{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-56664 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-56664 is a high-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-2024-56664 and fix it if it is affected.\n\nWhat it is: CVE-2024-56664 is a high-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-2024-56664 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-2024-56664/ (Markdown: https://insights.sbomify.com/CVE-2024-56664/index.md)","id":"CVE-2024-56664","markdown":"https://insights.sbomify.com/CVE-2024-56664/index.md","name":"CVE-2024-56664","record":{"aliases":["AZL-54779","AZL-54812","BELL-CVE-2024-56664","DEBIAN-CVE-2024-56664","GHSA-22x4-j6vj-fmm5","UBUNTU-CVE-2024-56664"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A race condition in the Linux kernel's BPF sockmap allows attackers to trigger use-after-free errors, potentially leading to privilege escalation or code execution.","user_interaction":"not_required","vuln_class":"race_condition"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"},{"id":"CWE-362","name":"Concurrent Execution using Shared Resource with Improper Synchronization"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Fix race between element replace and close()\n\nElement replace (with a socket different from the one stored) may race\nwith socket's close() link popping \u0026 unlinking. __sock_map_delete()\nunconditionally unrefs the (wrong) element:\n\n// set map[0] = s0\nmap_update_elem(map, 0, s0)\n\n// drop fd of s0\nclose(s0)\n  sock_map_close()\n    lock_sock(sk)               (s0!)\n    sock_map_remove_links(sk)\n      link = sk_psock_link_pop()\n      sock_map_unlink(sk, link)\n        sock_map_delete_from_link\n                                        // replace map[0] with s1\n                                        map_update_elem(map, 0, s1)\n                                          sock_map_update_elem\n                                (s1!)       lock_sock(sk)\n                                            sock_map_update_common\n                                              psock = sk_psock(sk)\n                                              spin_lock(\u0026stab-\u003elock)\n                                              osk = stab-\u003esks[idx]\n                                              sock_map_add_link(..., \u0026stab-\u003esks[idx])\n                                              sock_map_unref(osk, \u0026stab-\u003esks[idx])\n                                                psock = sk_psock(osk)\n                                                sk_psock_put(sk, psock)\n                                                  if (refcount_dec_and_test(\u0026psock))\n                                                    sk_psock_drop(sk, psock)\n                                              spin_unlock(\u0026stab-\u003elock)\n                                            unlock_sock(sk)\n          __sock_map_delete\n            spin_lock(\u0026stab-\u003elock)\n            sk = *psk                        // s1 replaced s0; sk == s1\n            if (!sk_test || sk_test == sk)   // sk_test (s0) != sk (s1); no branch\n              sk = xchg(psk, NULL)\n            if (sk)\n              sock_map_unref(sk, psk)        // unref s1; sks[idx] will dangle\n                psock = sk_psock(sk)\n                sk_psock_put(sk, psock)\n                  if (refcount_dec_and_test())\n                    sk_psock_drop(sk, psock)\n            spin_unlock(\u0026stab-\u003elock)\n    release_sock(sk)\n\nThen close(map) enqueues bpf_map_free_deferred, which finally calls\nsock_map_free(). This results in some refcount_t warnings along with\na KASAN splat [1].\n\nFix __sock_map_delete(), do not allow sock_map_unref() on elements that\nmay have been replaced.\n\n[1]:\nBUG: KASAN: slab-use-after-free in sock_map_free+0x10e/0x330\nWrite of size 4 at addr ffff88811f5b9100 by task kworker/u64:12/1063\n\nCPU: 14 UID: 0 PID: 1063 Comm: kworker/u64:12 Not tainted 6.12.0+ #125\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014\nWorkqueue: events_unbound bpf_map_free_deferred\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x68/0x90\n print_report+0x174/0x4f6\n kasan_report+0xb9/0x190\n kasan_check_range+0x10f/0x1e0\n sock_map_free+0x10e/0x330\n bpf_map_free_deferred+0x173/0x320\n process_one_work+0x846/0x1420\n worker_thread+0x5b3/0xf80\n kthread+0x29e/0x360\n ret_from_fork+0x2d/0x70\n ret_from_fork_asm+0x1a/0x30\n \u003c/TASK\u003e\n\nAllocated by task 1202:\n kasan_save_stack+0x1e/0x40\n kasan_save_track+0x10/0x30\n __kasan_slab_alloc+0x85/0x90\n kmem_cache_alloc_noprof+0x131/0x450\n sk_prot_alloc+0x5b/0x220\n sk_alloc+0x2c/0x870\n unix_create1+0x88/0x8a0\n unix_create+0xc5/0x180\n __sock_create+0x241/0x650\n __sys_socketpair+0x1ce/0x420\n __x64_sys_socketpair+0x92/0x100\n do_syscall_64+0x93/0x180\n entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nFreed by task 46:\n kasan_save_stack+0x1e/0x40\n kasan_save_track+0x10/0x30\n kasan_save_free_info+0x37/0x60\n __kasan_slab_free+0x4b/0x70\n kmem_cache_free+0x1a1/0x590\n __sk_destruct+0x388/0x5a0\n sk_psock_destroy+0x73e/0xa50\n process_one_work+0x846/0x1420\n worker_thread+0x5b3/0xf80\n kthread+0x29e/0x360\n ret_from_fork+0x2d/0x70\n ret_from_fork_asm+0x1a/0x30\n\nThe bu\n---truncated---","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":"bpf, sockmap: Fix race between element replace and close()","id":"CVE-2024-56664","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"race_condition","year":"2024"},"n_packages":0,"n_references":6,"next":{"headline":"bpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog","id":"CVE-2024-56665"},"packages":[],"prev":{"headline":"wifi: nl80211: fix NL80211_ATTR_MLO_LINK_ID off-by-one","id":"CVE-2024-56663"},"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":"total"},"state":"PUBLISHED","updated":"2026-10-15","vendors":["Linux"]},"summary":"A race condition in the Linux kernel's BPF sockmap allows attackers to trigger use-after-free errors, potentially leading to privilege escalation or code execution.","url":"https://insights.sbomify.com/CVE-2024-56664/"}