{"answers":{"affected":"It affects 9 products.","exploited":"There is no known exploitation of CVE-2021-26708 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-26708 is a high-severity vulnerability in Linux kernel, published on 5 Feb 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-2021-26708 and fix it if it is affected.\n\nWhat it is: CVE-2021-26708 is a high-severity vulnerability in Linux kernel, published on 5 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-26708 in the wild and no public exploit code.\n\nAffected product: Linux kernel. 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-2021-26708/ (Markdown: https://insights.sbomify.com/CVE-2021-26708/index.md)","id":"CVE-2021-26708","markdown":"https://insights.sbomify.com/CVE-2021-26708/index.md","name":"CVE-2021-26708","record":{"aliases":["DEBIAN-CVE-2021-26708","GHSA-hhxw-8c9w-q5q9","MGASA-2021-0084","UBUNTU-CVE-2021-26708","USN-4727-1"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A local attacker can exploit race conditions in the Linux kernel's AF_VSOCK implementation to escalate privileges.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"linux_kernel","vendor":"linux"},{"product":"aff_baseboard_management_controller","vendor":"netapp"},{"product":"baseboard_management_controller_500f_firmware","vendor":"netapp"},{"product":"baseboard_management_controller_a250_firmware","vendor":"netapp"},{"product":"cloud_backup","vendor":"netapp"},{"product":"fas_baseboard_management_controller","vendor":"netapp"},{"product":"hci_h410c_firmware","vendor":"netapp"},{"product":"solidfire_\\\u0026_hci_management_node","vendor":"netapp"},{"product":"solidfire_baseboard_management_controller","vendor":"netapp"}],"cvss":{"score":7,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-667","name":"Improper Locking"}],"description":"A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2021-02-15","github_poc":3,"max_poc_stars":28,"metasploit":0,"nuclei":0,"refs":[{"date":"2021-02-15T20:27:06Z","kind":"github_poc","ref":"https://github.com/jordan9001/vsock_poc","stars":28,"title":"Investigating the bug behind CVE-2021-26708"},{"date":"2026-08-07T06:08:20Z","kind":"github_poc","ref":"https://github.com/kungaocode/vulnerability-analysis-","stars":1,"title":"Automated reproduction and analysis of CVE-2021-26708 — a use-after-free vulnerability in the Linux kernel's AF_VSOCK subsystem (v5.10.12). Includes PoC exploit code, KASAN runtime detection report, and the full kernel build configuration for environment replication. Built with KernJC."},{"date":"2021-03-15T08:52:54Z","kind":"github_poc","ref":"https://github.com/azpema/CVE-2021-26708","stars":0,"title":null}],"tier":"poc_unverified"},"has_fix":true,"headline":"Race condition in n/a","id":"CVE-2021-26708","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel","netapp:cloud_backup","netapp:solidfire_\\\u0026_hci_management_node"],"type":"race_condition","year":"2021"},"n_packages":0,"n_references":7,"next":{"headline":"Memory corruption in n/a","id":"CVE-2021-26709"},"packages":[],"prev":{"headline":"Prototype pollution in Merge-deep","id":"CVE-2021-26707"},"products":["n/a"],"published":"2021-02-05","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"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":"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"A local attacker can exploit race conditions in the Linux kernel's AF_VSOCK implementation to escalate privileges.","url":"https://insights.sbomify.com/CVE-2021-26708/"}