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 products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| 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 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 13 | libsoup3 +1 | No fix yet | — |
| Debian 12 | libsoup3 +1 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libsoup3 +1 | No fix yet | — |
| Ubuntu 26.04 LTS | libsoup3 | No fix yet | — |
| Ubuntu 25.10 | libsoup3 +1 | No fix yet | — |
| Ubuntu 24.04 LTS | libsoup3 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | libsoup2.4 | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | libsoup2.4 | No fix yet | — |
| Ubuntu Pro 22.04 LTS | libsoup3 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | libsoup2.4 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | libsoup2.4 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | libsoup2.4 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | libsoup3 +2 | 3.6.5-3.el10_1.9 | RHSA-2026:2182 |
| RHEL 9 | libsoup +1 | 2.72.0-12.el9_7.5 | RHSA-2026:2216 |
| RHEL 8 | libsoup +1 | 2.62.3-13.el8_10 | RHSA-2026:2215 |
| RHEL 8 | spice-client-win +2 | 8.10-7.el8_10 | RHSA-2026:2214 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | libsoup3 +2 | 3.6.5-3.el10_0.14 | RHSA-2026:2006 |
| RHEL 9.6 EUS | libsoup +1 | 2.72.0-10.el9_6.6 | RHSA-2026:2049 |
| RHEL 9.4 EUS | libsoup +1 | 2.72.0-8.el9_4.9 | RHSA-2026:2007 |
| RHEL 9.2 E4S | libsoup +1 | 2.72.0-8.el9_2.10 | RHSA-2026:2005 |
| RHEL 9.0 E4S | libsoup +1 | 2.72.0-8.el9_0.9 | RHSA-2026:2008 |
| RHEL 8.8 TUS | libsoup +1 | 2.62.3-3.el8_8.8 | RHSA-2026:1948 |
| RHEL 8.8 TUS | spice-client-win +2 | 8.10-7.el8_8.1 | RHSA-2026:2528 |
| RHEL 8.8 E4S | libsoup +1 | 2.62.3-3.el8_8.8 | RHSA-2026:1948 |
| RHEL 8.8 E4S | spice-client-win +2 | 8.10-7.el8_8.1 | RHSA-2026:2528 |
| RHEL 8.6 TUS | libsoup +1 | 2.62.3-2.el8_6.8 | RHSA-2026:2512 |
| RHEL 8.6 TUS | spice-client-win +2 | 8.10-7.el8_6.1 | RHSA-2026:2529 |
| RHEL 8.6 E4S | libsoup +1 | 2.62.3-2.el8_6.8 | RHSA-2026:2512 |
| RHEL 8.6 E4S | spice-client-win +2 | 8.10-7.el8_6.1 | RHSA-2026:2529 |
| RHEL 8.6 AUS | libsoup +1 | 2.62.3-2.el8_6.8 | RHSA-2026:2512 |
| RHEL 8.6 AUS | spice-client-win +2 | 8.10-7.el8_6.1 | RHSA-2026:2529 |
| RHEL 8.4 EUS Long Life | libsoup +1 | 2.62.3-2.el8_4.8 | RHSA-2026:2402 |
| RHEL 8.4 EUS Long Life | spice-client-win +2 | 8.10-7.el8_4.1 | RHSA-2026:2514 |
| RHEL 8.4 AUS | libsoup +1 | 2.62.3-2.el8_4.8 | RHSA-2026:2402 |
| RHEL 8.4 AUS | spice-client-win +2 | 8.10-7.el8_4.1 | RHSA-2026:2514 |
| RHEL 8.2 AUS | libsoup +1 | 2.62.3-1.el8_2.8 | RHSA-2026:2396 |
| RHEL 8.2 AUS | spice-client-win +2 | 8.10-7.el8_2.1 | RHSA-2026:2513 |
| RHEL 7 ELS | libsoup +1 | 2.62.2-11.el7_9 | RHSA-2026:2628 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | libsoup3-doc | 3.6.5-3.el10_1.9 | ALSA-2026:2182 |
| AlmaLinux 9 | libsoup +1 | 2.72.0-12.el9_7.5 | ALSA-2026:2216 |
| AlmaLinux 8 | libsoup +1 | 2.62.3-13.el8_10 | ALSA-2026:2215 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | libsoup3 | 3.6.5-3.el10_1.9 | RLSA-2026:2182 |
| Rocky Linux 9 | libsoup | 2.72.0-12.el9_7.5 | RLSA-2026:2216 |
| Rocky Linux 8 | libsoup | 2.62.3-13.el8_10 | RLSA-2026:2215 |
| Rocky Linux 8 | spice-client-win | 8.10-7.el8_10 | RLSA-2026:2214 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libsoup | 3.4.4-150600.3.28.1 | SUSE-SU-2026:0257-1 |
| SLES 15 SP7 | libsoup2 | 2.74.3-150600.4.19.1 | SUSE-SU-2026:0253-1 |
| SLES 15 SP6 | libsoup | 3.4.4-150600.3.28.1 | SUSE-SU-2026:0257-1 |
| SLES 15 SP6 | libsoup2 | 2.74.3-150600.4.19.1 | SUSE-SU-2026:0253-1 |
| SLES 15 SP5 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLES 15 SP5 | libsoup2 | 2.74.2-150400.3.19.1 | SUSE-SU-2026:0258-1 |
| SLES 15 SP4 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLES 15 SP4 | libsoup2 | 2.74.2-150400.3.19.1 | SUSE-SU-2026:0258-1 |
| SLES 12 SP5 | libsoup | 2.62.2-5.26.1 | SUSE-SU-2026:0265-1 |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | libsoup | 3.6.5-160000.3.1 | SUSE-SU-2026:20212-1 |
| SLES for SAP 15 SP6 | libsoup | 3.4.4-150600.3.28.1 | SUSE-SU-2026:0257-1 |
| SLES for SAP 15 SP6 | libsoup2 | 2.74.3-150600.4.19.1 | SUSE-SU-2026:0253-1 |
| SLES for SAP 15 SP5 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLES for SAP 15 SP5 | libsoup2 | 2.74.2-150400.3.19.1 | SUSE-SU-2026:0258-1 |
| SLES for SAP 15 SP4 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLES for SAP 15 SP4 | libsoup2 | 2.74.2-150400.3.19.1 | SUSE-SU-2026:0258-1 |
| SLES 16.0 | libsoup | 3.6.5-160000.3.1 | SUSE-SU-2026:20212-1 |
| SLE Micro 6.2 | libsoup | 3.6.5-160000.3.1 | SUSE-SU-2026:20205-1 |
| SLE Micro 6.1 | libsoup | 3.4.4-slfo.1.1_6.1 | SUSE-SU-2026:20360-1 |
| SLE Micro 6.0 | libsoup | 3.4.2-11.1 | SUSE-SU-2026:20245-1 |
| SLE Micro 5.5 | libsoup2 | 2.74.2-150400.3.19.1 | SUSE-SU-2026:0258-1 |
| SLE Micro 5.4 | libsoup2 | 2.74.2-150400.3.19.1 | SUSE-SU-2026:0258-1 |
| SLE Micro 5.3 | libsoup2 | 2.74.2-150400.3.19.1 | SUSE-SU-2026:0258-1 |
| SLE Micro 5.2 | libsoup | 2.68.4-150200.4.19.1 | SUSE-SU-2026:0151-1 |
| SLE HPC 15 SP5 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLE HPC 15 SP5 | libsoup2 | 2.74.2-150400.3.19.1 | SUSE-SU-2026:0258-1 |
| SLE HPC 15 SP4 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLE HPC 15 SP4 | libsoup2 | 2.74.2-150400.3.19.1 | SUSE-SU-2026:0258-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libsoup | 3.6.5-11.1 | openSUSE-SU-2026:10040-1 |
| openSUSE Tumbleweed | libsoup2 | 2.74.3-14.1 | openSUSE-SU-2026:10041-1 |
| openSUSE Leap 16.0 | libsoup | 3.6.5-160000.3.1 | openSUSE-SU-2026:20142-1 |
| openSUSE Leap 16.0 | libsoup2 | 2.74.3-160000.4.1 | openSUSE-SU-2026:20354-1 |
| openSUSE Leap 15.6 | libsoup | 3.4.4-150600.3.28.1 | SUSE-SU-2026:0257-1 |
| openSUSE Leap 15.6 | libsoup2 | 2.74.3-150600.4.19.1 | SUSE-SU-2026:0253-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libsoup +2 | 2.72.0-6.amzn2023.0.9 | ALAS2023-2026-1392 |
| Amazon Linux 2023 | libsoup3 +2 | 3.6.5-54.amzn2023 | ALAS2023-2026-1393 |
| Amazon Linux 2 | libsoup +1 | 2.56.0-6.amzn2.0.6 | ALAS2-2026-3141 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | libsoup3 +2 | 3.6.5-3.el10_1.9 | ELSA-2026-2182 |
| Oracle Linux 9 | libsoup +1 | 2.72.0-12.el9_7.5 | ELSA-2026-2216 |
| Oracle Linux 8 | libsoup +1 | 2.62.3-13.el8_10 | ELSA-2026-2215 |
| Oracle Linux 7 | libsoup +1 | 2.62.2-2.0.11.el7 | ELSA-2026-2628 |
Advisories 48
- ALSA-2026:2216 Important: libsoup security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:2182 Important: libsoup3 security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:2215 Important: libsoup security update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-0305 Red Hat Enterprise Linux (libsoup): Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- WID-SEC-2026-1730 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 16, 2026
- RHSA-2026:2628 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2528 Red Hat Security Advisory: spice-client-win security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2529 Red Hat Security Advisory: spice-client-win security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2513 Red Hat Security Advisory: spice-client-win security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2514 Red Hat Security Advisory: spice-client-win security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2512 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2402 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2396 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2216 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2215 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2214 Red Hat Security Advisory: spice-client-win security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2182 Red Hat Security Advisory: libsoup3 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2049 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2008 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2006 Red Hat Security Advisory: libsoup3 security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2007 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:2005 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2026:1948 Red Hat Security Advisory: libsoup security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- openSUSE-SU-2026:20354-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:20142-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10041-1 libsoup-2_4-1-2.74.3-14.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10040-1 libsoup-3_0-0-3.6.5-11.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20360-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20245-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20212-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20205-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0253-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0257-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0258-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0211-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0151-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- ELSA-2026-2628 Important: libsoup security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Mar 2, 2026
- RLSA-2026:2216 Important: libsoup security update Rocky Linux Security Advisories · Feb 13, 2026
- RLSA-2026:2215 Important: libsoup security update Rocky Linux Security Advisories · Feb 11, 2026
- RLSA-2026:2214 Important: spice-client-win security update Rocky Linux Security Advisories · Feb 11, 2026
- ELSA-2026-2216 Important: libsoup security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Feb 9, 2026
- ELSA-2026-2215 Important: libsoup security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Feb 9, 2026
- RLSA-2026:2182 Important: libsoup3 security update Rocky Linux Security Advisories · Feb 7, 2026
- ALAS2-2026-3141 Important: libsoup security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Feb 5, 2026
- ALAS2023-2026-1392 Important: libsoup security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 5, 2026
- ALAS2023-2026-1393 Important: libsoup3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 5, 2026
- ELSA-2026-2182 Important: libsoup3 security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Feb 5, 2026
- SUSE-SU-2026:0265-1 Security update for libsoup SUSE / openSUSE Security Updates · Feb 4, 2026
References
- RHSA-2026:1948 vendor-advisory
- RHSA-2026:2005 vendor-advisory
- RHSA-2026:2006 vendor-advisory
- RHSA-2026:2007 vendor-advisory
- RHSA-2026:2008 vendor-advisory
- RHSA-2026:2049 vendor-advisory
- RHSA-2026:2182 vendor-advisory
- RHSA-2026:2214 vendor-advisory
- RHSA-2026:2215 vendor-advisory
- RHSA-2026:2216 vendor-advisory
- RHSA-2026:2396 vendor-advisory
- RHSA-2026:2402 vendor-advisory
- RHSA-2026:2512 vendor-advisory
- RHSA-2026:2513 vendor-advisory
- RHSA-2026:2514 vendor-advisory
- RHSA-2026:2528 vendor-advisory
- RHSA-2026:2529 vendor-advisory
- RHSA-2026:2628 vendor-advisory
- RHSA-2026:2844 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-0719 vdb-entry
- RHBZ#2427906 issue-tracking
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/477