{"answers":{"affected":"It affects 3 products.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-26466 exists.","fix":"Apply the vendor's patch.","what":"CVE-2025-26466 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 28 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-26466 and fix it if it is affected.\n\nWhat it is: CVE-2025-26466 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 28 Feb 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-26466 exists.\n\nAffected product: Canonical Ubuntu Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-26466/ (Markdown: https://insights.sbomify.com/CVE-2025-26466/index.md)","id":"CVE-2025-26466","markdown":"https://insights.sbomify.com/CVE-2025-26466/index.md","name":"CVE-2025-26466","record":{"aliases":["ALPINE-CVE-2025-26466","AZL-56898","BELL-CVE-2025-26466","DEBIAN-CVE-2025-26466","GHSA-m92w-x6j2-5gc5","RHBA-2025:6305","UBUNTU-CVE-2025-26466"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"OpenSSH server","requires_auth":"none","summary":"A malicious client can cause OpenSSH server memory exhaustion by sending excessive ping packets, leading to denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"openssh","vendor":"openbsd"}],"cvss":{"score":5.9,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-770","name":"Allocation of Resources Without Limits or Throttling"}],"description":"A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.","ecosystems":["Red Hat:enterprise_linux:10.0"],"exploits":{"exploitdb":0,"first_seen":"2025-02-18","github_poc":5,"max_poc_stars":5,"metasploit":0,"nuclei":0,"refs":[{"date":"2025-02-18T16:59:09Z","kind":"github_poc","ref":"https://github.com/rxerium/CVE-2025-26466","stars":5,"title":" The OpenSSH client and server are vulnerable to a pre-authentication DoS attack between versions 9.5p1 to 9.9p1 (inclusive) that causes memory and CPU consumption"},{"date":"2025-06-23T13:00:11Z","kind":"github_poc","ref":"https://github.com/mrowkoob/CVE-2025-26466-msf","stars":1,"title":"CVE-2025-26466 - SSH Ping DoS Ruby module for Metasploit Framework"},{"date":"2026-04-02T13:32:18Z","kind":"github_poc","ref":"https://github.com/tpirate/CVE-2025-26466","stars":0,"title":"poc for CVE-2025-26466"},{"date":"2026-07-29T17:45:39Z","kind":"github_poc","ref":"https://github.com/acidboonrs/cve-2025-26466-openssh-poc","stars":0,"title":"CVE-2025-26466 OpenSSH SSH2_MSG_PING DoS PoC"},{"date":"2026-10-09T06:25:25Z","kind":"github_poc","ref":"https://github.com/K0n9-log/cve-2025-26466-canvas","stars":0,"title":null}],"tier":"weaponised"},"has_fix":true,"headline":"Openssh: denial-of-service in openssh","id":"CVE-2025-26466","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux","openbsd:openssh"],"type":"denial_of_service","year":"2025"},"n_packages":14,"n_references":6,"next":{"headline":"Apache Cassandra: User with MODIFY permission on ALL KEYSPACES can escalate privileges to superuser via unsafe actions (4.0.16 only)","id":"CVE-2025-26467"},"packages":[{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh","purl":"pkg:rpm/redhat/openssh","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-askpass","purl":"pkg:rpm/redhat/openssh-askpass","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-askpass-debuginfo","purl":"pkg:rpm/redhat/openssh-askpass-debuginfo","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-clients","purl":"pkg:rpm/redhat/openssh-clients","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-clients-debuginfo","purl":"pkg:rpm/redhat/openssh-clients-debuginfo","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-debuginfo","purl":"pkg:rpm/redhat/openssh-debuginfo","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-debugsource","purl":"pkg:rpm/redhat/openssh-debugsource","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-keycat","purl":"pkg:rpm/redhat/openssh-keycat","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-keycat-debuginfo","purl":"pkg:rpm/redhat/openssh-keycat-debuginfo","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-keysign","purl":"pkg:rpm/redhat/openssh-keysign","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-keysign-debuginfo","purl":"pkg:rpm/redhat/openssh-keysign-debuginfo","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-server","purl":"pkg:rpm/redhat/openssh-server","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-server-debuginfo","purl":"pkg:rpm/redhat/openssh-server-debuginfo","source":"RHBA-2025:6305"},{"ecosystem":"Red Hat:enterprise_linux:10.0","fixed":["0:9.9p1-7.el10_0"],"introduced":["0"],"last_affected":[],"package":"openssh-sk-dummy-debuginfo","purl":"pkg:rpm/redhat/openssh-sk-dummy-debuginfo","source":"RHBA-2025:6305"}],"prev":{"headline":"Openssh: machine-in-the-middle attack if verifyhostkeydns is enabled","id":"CVE-2025-26465"},"products":["Red Hat Enterprise Linux 10","Red Hat Enterprise Linux 6","Red Hat Enterprise Linux 7","Red Hat Enterprise Linux 8","Red Hat Enterprise Linux 9","Red Hat OpenShift Container Platform 4"],"published":"2025-02-28","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHBA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-21","vendors":["Red Hat"]},"summary":"A malicious client can cause OpenSSH server memory exhaustion by sending excessive ping packets, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2025-26466/"}