{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-56612 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-56612 is a medium-severity vulnerability in Linux kernel, published on 27 Dec 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-2024-56612 and fix it if it is affected.\n\nWhat it is: CVE-2024-56612 is a medium-severity vulnerability in Linux kernel, published on 27 Dec 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-2024-56612 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-2024-56612/ (Markdown: https://insights.sbomify.com/CVE-2024-56612/index.md)","id":"CVE-2024-56612","markdown":"https://insights.sbomify.com/CVE-2024-56612/index.md","name":"CVE-2024-56612","record":{"aliases":["BELL-CVE-2024-56612","DEBIAN-CVE-2024-56612","GHSA-vww8-w2qw-qhfg","UBUNTU-CVE-2024-56612"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A local attacker can trigger a kernel crash via NULL pointer dereference in unpin_user_pages() when using specific memory configurations.","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":"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\nmm/gup: handle NULL pages in unpin_user_pages()\n\nThe recent addition of \"pofs\" (pages or folios) handling to gup has a\nflaw: it assumes that unpin_user_pages() handles NULL pages in the pages**\narray.  That's not the case, as I discovered when I ran on a new\nconfiguration on my test machine.\n\nFix this by skipping NULL pages in unpin_user_pages(), just like\nunpin_folios() already does.\n\nDetails: when booting on x86 with \"numa=fake=2 movablecore=4G\" on Linux\n6.12, and running this:\n\n    tools/testing/selftests/mm/gup_longterm\n\n...I get the following crash:\n\nBUG: kernel NULL pointer dereference, address: 0000000000000008\nRIP: 0010:sanity_check_pinned_pages+0x3a/0x2d0\n...\nCall Trace:\n \u003cTASK\u003e\n ? __die_body+0x66/0xb0\n ? page_fault_oops+0x30c/0x3b0\n ? do_user_addr_fault+0x6c3/0x720\n ? irqentry_enter+0x34/0x60\n ? exc_page_fault+0x68/0x100\n ? asm_exc_page_fault+0x22/0x30\n ? sanity_check_pinned_pages+0x3a/0x2d0\n unpin_user_pages+0x24/0xe0\n check_and_migrate_movable_pages_or_folios+0x455/0x4b0\n __gup_longterm_locked+0x3bf/0x820\n ? mmap_read_lock_killable+0x12/0x50\n ? __pfx_mmap_read_lock_killable+0x10/0x10\n pin_user_pages+0x66/0xa0\n gup_test_ioctl+0x358/0xb20\n __se_sys_ioctl+0x6b/0xc0\n do_syscall_64+0x7b/0x150\n entry_SYSCALL_64_after_hwframe+0x76/0x7e","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/gup: handle NULL pages in unpin_user_pages()","id":"CVE-2024-56612","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"null_dereference","year":"2024"},"n_packages":0,"n_references":2,"next":{"headline":"sched/numa: fix memory leak due to the overwritten vma-\u003enumab_state","id":"CVE-2024-56613"},"packages":[],"prev":{"headline":"mm/mempolicy: fix migrate_to_node() assuming there is at least one VMA in a MM","id":"CVE-2024-56611"},"products":["Linux"],"published":"2024-12-27","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":"A local attacker can trigger a kernel crash via NULL pointer dereference in unpin_user_pages() when using specific memory configurations.","url":"https://insights.sbomify.com/CVE-2024-56612/"}