8_8.1, spice-client-win-x64 8.10-7.el8_8.1, spice-client-win-x86 8.10-7.el8_8.1
    fixed: vendor fix RHSA-2026:1948
show 21 more
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) libsoup 2.72.0-8.el9_0.9
    fixed: vendor fix RHSA-2026:2008
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) libsoup 2.72.0-8.el9_2.10
    fixed: vendor fix RHSA-2026:2005
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) libsoup3 3.6.5-3.el10_0.14
    fixed: vendor fix RHSA-2026:2006
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) libsoup 2.72.0-8.el9_4.9
    fixed: vendor fix RHSA-2026:2007
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) libsoup 2.72.0-10.el9_6.6
    fixed: vendor fix RHSA-2026:2049
  • Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) spice-client-win 8.10-7.el8_4.1, spice-client-win-x64 8.10-7.el8_4.1, spice-client-win-x86 8.10-7.el8_4.1
    fixed: vendor fix RHSA-2026:2402
  • Red Hat Enterprise Linux AppStream TUS (v.8.6) spice-client-win 8.10-7.el8_6.1, spice-client-win-x64 8.10-7.el8_6.1, spice-client-win-x86 8.10-7.el8_6.1
    fixed: vendor fix RHSA-2026:2512
  • Red Hat Enterprise Linux AppStream TUS (v.8.8) spice-client-win 8.10-7.el8_8.1, spice-client-win-x64 8.10-7.el8_8.1, spice-client-win-x86 8.10-7.el8_8.1
    fixed: vendor fix RHSA-2026:1948
  • Red Hat Enterprise Linux BaseOS (v. 8) libsoup 2.62.3-13.el8_10
    fixed: vendor fix RHSA-2026:2215
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) libsoup 2.62.3-1.el8_2.8
    fixed: vendor fix RHSA-2026:2396
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) libsoup 2.62.3-2.el8_4.8
    fixed: vendor fix RHSA-2026:2402
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) libsoup 2.62.3-2.el8_6.8 Red Hat Enterprise Linux BaseOS E4S (v.8.6) libsoup 2.62.3-2.el8_6.8
    fixed: vendor fix RHSA-2026:2512
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) libsoup 2.62.3-3.el8_8.8
    fixed: vendor fix RHSA-2026:1948
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) libsoup 2.62.3-2.el8_4.8
    fixed: vendor fix RHSA-2026:2402
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) libsoup 2.62.3-2.el8_6.8
    fixed: vendor fix RHSA-2026:2512
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) libsoup 2.62.3-3.el8_8.8
    fixed: vendor fix RHSA-2026:1948
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libsoup3-doc 3.6.5-3.el10_1.9
    fixed: vendor fix RHSA-2026:2182
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libsoup3-doc 3.6.5-3.el10_0.14
    fixed: vendor fix RHSA-2026:2006
  • Red Hat Enterprise Linux Server (v. 7 ELS) libsoup 2.62.2-11.el7_9
    fixed: vendor fix RHSA-2026:2628
  • Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 devspaces 1770851052, devspaces 1770913862, devspaces 1770918006
    fixed: vendor fix RHSA-2026:2844
  • Red Hat OpenShift Dev Spaces (RHOSDS) 3.26 devspaces 1770332067, devspaces 1770404430, devspaces 1770404517, devspaces 1770404535, devspaces 1770494431, devspaces 1770494649, +5 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
9 mo ago

Exploit prediction

0.61% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
CISA ADP 3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  • Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  • Red Hat Red Hat Enterprise Linux 8.6 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service
  • Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat OpenShift Dev Spaces (RHOSDS) 3.26
  • Red Hat Red Hat Enterprise Linux 6

Classification

Weakness
  • CWE-121 Stack-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.