{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-47090 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-47090 is a medium-severity vulnerability in Linux kernel, published on 4 Mar 2024. 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-2021-47090 and fix it if it is affected.\n\nWhat it is: CVE-2021-47090 is a medium-severity vulnerability in Linux kernel, published on 4 Mar 2024. 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-2021-47090 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-2021-47090/ (Markdown: https://insights.sbomify.com/CVE-2021-47090/index.md)","id":"CVE-2021-47090","markdown":"https://insights.sbomify.com/CVE-2021-47090/index.md","name":"CVE-2021-47090","record":{"aliases":["DEBIAN-CVE-2021-47090","GHSA-2xp4-9hmm-63gj","UBUNTU-CVE-2021-47090"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["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 trigger a kernel panic via madvise, causing a denial of service in the Linux kernel.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()\n\nHulk Robot reported a panic in put_page_testzero() when testing\nmadvise() with MADV_SOFT_OFFLINE.  The BUG() is triggered when retrying\nget_any_page().  This is because we keep MF_COUNT_INCREASED flag in\nsecond try but the refcnt is not increased.\n\n    page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0)\n    ------------[ cut here ]------------\n    kernel BUG at include/linux/mm.h:737!\n    invalid opcode: 0000 [#1] PREEMPT SMP\n    CPU: 5 PID: 2135 Comm: sshd Tainted: G    B             5.16.0-rc6-dirty #373\n    Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014\n    RIP: release_pages+0x53f/0x840\n    Call Trace:\n      free_pages_and_swap_cache+0x64/0x80\n      tlb_flush_mmu+0x6f/0x220\n      unmap_page_range+0xe6c/0x12c0\n      unmap_single_vma+0x90/0x170\n      unmap_vmas+0xc4/0x180\n      exit_mmap+0xde/0x3a0\n      mmput+0xa3/0x250\n      do_exit+0x564/0x1470\n      do_group_exit+0x3b/0x100\n      __do_sys_exit_group+0x13/0x20\n      __x64_sys_exit_group+0x16/0x20\n      do_syscall_64+0x34/0x80\n      entry_SYSCALL_64_after_hwframe+0x44/0xae\n    Modules linked in:\n    ---[ end trace e99579b570fe0649 ]---\n    RIP: 0010:release_pages+0x53f/0x840","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":"mm/hwpoison: clear MF_COUNT_INCREASED before retrying get_any_page()","id":"CVE-2021-47090","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2021"},"n_packages":0,"n_references":3,"next":{"headline":"mac80211: fix locking in ieee80211_start_ap error path","id":"CVE-2021-47091"},"packages":[],"prev":{"headline":"kfence: fix memory leak when cat kfence objects","id":"CVE-2021-47089"},"products":["Linux"],"published":"2024-03-04","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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-11","vendors":["Linux"]},"summary":"A local attacker can trigger a kernel panic via madvise, causing a denial of service in the Linux kernel.","url":"https://insights.sbomify.com/CVE-2021-47090/"}