# CVE-2026-12549: libsoup3: The fix for CVE-2026-2443 was regressed by a subsequent rework commit that replaced specific overflow checks with a g... CVE-2026-12549 is fixed in 25 products on 1 platform, first by DEBIAN-CVE-2026-12549, released June 22, 2026. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2026-12549 - Priority: Routine - CVSS: 4.8 (medium) - EPSS: 0.0036 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Jun 22, 2026 ## Description The fix for CVE-2026-2443 was regressed by a subsequent rework commit that replaced specific overflow checks with a general signed comparison. When a client sends a Range request with a suffix length exceeding the content size, the resulting negative start value is not properly clamped, leading to malformed HTTP 206 responses and log flooding. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | gir1.2-soup-2.4 Ubuntu 18.04.6 LTS (bionic) | 2.62.1-1ubuntu0.4+esm9 | [gir1.2-soup-2.4 2.62.1-1ubuntu0.4+esm9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-gir1.2-soup-2.4-2.62.1-1ubuntu0.4-esm9.md) | Aug 25, 2026 | | Linux | gir1.2-soup-2.4 Ubuntu 20.04 LTS (focal) | 2.70.0-1ubuntu0.5+esm4 | [gir1.2-soup-2.4 2.70.0-1ubuntu0.5+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-gir1.2-soup-2.4-2.70.0-1ubuntu0.5-esm4.md) | Aug 25, 2026 | | Linux | gir1.2-soup-2.4 Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.9 | [gir1.2-soup-2.4 2.74.2-3ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gir1.2-soup-2.4-2.74.2-3ubuntu0.9.md) | Aug 25, 2026 | | Linux | gir1.2-soup-2.4 Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.9 | [gir1.2-soup-2.4 2.74.3-6ubuntu1.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-soup-2.4-2.74.3-6ubuntu1.9.md) | Aug 25, 2026 | | Linux | gir1.2-soup-2.4 Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm3 | [gir1.2-soup-2.4 2.74.3-10.1ubuntu5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-soup-2.4-2.74.3-10.1ubuntu5-esm3.md) | Aug 25, 2026 | | Linux | gir1.2-soup-3.0 Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm9 | [gir1.2-soup-3.0 3.0.7-0ubuntu1+esm9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-gir1.2-soup-3.0-3.0.7-0ubuntu1-esm9.md) | Sep 4, 2026 | | Linux | gir1.2-soup-3.0 Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.9 | [gir1.2-soup-3.0 3.4.4-5ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-gir1.2-soup-3.0-3.4.4-5ubuntu0.9.md) | Sep 4, 2026 | | Linux | gir1.2-soup-3.0 Ubuntu 26.04.1 LTS (resolute) | 3.6.6-1ubuntu0.1 | [gir1.2-soup-3.0 3.6.6-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-gir1.2-soup-3.0-3.6.6-1ubuntu0.1.md) | Sep 4, 2026 | | Linux | libsoup amzn 2023 | 2.72.0-6.amzn2023.0.15 | [ALAS2023-2026-3154](https://patchblox.com/security/data/fix/linux/alas2023-2026-3154.md) | Nov 7, 2026 | | Linux | libsoup-2.4-1 Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.9 | [libsoup-2.4-1 2.74.3-6ubuntu1.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-2.4-1-2.74.3-6ubuntu1.9.md) | Aug 25, 2026 | | Linux | libsoup-2.4-1 Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm3 | [libsoup-2.4-1 2.74.3-10.1ubuntu5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup-2.4-1-2.74.3-10.1ubuntu5-esm3.md) | Aug 25, 2026 | | Linux | libsoup-3.0-0 Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm9 | [libsoup-3.0-0 3.0.7-0ubuntu1+esm9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup-3.0-0-3.0.7-0ubuntu1-esm9.md) | Sep 4, 2026 | | Linux | libsoup-3.0-0 Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.9 | [libsoup-3.0-0 3.4.4-5ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-3.0-0-3.4.4-5ubuntu0.9.md) | Sep 4, 2026 | | Linux | libsoup-3.0-0 Ubuntu 26.04.1 LTS (resolute) | 3.6.6-1ubuntu0.1 | [libsoup-3.0-0 3.6.6-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup-3.0-0-3.6.6-1ubuntu0.1.md) | Sep 4, 2026 | | Linux | libsoup-3.0-common Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm9 | [libsoup-3.0-common 3.0.7-0ubuntu1+esm9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup-3.0-common-3.0.7-0ubuntu1-esm9.md) | Sep 4, 2026 | | Linux | libsoup-3.0-common Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.9 | [libsoup-3.0-common 3.4.4-5ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-3.0-common-3.4.4-5ubuntu0.9.md) | Sep 4, 2026 | | Linux | libsoup-3.0-common Ubuntu 26.04.1 LTS (resolute) | 3.6.6-1ubuntu0.1 | [libsoup-3.0-common 3.6.6-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup-3.0-common-3.6.6-1ubuntu0.1.md) | Sep 4, 2026 | | Linux | libsoup-3.0-tests Ubuntu 22.04.1 LTS (jammy) | 3.0.7-0ubuntu1+esm9 | [libsoup-3.0-tests 3.0.7-0ubuntu1+esm9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup-3.0-tests-3.0.7-0ubuntu1-esm9.md) | Sep 4, 2026 | | Linux | libsoup-3.0-tests Ubuntu 24.04.5 LTS (noble) | 3.4.4-5ubuntu0.9 | [libsoup-3.0-tests 3.4.4-5ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-3.0-tests-3.4.4-5ubuntu0.9.md) | Sep 4, 2026 | | Linux | libsoup-3.0-tests Ubuntu 26.04.1 LTS (resolute) | 3.6.6-1ubuntu0.1 | [libsoup-3.0-tests 3.6.6-1ubuntu0.1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup-3.0-tests-3.6.6-1ubuntu0.1.md) | Sep 4, 2026 | | Linux | libsoup-debuginfo amzn 2023 | 2.72.0-6.amzn2023.0.15 | [ALAS2023-2026-3154](https://patchblox.com/security/data/fix/linux/alas2023-2026-3154.md) | Nov 7, 2026 | | Linux | libsoup-debugsource amzn 2023 | 2.72.0-6.amzn2023.0.15 | [ALAS2023-2026-3154](https://patchblox.com/security/data/fix/linux/alas2023-2026-3154.md) | Nov 7, 2026 | | Linux | libsoup-devel amzn 2023 | 2.72.0-6.amzn2023.0.15 | [ALAS2023-2026-3154](https://patchblox.com/security/data/fix/linux/alas2023-2026-3154.md) | Nov 7, 2026 | | Linux | libsoup-doc amzn 2023 | 2.72.0-6.amzn2023.0.15 | [ALAS2023-2026-3154](https://patchblox.com/security/data/fix/linux/alas2023-2026-3154.md) | Nov 7, 2026 | | Linux | libsoup-gnome-2.4-1 Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.9 | [libsoup-gnome-2.4-1 2.74.3-6ubuntu1.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup-gnome-2.4-1-2.74.3-6ubuntu1.9.md) | Aug 25, 2026 | | Linux | libsoup-gnome-2.4-1 Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm3 | [libsoup-gnome-2.4-1 2.74.3-10.1ubuntu5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup-gnome-2.4-1-2.74.3-10.1ubuntu5-esm3.md) | Aug 25, 2026 | | Linux | libsoup-gnome2.4-1 Ubuntu 18.04.6 LTS (bionic) | 2.62.1-1ubuntu0.4+esm9 | [libsoup-gnome2.4-1 2.62.1-1ubuntu0.4+esm9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libsoup-gnome2.4-1-2.62.1-1ubuntu0.4-esm9.md) | Aug 25, 2026 | | Linux | libsoup-gnome2.4-1 Ubuntu 20.04 LTS (focal) | 2.70.0-1ubuntu0.5+esm4 | [libsoup-gnome2.4-1 2.70.0-1ubuntu0.5+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsoup-gnome2.4-1-2.70.0-1ubuntu0.5-esm4.md) | Aug 25, 2026 | | Linux | libsoup-gnome2.4-1 Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.9 | [libsoup-gnome2.4-1 2.74.2-3ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup-gnome2.4-1-2.74.2-3ubuntu0.9.md) | Aug 25, 2026 | | Linux | libsoup2.4-1 Ubuntu 18.04.6 LTS (bionic) | 2.62.1-1ubuntu0.4+esm9 | [libsoup2.4-1 2.62.1-1ubuntu0.4+esm9](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libsoup2.4-1-2.62.1-1ubuntu0.4-esm9.md) | Aug 25, 2026 | | Linux | libsoup2.4-1 Ubuntu 20.04 LTS (focal) | 2.70.0-1ubuntu0.5+esm4 | [libsoup2.4-1 2.70.0-1ubuntu0.5+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsoup2.4-1-2.70.0-1ubuntu0.5-esm4.md) | Aug 25, 2026 | | Linux | libsoup2.4-1 Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.9 | [libsoup2.4-1 2.74.2-3ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup2.4-1-2.74.2-3ubuntu0.9.md) | Aug 25, 2026 | | Linux | libsoup2.4-common Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.9 | [libsoup2.4-common 2.74.2-3ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup2.4-common-2.74.2-3ubuntu0.9.md) | Aug 25, 2026 | | Linux | libsoup2.4-common Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.9 | [libsoup2.4-common 2.74.3-6ubuntu1.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup2.4-common-2.74.3-6ubuntu1.9.md) | Aug 25, 2026 | | Linux | libsoup2.4-common Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm3 | [libsoup2.4-common 2.74.3-10.1ubuntu5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup2.4-common-2.74.3-10.1ubuntu5-esm3.md) | Aug 25, 2026 | | Linux | libsoup2.4-tests Ubuntu 20.04 LTS (focal) | 2.70.0-1ubuntu0.5+esm4 | [libsoup2.4-tests 2.70.0-1ubuntu0.5+esm4](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libsoup2.4-tests-2.70.0-1ubuntu0.5-esm4.md) | Aug 25, 2026 | | Linux | libsoup2.4-tests Ubuntu 22.04.1 LTS (jammy) | 2.74.2-3ubuntu0.9 | [libsoup2.4-tests 2.74.2-3ubuntu0.9](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libsoup2.4-tests-2.74.2-3ubuntu0.9.md) | Aug 25, 2026 | | Linux | libsoup2.4-tests Ubuntu 24.04.5 LTS (noble) | 2.74.3-6ubuntu1.9 | [libsoup2.4-tests 2.74.3-6ubuntu1.9](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libsoup2.4-tests-2.74.3-6ubuntu1.9.md) | Aug 25, 2026 | | Linux | libsoup2.4-tests Ubuntu 26.04.1 LTS (resolute) | 2.74.3-10.1ubuntu5+esm3 | [libsoup2.4-tests 2.74.3-10.1ubuntu5+esm3](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libsoup2.4-tests-2.74.3-10.1ubuntu5-esm3.md) | Aug 25, 2026 | | Linux | libsoup3 Debian 14 | 3.8.0-1 | [DEBIAN-CVE-2026-12549](https://patchblox.com/security/data/fix/linux/debian-cve-2026-12549.md) | Jun 22, 2026 | | Linux | libsoup3 Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3 amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | libsoup3-debuginfo Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3-debuginfo amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | libsoup3-debugsource Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3-debugsource amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | libsoup3-devel Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3-devel amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | libsoup3-doc Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | libsoup3-doc amzn 2023 | 3.7.2-1.amzn2023 | [ALAS2023-2026-3144](https://patchblox.com/security/data/fix/linux/alas2023-2026-3144.md) | Sep 28, 2026 | | Linux | mingw32-libsoup3 Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | mingw32-libsoup3-debuginfo Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | mingw64-libsoup3 Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | | Linux | mingw64-libsoup3-debuginfo Fedora 43 | 3.6.6-5.fc43 | [FEDORA-2026-FCE2F41203](https://patchblox.com/security/data/fix/linux/fedora-2026-fce2f41203.md) | Sep 5, 2026 | --- Data as of 2026-11-09T07:25:28Z UTC. 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