libsoup3: The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) bl...
CVE-2026-12478 is fixed in 14 products on 1 platform, first by DEBIAN-CVE-2026-12478, released July 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.
The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-based client when max_incoming_payload_size is set to 0.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| gir1.2-soup-3.0 · Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm10 | gir1.2-soup-3.0 3.0.7-0ubuntu1+esm10 | Sep 30, 2026 |
| gir1.2-soup-3.0 · Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.10 | gir1.2-soup-3.0 3.4.4-5ubuntu0.10 | Sep 30, 2026 |
| gir1.2-soup-3.0 · Ubuntu 26.04.1 LTS (resolute) | 3.6.6-1ubuntu0.2 | gir1.2-soup-3.0 3.6.6-1ubuntu0.2 | Sep 30, 2026 |
| libsoup · amzn 2023 | 2.72.0-6.amzn2023.0.15 | ALAS2023-2026-3154 | Nov 7, 2026 |
| libsoup · opensuse-leap 16.0 | 3.6.6-160000.3.1 | OPENSUSE-SU-2026:21871-1 | Sep 17, 2026 |
| libsoup · sles 15.6 | 3.4.4-150600.3.56.1 | SUSE-SU-2026:4558-1 | Oct 7, 2026 |
| libsoup · sles 15.7 | 3.4.4-150600.3.56.1 | SUSE-SU-2026:4558-1 | Oct 7, 2026 |
| libsoup-3.0-0 · Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm10 | libsoup-3.0-0 3.0.7-0ubuntu1+esm10 | Sep 30, 2026 |
| libsoup-3.0-0 · Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.10 | libsoup-3.0-0 3.4.4-5ubuntu0.10 | Sep 30, 2026 |
| libsoup-3.0-0 · Ubuntu 26.04.1 LTS (resolute) | 3.6.6-1ubuntu0.2 | libsoup-3.0-0 3.6.6-1ubuntu0.2 | Sep 30, 2026 |
| libsoup-3.0-common · Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm10 | libsoup-3.0-common 3.0.7-0ubuntu1+esm10 | Sep 30, 2026 |
| libsoup-3.0-common · Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.10 | libsoup-3.0-common 3.4.4-5ubuntu0.10 | Sep 30, 2026 |
| libsoup-3.0-common · Ubuntu 26.04.1 LTS (resolute) | 3.6.6-1ubuntu0.2 | libsoup-3.0-common 3.6.6-1ubuntu0.2 | Sep 30, 2026 |
| libsoup-3.0-tests · Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm10 | libsoup-3.0-tests 3.0.7-0ubuntu1+esm10 | Sep 30, 2026 |
| libsoup-3.0-tests · Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.10 | libsoup-3.0-tests 3.4.4-5ubuntu0.10 | Sep 30, 2026 |
| libsoup-3.0-tests · Ubuntu 26.04.1 LTS (resolute) | 3.6.6-1ubuntu0.2 | libsoup-3.0-tests 3.6.6-1ubuntu0.2 | Sep 30, 2026 |
| libsoup-debuginfo · amzn 2023 | 2.72.0-6.amzn2023.0.15 | ALAS2023-2026-3154 | Nov 7, 2026 |
| libsoup-debugsource · amzn 2023 | 2.72.0-6.amzn2023.0.15 | ALAS2023-2026-3154 | Nov 7, 2026 |
| libsoup-devel · amzn 2023 | 2.72.0-6.amzn2023.0.15 | ALAS2023-2026-3154 | Nov 7, 2026 |
| libsoup-doc · amzn 2023 | 2.72.0-6.amzn2023.0.15 | ALAS2023-2026-3154 | Nov 7, 2026 |
| libsoup3 · Debian 14 | 3.8.0-1 | DEBIAN-CVE-2026-12478 | Jul 14, 2026 |
| libsoup3 · amzn 2023 | 3.7.2-1.amzn2023 | ALAS2023-2026-3144 | Sep 28, 2026 |
| libsoup3-debuginfo · amzn 2023 | 3.7.2-1.amzn2023 | ALAS2023-2026-3144 | Sep 28, 2026 |
| libsoup3-debugsource · amzn 2023 | 3.7.2-1.amzn2023 | ALAS2023-2026-3144 | Sep 28, 2026 |
| libsoup3-devel · amzn 2023 | 3.7.2-1.amzn2023 | ALAS2023-2026-3144 | Sep 28, 2026 |
| libsoup3-doc · amzn 2023 | 3.7.2-1.amzn2023 | ALAS2023-2026-3144 | Sep 28, 2026 |
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