Description
A flaw was found in libsoup’s WebSocket frame processing when handling incoming messages. If a non-default configuration is used where the maximum incoming payload size is unset, the library may read memory outside the intended bounds. This can cause unintended memory exposure or a crash. Applications using libsoup’s WebSocket support with this configuration may be impacted.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libsoup | 3.4.4-150600.3.28.1 | SUSE-SU-2026:0894-1, SUSE-SU-2026:0257-1 |
| SLES 15 SP7 | libsoup2 | 2.74.3-150600.4.24.1 | SUSE-SU-2026:0886-1, SUSE-SU-2026:0574-1 |
| SLES 15 SP6 | libsoup | 3.4.4-150600.3.28.1 | SUSE-SU-2026:0257-1 |
| SLES 15 SP6 | libsoup2 | 2.74.3-150600.4.24.1 | SUSE-SU-2026:0574-1 |
| SLES 15 SP5 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLES 15 SP5 | libsoup2 | 2.74.2-150400.3.26.1 | SUSE-SU-2026:0497-1 |
| SLES 15 SP4 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLES 15 SP4 | libsoup2 | 2.74.2-150400.3.26.1 | SUSE-SU-2026:0497-1 |
| SLES 12 SP5 | libsoup | 2.62.2-5.34.1 | SUSE-SU-2026:4690-1, SUSE-SU-2026:1004-1, SUSE-SU-2026:0703-1 |
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 | 2.74.3-150600.4.24.1 | SUSE-SU-2026:0574-1 |
| SLES for SAP 15 SP5 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLES for SAP 15 SP5 | libsoup2 | 2.74.2-150400.3.26.1 | SUSE-SU-2026:0497-1 |
| SLES for SAP 15 SP4 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLES for SAP 15 SP4 | libsoup2 | 2.74.2-150400.3.26.1 | SUSE-SU-2026:0497-1 |
| 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-2026:20737-1, SUSE-SU-2026:20360-1 |
| SLE Micro 6.0 | libsoup | 3.4.2-11.1 | SUSE-SU-2026:22920-1, SUSE-SU-2026:20245-1 |
| SLE Micro 5.5 | libsoup2 | 2.74.2-150400.3.26.1 | SUSE-SU-2026:1179-1, SUSE-SU-2026:0497-1 |
| SLE Micro 5.4 | libsoup2 | 2.74.2-150400.3.26.1 | SUSE-SU-2026:1179-1, SUSE-SU-2026:0497-1 |
| SLE Micro 5.3 | libsoup2 | 2.74.2-150400.3.26.1 | SUSE-SU-2026:1179-1, SUSE-SU-2026:0497-1 |
| SLE Micro 5.2 | libsoup | 2.68.4-150200.4.24.1 | SUSE-SU-2026:0847-1, SUSE-SU-2026:0418-1 |
| SLE HPC 15 SP5 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLE HPC 15 SP5 | libsoup2 | 2.74.2-150400.3.26.1 | SUSE-SU-2026:0497-1 |
| SLE HPC 15 SP4 | libsoup | 3.0.4-150400.3.28.1 | SUSE-SU-2026:0211-1 |
| SLE HPC 15 SP4 | libsoup2 | 2.74.2-150400.3.26.1 | SUSE-SU-2026:0497-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libsoup | 3.6.5-11.1 | openSUSE-SU-2026:10040-1 |
| openSUSE Tumbleweed | libsoup2 | 2.74.3-15.1 | openSUSE-SU-2026:10166-1 |
| 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-2026:0894-1, SUSE-SU-2026:0257-1 |
| openSUSE Leap 15.6 | libsoup2 | 2.74.3-150600.4.24.1 | SUSE-SU-2026:0886-1, SUSE-SU-2026:0574-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libsoup +2 | 2.72.0-6.amzn2023.0.12 | ALAS2023-2026-1758 |
| Amazon Linux 2023 | libsoup3 +2 | 3.6.6-58.amzn2023 | ALAS2023-2026-1778 |
| Amazon Linux 2 | libsoup +1 | 2.56.0-6.amzn2.0.9 | ALAS2-2026-3970 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libsoup | 3.4.4-14 | — |
| Azure Linux 2 (CBL-Mariner) | libsoup | 3.0.4-12 | — |
Advisories 26
- SUSE-SU-2026:4690-1 Security update for libsoup SUSE / openSUSE Security Updates · Oct 17, 2026
- ALAS2-2026-3970 Moderate: libsoup security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 12, 2026
- SUSE-SU-2026:22920-1 Security update for libsoup SUSE / openSUSE Security Updates · Jul 28, 2026
- WID-SEC-2026-1730 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 16, 2026
- ALAS2023-2026-1778 Moderate: libsoup3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 8, 2026
- ALAS2023-2026-1758 Moderate: libsoup security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 26, 2026
- SUSE-SU-2026:1179-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Apr 3, 2026
- SUSE-SU-2026:1004-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 26, 2026
- SUSE-SU-2026:20737-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 24, 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-2026:10166-1 libsoup-2_4-1-2.74.3-15.1 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-2026:0847-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0574-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0497-1 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-2026:0211-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0703-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0894-1 Security update for libsoup SUSE / openSUSE Security Updates · Mar 14, 2026
- SUSE-SU-2026:0886-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Mar 13, 2026
- SUSE-SU-2026:0418-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Feb 11, 2026