{"answers":{"affected":"It affects 21 products.","exploited":"Yes. Attackers have exploited CVE-2021-22555 in the wild since at least 6 Oct 2025.","fix":"Apply the vendor's patch. US federal agencies must fix it by 27 Oct 2025.","what":"CVE-2021-22555 is a high-severity memory corruption vulnerability in Broadcom Fabric Operating System, published on 7 Jul 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-22555 and fix it if it is affected.\n\nWhat it is: CVE-2021-22555 is a high-severity memory corruption vulnerability in Broadcom Fabric Operating System, published on 7 Jul 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: Yes. Attackers have exploited CVE-2021-22555 in the wild since at least 6 Oct 2025.\n\nAffected product: Broadcom Fabric Operating System. 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-2021-22555/ (Markdown: https://insights.sbomify.com/CVE-2021-22555/index.md)","id":"CVE-2021-22555","markdown":"https://insights.sbomify.com/CVE-2021-22555/index.md","name":"CVE-2021-22555","record":{"aliases":["A-184847809","CLSA-2021-1632261894","CLSA-2021-1632261912","DEBIAN-CVE-2021-22555","LSN-0080-1","PUB-A-184847809","RHSA-2025:17733","UBUNTU-CVE-2021-22555","USN-5039-1"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux Kernel","requires_auth":"none","summary":"A heap out-of-bounds write in the Linux kernel netfilter allows attackers to gain privileges or cause denial of service via user namespaces.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Google","cpe":[{"product":"fabric_operating_system","vendor":"broadcom"},{"product":"linux_kernel","vendor":"linux"},{"product":"aff_500f_firmware","vendor":"netapp"},{"product":"aff_a250_firmware","vendor":"netapp"},{"product":"aff_a400_firmware","vendor":"netapp"},{"product":"c250_firmware","vendor":"netapp"},{"product":"c400_firmware","vendor":"netapp"},{"product":"cloud_backup","vendor":"netapp"},{"product":"fas_8300_firmware","vendor":"netapp"},{"product":"fas_8700_firmware","vendor":"netapp"},{"product":"h300s_firmware","vendor":"netapp"},{"product":"h410c_firmware","vendor":"netapp"},{"product":"h410s_firmware","vendor":"netapp"},{"product":"h500s_firmware","vendor":"netapp"},{"product":"h610c_firmware","vendor":"netapp"},{"product":"h610s_firmware","vendor":"netapp"},{"product":"h615c_firmware","vendor":"netapp"},{"product":"h700s_firmware","vendor":"netapp"},{"product":"hci_management_node","vendor":"netapp"},{"product":"solidfire","vendor":"netapp"},{"product":"solidfire_baseboard_management_controller","vendor":"netapp"}],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"A heap out-of-bounds write affecting Linux since v2.6.19-rc1 was discovered in net/netfilter/x_tables.c. This allows an attacker to gain privileges or cause a DoS (via heap memory corruption) through user name space","ecosystems":["Red Hat:rhel_els:6"],"exploits":{"exploitdb":1,"first_seen":"2021-07-07","github_poc":13,"max_poc_stars":40,"metasploit":1,"nuclei":0,"refs":[{"date":"2022-04-05T06:35:25Z","kind":"github_poc","ref":"https://github.com/veritas501/CVE-2021-22555-PipeVersion","stars":40,"title":"CVE-2021-22555 exploit rewritten with pipe primitive"},{"date":"2021-07-16T01:54:01Z","kind":"github_poc","ref":"https://github.com/xyjl-ly/CVE-2021-22555-Exploit","stars":14,"title":"CVE-2021-22555 Exploit"},{"date":"2021-07-16T19:12:57Z","kind":"github_poc","ref":"https://github.com/cgwalters/container-cve-2021-22555","stars":4,"title":null},{"date":"2023-08-05T18:56:18Z","kind":"github_poc","ref":"https://github.com/tukru/CVE-2021-22555","stars":3,"title":"This repo hosts TUKRU's Linux Privilege Escalation exploit (CVE-2021-22555). It demonstrates gaining root privileges via a vulnerability. Tested on Ubuntu 5.8.0-48-generic and COS 5.4.89+. Use responsibly and ethically."},{"date":"2021-07-15T10:17:42Z","kind":"github_poc","ref":"https://github.com/JoneyJunior/cve-2021-22555","stars":1,"title":null},{"date":"2021-10-01T02:18:45Z","kind":"github_poc","ref":"https://github.com/daletoniris/CVE-2021-22555-esc-priv","stars":1,"title":null},{"date":"2023-05-10T15:30:32Z","kind":"github_poc","ref":"https://github.com/masjohncook/netsec-project","stars":1,"title":"Script of Network Security Project - Attack on CVE-2021-22555"},{"date":"2026-02-02T11:29:31Z","kind":"github_poc","ref":"https://github.com/Spydomain/CVE-2021-22555-Poc","stars":1,"title":null}],"tier":"exploited"},"has_fix":true,"headline":"Linux Kernel Heap Out-of-Bounds Write","id":"CVE-2021-22555","indexable":true,"kev":{"dateAdded":"2025-10-06","dueDate":"2025-10-27","knownRansomwareCampaignUse":"Unknown","product":"Kernel","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","vendorProject":"Linux","vulnerabilityName":"Linux Kernel Heap Out-of-Bounds Write Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"broadcom:fabric_operating_system","products":["broadcom:fabric_operating_system","linux:linux_kernel","netapp:cloud_backup","netapp:h300s_firmware","netapp:h410c_firmware","netapp:h410s_firmware","netapp:h500s_firmware","netapp:h610s_firmware","netapp:h700s_firmware","netapp:hci_management_node","netapp:solidfire"],"type":"memory_corruption","year":"2021"},"n_packages":19,"n_references":9,"next":{"headline":"Integer Overflow in Fuchsia Kernel","id":"CVE-2021-22556"},"packages":[{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel","purl":"pkg:rpm/redhat/kernel","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-abi-whitelists","purl":"pkg:rpm/redhat/kernel-abi-whitelists","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-debug","purl":"pkg:rpm/redhat/kernel-debug","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-debuginfo","purl":"pkg:rpm/redhat/kernel-debug-debuginfo","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel","purl":"pkg:rpm/redhat/kernel-debug-devel","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo","purl":"pkg:rpm/redhat/kernel-debuginfo","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-i686","purl":"pkg:rpm/redhat/kernel-debuginfo-common-i686","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-s390x","purl":"pkg:rpm/redhat/kernel-debuginfo-common-s390x","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-x86_64","purl":"pkg:rpm/redhat/kernel-debuginfo-common-x86_64","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-devel","purl":"pkg:rpm/redhat/kernel-devel","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-doc","purl":"pkg:rpm/redhat/kernel-doc","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-firmware","purl":"pkg:rpm/redhat/kernel-firmware","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-kdump","purl":"pkg:rpm/redhat/kernel-kdump","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-kdump-debuginfo","purl":"pkg:rpm/redhat/kernel-kdump-debuginfo","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"kernel-kdump-devel","purl":"pkg:rpm/redhat/kernel-kdump-devel","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"perf","purl":"pkg:rpm/redhat/perf","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"perf-debuginfo","purl":"pkg:rpm/redhat/perf-debuginfo","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"python-perf","purl":"pkg:rpm/redhat/python-perf","source":"RHSA-2025:17733"},{"ecosystem":"Red Hat:rhel_els:6","fixed":["0:2.6.32-754.58.1.el6"],"introduced":["0"],"last_affected":[],"package":"python-perf-debuginfo","purl":"pkg:rpm/redhat/python-perf-debuginfo","source":"RHSA-2025:17733"}],"prev":{"headline":"Heap Memory exhaustion in Gerrit","id":"CVE-2021-22553"},"products":["Linux Kernel"],"published":"2021-07-07","related":[{"cvss_score":8.6,"headline":"Broadcom Brocade Fabric OS Code Injection","id":"CVE-2025-1976","kev_date_added":"2025-04-28","published":"2025-04-24"},{"cvss_score":9.8,"headline":"Command injection in Brocade Fabric OS","id":"CVE-2022-33186","kev_date_added":null,"published":"2022-12-08"},{"cvss_score":9.8,"headline":"Hardcoded credentials in Brocade Fabric OS","id":"CVE-2021-27797","kev_date_added":null,"published":"2022-02-21"},{"cvss_score":9.8,"headline":"Code injection in Brocade Fabric OS","id":"CVE-2020-15371","kev_date_added":null,"published":"2020-09-25"},{"cvss_score":9.8,"headline":"Memory corruption in Brocade Fabric OS","id":"CVE-2020-15373","kev_date_added":null,"published":"2020-09-25"},{"cvss_score":9.8,"headline":"Cross-site scripting in Brocade Fabric OS","id":"CVE-2020-15374","kev_date_added":null,"published":"2020-09-25"}],"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":"RHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"open","licence":"CC0 1.0","name":"CISA KEV"},{"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":"active","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-12-30","vendors":["n/a"]},"summary":"A heap out-of-bounds write in the Linux kernel netfilter allows attackers to gain privileges or cause denial of service via user namespaces.","url":"https://insights.sbomify.com/CVE-2021-22555/"}