# CVE-2025-47287: python3-tornado: Tornado is a Python web framework and asynchronous networking library CVE-2025-47287 is fixed in 10 products on 1 platform, first by python3-tornado 6.1.0-3ubuntu0.1~esm2, released May 15, 2025. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2025-47287 - Priority: High - CVSS: 7.5 (Medium) - EPSS: 0.0075 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: May 15, 2025 ## Description Tornado is a Python web framework and asynchronous networking library. WhenTornado's ``multipart/form-data`` parser encounters certain errors, it logsa warning but continues trying to parse the remainder of the data. Thisallows remote attackers to generate an extremely high volume of logs,constituting a DoS attack. This DoS is compounded by the fact that thelogging subsystem is synchronous. All versions of Tornado prior to 6.5.0are affected. The vulnerable parser is enabled by default. Upgrade toTornado version 6.50 to receive a patch. As a workaround, risk can bemitigated by blocking `Content-Type: multipart/form-data` in a proxy. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | pcs RHEL 8 | 0:0.10.18-2.el8_10.5 | [RHSA-2025:8254](https://patchblox.com/security/data/fix/linux/rhsa-2025-8254.md) | May 28, 2025 | | Linux | pcs almalinux 8 | 0.10.18-2.el8_10.5.alma.1 | [ALSA-2025:8254](https://patchblox.com/security/data/fix/linux/alsa-2025-8254.md) | May 28, 2025 | | Linux | pcs ol 8 | 0:0.10.18-2.0.1.el8_10.5 | [ELSA-2025-8254](https://patchblox.com/security/data/fix/linux/elsa-2025-8254.md) | May 28, 2025 | | Linux | pcs rocky 8 | 0:0.10.18-2.el8_10.5 | [RLSA-2025:8254](https://patchblox.com/security/data/fix/linux/rlsa-2025-8254.md) | Jul 29, 2025 | | Linux | pcs-snmp RHEL 8 | 0:0.10.18-2.el8_10.5 | [RHSA-2025:8254](https://patchblox.com/security/data/fix/linux/rhsa-2025-8254.md) | May 28, 2025 | | Linux | pcs-snmp almalinux 8 | 0.10.18-2.el8_10.5.alma.1 | [ALSA-2025:8254](https://patchblox.com/security/data/fix/linux/alsa-2025-8254.md) | May 28, 2025 | | Linux | pcs-snmp ol 8 | 0:0.10.18-2.0.1.el8_10.5 | [ELSA-2025-8254](https://patchblox.com/security/data/fix/linux/elsa-2025-8254.md) | May 28, 2025 | | Linux | python-tornado Debian 11.6 (bullseye) | 6.1.0-1+deb11u2 | [DLA-4188-1](https://patchblox.com/security/data/fix/linux/dla-4188-1.md) | May 29, 2025 | | Linux | python-tornado Debian 12.15 (bookworm) | 6.2.0-3+deb12u2 | [DSA-5938-1](https://patchblox.com/security/data/fix/linux/dsa-5938-1.md) | Jun 6, 2025 | | Linux | python-tornado Debian 13.5 (trixie) | 6.4.2-2 | [DEBIAN-CVE-2025-47287](https://patchblox.com/security/data/fix/linux/debian-cve-2025-47287.md) | May 15, 2025 | | Linux | python-tornado Debian 14 | 6.4.2-2 | [DEBIAN-CVE-2025-47287](https://patchblox.com/security/data/fix/linux/debian-cve-2025-47287.md) | May 15, 2025 | | Linux | python-tornado RHEL 10 | 6.4.2-1.el10_0.1 | [RHSA-2025:8135](https://patchblox.com/security/data/fix/linux/rhsa-2025-8135.md) | May 15, 2025 | | Linux | python-tornado rocky 10 | 0:6.4.2-1.el10_0.1 | [RLSA-2025:8135](https://patchblox.com/security/data/fix/linux/rlsa-2025-8135.md) | Oct 3, 2025 | | Linux | python-tornado rocky 9 | 0:6.4.2-2.el9_6.2 | [RLSA-2025:8136](https://patchblox.com/security/data/fix/linux/rlsa-2025-8136.md) | Oct 4, 2025 | | Linux | python-tornado sles 15.6 | 4.5.3-150000.3.10.1 | [SUSE-SU-2025:01726-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-01726-1.md) | May 28, 2025 | | Linux | python-tornado sles 15.7 | 4.5.3-150000.3.10.1 | [SUSE-SU-2025:01726-2](https://patchblox.com/security/data/fix/linux/suse-su-2025-01726-2.md) | Jun 6, 2025 | | Linux | python-tornado-debugsource amzn 2023 | 6.1.0-2.amzn2023.0.5 | [ALAS2023-2025-1002](https://patchblox.com/security/data/fix/linux/alas2023-2025-1002.md) | Jun 4, 2025 | | Linux | python-tornado-doc amzn 2023 | 6.1.0-2.amzn2023.0.5 | [ALAS2023-2025-1002](https://patchblox.com/security/data/fix/linux/alas2023-2025-1002.md) | Jun 4, 2025 | | Linux | python-tornado6 opensuse-leap 15.6 | 6.3.2-150400.9.9.1 | [SUSE-SU-2025:01649-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-01649-1.md) | May 22, 2025 | | Linux | python-tornado6 sles 15.6 | 6.3.2-150400.9.9.1 | [SUSE-SU-2025:01649-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-01649-1.md) | May 22, 2025 | | Linux | python-tornado6 sles 15.7 | 6.3.2-150400.9.9.1 | [SUSE-SU-2025:01649-2](https://patchblox.com/security/data/fix/linux/suse-su-2025-01649-2.md) | May 23, 2025 | | Linux | python3-tornado RHEL 9 | 0:6.4.2-2.el9_6.2 | [RHSA-2025:8136](https://patchblox.com/security/data/fix/linux/rhsa-2025-8136.md) | May 26, 2025 | | Linux | python3-tornado Ubuntu 22.04.1 LTS (jammy) | 6.1.0-3ubuntu0.1~esm2 | [python3-tornado 6.1.0-3ubuntu0.1~esm2](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-python3-tornado-6.1.0-3ubuntu0.1-esm2.md) | May 15, 2025 | | Linux | python3-tornado Ubuntu 24.04.5 LTS (noble) | 6.4.0-1ubuntu0.2 | [python3-tornado 6.4.0-1ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-noble-python3-tornado-6.4.0-1ubuntu0.2.md) | May 15, 2025 | | Linux | python3-tornado Ubuntu 24.10 (oracular) | 6.4.1-2ubuntu0.2 | [python3-tornado 6.4.1-2ubuntu0.2](https://patchblox.com/security/data/fix/linux/ubuntu-oracular-python3-tornado-6.4.1-2ubuntu0.2.md) | Jan 16, 2026 | | Linux | python3-tornado Ubuntu 25.04 (plucky) | 6.4.2-1ubuntu0.25.04.1 | [python3-tornado 6.4.2-1ubuntu0.25.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-plucky-python3-tornado-6.4.2-1ubuntu0.25.04.1.md) | Jan 16, 2026 | | Linux | python3-tornado Ubuntu 25.10 (questing) | 6.4.2-2 | [python3-tornado 6.4.2-2](https://patchblox.com/security/data/fix/linux/ubuntu-questing-python3-tornado-6.4.2-2.md) | May 15, 2025 | | Linux | python3-tornado almalinux 10 | 6.4.2-1.el10_0.1 | [ALSA-2025:8135](https://patchblox.com/security/data/fix/linux/alsa-2025-8135.md) | May 26, 2025 | | Linux | python3-tornado almalinux 9 | 6.4.2-2.el9_6.2 | [ALSA-2025:8136](https://patchblox.com/security/data/fix/linux/alsa-2025-8136.md) | May 26, 2025 | | Linux | python3-tornado amzn 2023 | 6.1.0-2.amzn2023.0.5 | [ALAS2023-2025-1002](https://patchblox.com/security/data/fix/linux/alas2023-2025-1002.md) | Jun 4, 2025 | | Linux | python3-tornado ol 10 | 0:6.4.2-1.el10_0.1 | [ELSA-2025-8135](https://patchblox.com/security/data/fix/linux/elsa-2025-8135.md) | Jun 26, 2025 | | Linux | python3-tornado ol 9 | 0:6.4.2-2.el9_6.2 | [ELSA-2025-8136](https://patchblox.com/security/data/fix/linux/elsa-2025-8136.md) | May 26, 2025 | | Linux | python3-tornado-debuginfo amzn 2023 | 6.1.0-2.amzn2023.0.5 | [ALAS2023-2025-1002](https://patchblox.com/security/data/fix/linux/alas2023-2025-1002.md) | Jun 4, 2025 | | Linux | salt opensuse-leap 15.6 | 3006.0-150500.4.55.1 | [SUSE-SU-2025:02501-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02501-1.md) | Jul 23, 2025 | | Linux | salt sles 15.6 | 3006.0-150500.4.55.1 | [SUSE-SU-2025:02501-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02501-1.md) | Jul 23, 2025 | | Linux | salt sles 15.7 | 3006.0-150700.14.5.2 | [SUSE-SU-2025:02502-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02502-1.md) | Jul 23, 2025 | | Linux | salt-test opensuse-leap 15.6 | 3006.0-150500.4.55.1 | [SUSE-SU-2025:02501-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-02501-1.md) | Jul 23, 2025 | --- Data as of 2026-11-08T19:12:23Z UTC. 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