Description
A flaw was found in libsoup's SoupServer HTTP Range header processing. The sort_ranges() comparator in soup-message-headers.c truncates a 64-bit subtraction result to 32-bit int, flipping the sign for range offsets differing by more than INT_MAX. This causes silent omission of requested byte ranges from HTTP 206 Partial Content responses on resources larger than approximately 2 GB.
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 | — | — |
| Red Hat | Red Hat OpenShift Container Platform 4 | — | — |
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 | libsoup2.4 | No fix yet | — |
| Ubuntu 26.10 | libsoup3 | 3.6.6-1ubuntu3 | USN-8890-2 |
| Ubuntu 26.04 LTS | libsoup3 | 3.6.6-1ubuntu0.1 | USN-8890-1 |
| Ubuntu 24.04 LTS | libsoup2.4 | 2.74.3-6ubuntu1.9 | USN-8890-1 |
| Ubuntu 24.04 LTS | libsoup3 | 3.4.4-5ubuntu0.9 | USN-8890-1 |
| Ubuntu 22.04 LTS | libsoup2.4 | 2.74.2-3ubuntu0.9 | USN-8890-1 |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | libsoup2.4 | 2.74.3-10.1ubuntu5+esm3 | USN-8890-1 |
| Ubuntu Pro 22.04 LTS | libsoup3 | 3.0.7-0ubuntu1+esm9 | USN-8890-1 |
| Ubuntu Pro 20.04 LTS | libsoup2.4 | 2.70.0-1ubuntu0.5+esm4 | USN-8890-1 |
| Ubuntu Pro 18.04 LTS | libsoup2.4 | 2.62.1-1ubuntu0.4+esm9 | USN-8890-1 |
| Ubuntu Pro 16.04 LTS | libsoup2.4 | 2.52.2-1ubuntu0.3+esm8 | USN-8890-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | libsoup2 | 2.74.3-150600.4.42.1 | SUSE-SU-2026:4703-1 |
| SLES 15 SP6 | libsoup2 | 2.74.3-150600.4.42.1 | SUSE-SU-2026:4703-1 |
| SLES 15 SP5 | libsoup2 | 2.74.3-150400.3.43.1 | SUSE-SU-2026:4739-1 |
| SLES 15 SP4 | libsoup2 | 2.74.3-150400.3.43.1 | SUSE-SU-2026:4739-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP6 | libsoup2 | 2.74.3-150600.4.42.1 | SUSE-SU-2026:4703-1 |
| SLES for SAP 15 SP5 | libsoup2 | 2.74.3-150400.3.43.1 | SUSE-SU-2026:4739-1 |
| SLES for SAP 15 SP4 | libsoup2 | 2.74.3-150400.3.43.1 | SUSE-SU-2026:4739-1 |
| SLE Micro 5.5 | libsoup2 | 2.74.3-150400.3.43.1 | SUSE-SU-2026:4739-1 |
| SLE Micro 5.4 | libsoup2 | 2.74.3-150400.3.43.1 | SUSE-SU-2026:4739-1 |
| SLE Micro 5.3 | libsoup2 | 2.74.3-150400.3.43.1 | SUSE-SU-2026:4739-1 |
| SLE HPC 15 SP5 | libsoup2 | 2.74.3-150400.3.43.1 | SUSE-SU-2026:4739-1 |
| SLE HPC 15 SP4 | libsoup2 | 2.74.3-150400.3.43.1 | SUSE-SU-2026:4739-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libsoup2 | 2.74.3-23.1 | openSUSE-SU-2026:11860-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | libsoup +2 | 2.72.0-6.amzn2023.0.15 | ALAS2023-2026-3154 |
| Amazon Linux 2023 | libsoup3 +2 | 3.7.2-1.amzn2023 | ALAS2023-2026-3144 |
| 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 | 3.4.4-17 | — |
Advisories 8
- USN-8890-2 libsoup3 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- SUSE-SU-2026:4739-1 Security update for libsoup2 SUSE / openSUSE Security Updates · Oct 20, 2026
- SUSE-SU-2026:4703-1 Security update for libsoup2 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
- ALAS2023-2026-3154 Moderate: libsoup security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 12, 2026
- USN-8890-1 libsoup2.4, libsoup3 vulnerabilities Ubuntu Security Notices (USN) · Oct 7, 2026
- ALAS2023-2026-3144 Important: libsoup3 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 28, 2026
- openSUSE-SU-2026:11860-1 libsoup-2_4-1-2.74.3-23.1 on GA media SUSE / openSUSE Security Updates · Sep 24, 2026