{"answers":{"affected":"It affects 24 products.","exploited":"There is no known exploitation of CVE-2021-26355 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-26355 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-26355 is a medium-severity denial of service vulnerability in Amd Epyc 72f3 Firmware, published on 10 Jan 2023. 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-2021-26355 and fix it if it is affected.\n\nWhat it is: CVE-2021-26355 is a medium-severity denial of service vulnerability in Amd Epyc 72f3 Firmware, published on 10 Jan 2023. 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-2021-26355 in the wild and no public exploit code.\n\nAffected product: Amd Epyc 72f3 Firmware. 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-2021-26355/ (Markdown: https://insights.sbomify.com/CVE-2021-26355/index.md)","id":"CVE-2021-26355","markdown":"https://insights.sbomify.com/CVE-2021-26355/index.md","name":"CVE-2021-26355","record":{"aliases":["GHSA-p4w7-qphw-gm3c"],"analysis":{"component_type":"hardware_firmware","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"AMD EPYC firmware","requires_auth":"low_privilege","summary":"Insufficient checks in AMD EPYC SMU allow access to invalid registers, potentially causing a denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"AMD","cpe":[{"product":"epyc_7003_firmware","vendor":"amd"},{"product":"epyc_72f3_firmware","vendor":"amd"},{"product":"epyc_7313_firmware","vendor":"amd"},{"product":"epyc_7313p_firmware","vendor":"amd"},{"product":"epyc_7343_firmware","vendor":"amd"},{"product":"epyc_7373x_firmware","vendor":"amd"},{"product":"epyc_73f3_firmware","vendor":"amd"},{"product":"epyc_7413_firmware","vendor":"amd"},{"product":"epyc_7443_firmware","vendor":"amd"},{"product":"epyc_7443p_firmware","vendor":"amd"},{"product":"epyc_7453_firmware","vendor":"amd"},{"product":"epyc_74f3_firmware","vendor":"amd"},{"product":"epyc_7513_firmware","vendor":"amd"},{"product":"epyc_7543_firmware","vendor":"amd"},{"product":"epyc_7543p_firmware","vendor":"amd"},{"product":"epyc_7573x_firmware","vendor":"amd"},{"product":"epyc_75f3_firmware","vendor":"amd"},{"product":"epyc_7643_firmware","vendor":"amd"},{"product":"epyc_7663_firmware","vendor":"amd"},{"product":"epyc_7713_firmware","vendor":"amd"},{"product":"epyc_7713p_firmware","vendor":"amd"},{"product":"epyc_7743_firmware","vendor":"amd"},{"product":"epyc_7763_firmware","vendor":"amd"},{"product":"epyc_7773x_firmware","vendor":"amd"}],"cvss":{"score":5.5,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-693","name":"Protection Mechanism Failure"}],"description":"Insufficient fencing and checks in System Management Unit (SMU) may result in access to invalid message port registers that could result in a potential denial-of-service.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Denial of service in 3rd Gen EPYC","id":"CVE-2021-26355","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"amd:epyc_72f3_firmware","products":["amd:epyc_72f3_firmware","amd:epyc_7313_firmware","amd:epyc_7313p_firmware","amd:epyc_7343_firmware","amd:epyc_7373x_firmware","amd:epyc_73f3_firmware","amd:epyc_7413_firmware","amd:epyc_7443_firmware","amd:epyc_7443p_firmware","amd:epyc_7453_firmware","amd:epyc_74f3_firmware","amd:epyc_7513_firmware","amd:epyc_7543_firmware","amd:epyc_7543p_firmware","amd:epyc_7573x_firmware","amd:epyc_75f3_firmware","amd:epyc_7643_firmware","amd:epyc_7663_firmware","amd:epyc_7713_firmware","amd:epyc_7713p_firmware","amd:epyc_7763_firmware","amd:epyc_7773x_firmware"],"type":"denial_of_service","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Race condition in 1st Gen AMD EPYC™ Processors","id":"CVE-2021-26356"},"packages":[],"prev":{"headline":"Memory corruption in 2nd Gen AMD EPYC™ Processors","id":"CVE-2021-26354"},"products":["3rd Gen EPYC"],"published":"2023-01-10","related":[{"cvss_score":7.8,"headline":"Code injection in 3rd Gen AMD EPYC™","id":"CVE-2021-26315","kev_date_added":null,"published":"2021-11-16"},{"cvss_score":7.5,"headline":"Denial of service in 3rd Gen EPYC","id":"CVE-2023-20530","kev_date_added":null,"published":"2023-01-10"},{"cvss_score":5.5,"headline":"Information disclosure in 3rd Gen EPYC","id":"CVE-2021-26343","kev_date_added":null,"published":"2023-01-10"},{"cvss_score":5.5,"headline":"Information disclosure in 3rd Gen EPYC","id":"CVE-2021-26404","kev_date_added":null,"published":"2023-01-10"},{"cvss_score":5.5,"headline":"Information disclosure in 3rd Gen AMD EPYC™","id":"CVE-2021-26327","kev_date_added":null,"published":"2021-11-16"},{"cvss_score":4.4,"headline":"Information disclosure in 3rd Gen AMD EPYC™ Processors","id":"CVE-2023-20594","kev_date_added":null,"published":"2023-09-20"}],"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-04-09","vendors":["AMD"]},"summary":"Insufficient checks in AMD EPYC SMU allow access to invalid registers, potentially causing a denial of service.","url":"https://insights.sbomify.com/CVE-2021-26355/"}