{"id":"UBUNTU-CVE-2025-69229","details":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks. If an application makes use of the request.read() method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time. This issue is fixed in version 3.13.3.","modified":"2026-02-17T21:29:03.521927Z","published":"2026-01-06T00:15:00Z","related":["USN-8032-1"],"upstream":["CVE-2025-69229"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-69229"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-69229"},{"type":"REPORT","url":"https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712"},{"type":"REPORT","url":"https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229"},{"type":"REPORT","url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g84x-mcqj-x9qq"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8032-1"}],"affected":[{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp@0.20.2-1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.17.2-1","0.17.4-1","0.17.4-1build1","0.20.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-aiohttp","binary_version":"0.20.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-69229.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp@3.0.1-1ubuntu0.1~esm6?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.1-1ubuntu0.1~esm6"}]}],"versions":["2.2.3-1build1","2.2.3-2","2.3.6-1","3.0.1-1","3.0.1-1ubuntu0.1~esm1","3.0.1-1ubuntu0.1~esm4","3.0.1-1ubuntu0.1~esm5"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-aiohttp","binary_version":"3.0.1-1ubuntu0.1~esm6"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-69229.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp@3.8.1-4ubuntu0.2+esm2?arch=source&distro=esm-apps/jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.8.1-4ubuntu0.2+esm2"}]}],"versions":["3.7.4-1","3.7.4-1build2","3.8.1-3","3.8.1-4","3.8.1-4build1","3.8.1-4ubuntu0.2","3.8.1-4ubuntu0.2+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-aiohttp","binary_version":"3.8.1-4ubuntu0.2+esm2"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-69229.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp@3.9.1-1ubuntu0.1+esm2?arch=source&distro=esm-apps/noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.9.1-1ubuntu0.1+esm2"}]}],"versions":["3.8.4-1","3.9.1-1","3.9.1-1build1","3.9.1-1ubuntu0.1","3.9.1-1ubuntu0.1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-aiohttp","binary_version":"3.9.1-1ubuntu0.1+esm2"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-69229.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/python-aiohttp@3.11.16-1ubuntu0.1?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11.16-1ubuntu0.1"}]}],"versions":["3.10.11-1build1","3.11.16-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-aiohttp","binary_version":"3.11.16-1ubuntu0.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-69229.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}