{"answers":{"affected":"It affects 11 products.","exploited":"Yes. Attackers have exploited CVE-2021-22600 in the wild since at least 11 Apr 2022.","fix":"Upgrade to a fixed version. US federal agencies must fix it by 2 May 2022.","what":"CVE-2021-22600 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 26 Jan 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-22600 and fix it if it is affected.\n\nWhat it is: CVE-2021-22600 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 26 Jan 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: Yes. Attackers have exploited CVE-2021-22600 in the wild since at least 11 Apr 2022.\n\nAffected product: Debian Debian 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-2021-22600/ (Markdown: https://insights.sbomify.com/CVE-2021-22600/index.md)","id":"CVE-2021-22600","markdown":"https://insights.sbomify.com/CVE-2021-22600/index.md","name":"CVE-2021-22600","record":{"aliases":["A-213464034","ASB-A-213464034","AZL-8450","DEBIAN-CVE-2021-22600","GHSA-6rrc-7vqp-364c","PUB-A-213464034","UBUNTU-CVE-2021-22600"],"analysis":{"component_type":"kernel","fix_type":"upgrade","impacts":["privilege_escalation","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux Kernel","requires_auth":"low_privilege","summary":"A local attacker can exploit a double free bug in the Linux kernel packet socket implementation to escalate privileges or cause a denial of service.","user_interaction":"required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Google","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"linux_kernel","vendor":"linux"},{"product":"8300_firmware","vendor":"netapp"},{"product":"8700_firmware","vendor":"netapp"},{"product":"a400_firmware","vendor":"netapp"},{"product":"c400_firmware","vendor":"netapp"},{"product":"h300s_firmware","vendor":"netapp"},{"product":"h410c_firmware","vendor":"netapp"},{"product":"h410s_firmware","vendor":"netapp"},{"product":"h500s_firmware","vendor":"netapp"},{"product":"h700s_firmware","vendor":"netapp"}],"cvss":{"score":6.6,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:H","version":"3.1"},"cwes":[{"id":"CWE-415","name":"Double Free"}],"description":"A double free bug in packet_set_ring() in net/packet/af_packet.c can be exploited by a local user through crafted syscalls to escalate privileges or deny service. We recommend upgrading kernel past the effected versions or rebuilding past ec6af094ea28f0f2dda1a6a33b14cd57e36a9755","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2025-06-22","github_poc":2,"max_poc_stars":1,"metasploit":0,"nuclei":0,"refs":[{"date":"2025-06-22T19:28:13Z","kind":"github_poc","ref":"https://github.com/sendINUX/CVE-2021-22600__DirtyPagetable","stars":1,"title":null},{"date":"2025-09-17T06:31:09Z","kind":"github_poc","ref":"https://github.com/Chinmay1743/af_packet.c","stars":1,"title":"Proof-Of-Concept to check privileges of af_packet.c for validating the privileges acquired by any hacker upon successful exploitation of CVE-2021-22600"}],"tier":"exploited"},"has_fix":true,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2021-22600","indexable":true,"kev":{"dateAdded":"2022-04-11","dueDate":"2022-05-02","knownRansomwareCampaignUse":"Unknown","product":"Kernel","requiredAction":"Apply updates per vendor instructions.","vendorProject":"Linux","vulnerabilityName":"Linux Kernel Privilege Escalation Vulnerability"},"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel","netapp:h300s_firmware","netapp:h410c_firmware","netapp:h410s_firmware","netapp:h500s_firmware","netapp:h700s_firmware"],"type":"use_after_free","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"Texas Instruments TI-RTOS Integer Overflow or Wraparound","id":"CVE-2021-22636"},"packages":[],"prev":{"headline":"Incorrect signature verification on Google-oauth-java-client","id":"CVE-2021-22573"},"products":["Kernel"],"published":"2022-01-26","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"partial"},"state":"PUBLISHED","updated":"2025-10-21","vendors":["Linux Kernel"]},"summary":"A local attacker can exploit a double free bug in the Linux kernel packet socket implementation to escalate privileges or cause a denial of service.","url":"https://insights.sbomify.com/CVE-2021-22600/"}