{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47257 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2021-47257 is a medium-severity vulnerability in Linux kernel, published on 21 May 2024."},"fix_prompt":"Check this codebase for CVE-2021-47257 and fix it if it is affected.\n\nWhat it is: CVE-2021-47257 is a medium-severity vulnerability in Linux kernel, published on 21 May 2024. \nExploitation: There is no known exploitation of CVE-2021-47257 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-2021-47257/ (Markdown: https://insights.sbomify.com/CVE-2021-47257/index.md)","id":"CVE-2021-47257","markdown":"https://insights.sbomify.com/CVE-2021-47257/index.md","name":"CVE-2021-47257","record":{"aliases":["DEBIAN-CVE-2021-47257","GHSA-33w7-r9c3-9qwq","UBUNTU-CVE-2021-47257"],"analysis":null,"analysis_generated_by":null,"assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"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-476","name":"NULL Pointer Dereference"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ieee802154: fix null deref in parse dev addr\n\nFix a logic error that could result in a null deref if the user sets\nthe mode incorrectly for the given addr type.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"net: ieee802154: fix null deref in parse dev addr","id":"CVE-2021-47257","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":null,"year":"2021"},"n_packages":0,"n_references":7,"next":{"headline":"scsi: core: Fix error handling of scsi_host_alloc()","id":"CVE-2021-47258"},"packages":[],"prev":{"headline":"mm/memory-failure: make sure wait for page writeback in memory_failure","id":"CVE-2021-47256"},"products":["Linux"],"published":"2024-05-21","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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2021-47257/"}