[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-CVE-2023-52446":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T08:53:30.047Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":20,"aliases":21,"duplicate_of":9,"upstream":22,"downstream":23,"duplicates":40,"related":41,"reserved_at":9,"published_at":48,"modified_at":49,"state":50,"summary":51,"references_raw":60,"kevs":75,"epss":76,"epss_history":79,"metrics":330,"affected":338},"CVE-2023-52446","In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix a race condition between btf_put() and map_free()\n\nWhen running `./test_progs -j` in my local vm with latest kernel,\nI once hit a kasan error like below:\n\n  [ 1887.184724] BUG: KASAN: slab-use-after-free in bpf_rb_root_free+0x1f8/0x2b0\n  [ 1887.185599] Read of size 4 at addr ffff888106806910 by task kworker/u12:2/2830\n  [ 1887.186498]\n  [ 1887.186712] CPU: 3 PID: 2830 Comm: kworker/u12:2 Tainted: G           OEL     6.7.0-rc3-00699-g90679706d486-dirty #494\n  [ 1887.188034] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\n  [ 1887.189618] Workqueue: events_unbound bpf_map_free_deferred\n  [ 1887.190341] Call Trace:\n  [ 1887.190666]  \u003CTASK>\n  [ 1887.190949]  dump_stack_lvl+0xac/0xe0\n  [ 1887.191423]  ? nf_tcp_handle_invalid+0x1b0/0x1b0\n  [ 1887.192019]  ? panic+0x3c0/0x3c0\n  [ 1887.192449]  print_report+0x14f/0x720\n  [ 1887.192930]  ? preempt_count_sub+0x1c/0xd0\n  [ 1887.193459]  ? __virt_addr_valid+0xac/0x120\n  [ 1887.194004]  ? bpf_rb_root_free+0x1f8/0x2b0\n  [ 1887.194572]  kasan_report+0xc3/0x100\n  [ 1887.195085]  ? bpf_rb_root_free+0x1f8/0x2b0\n  [ 1887.195668]  bpf_rb_root_free+0x1f8/0x2b0\n  [ 1887.196183]  ? __bpf_obj_drop_impl+0xb0/0xb0\n  [ 1887.196736]  ? preempt_count_sub+0x1c/0xd0\n  [ 1887.197270]  ? preempt_count_sub+0x1c/0xd0\n  [ 1887.197802]  ? _raw_spin_unlock+0x1f/0x40\n  [ 1887.198319]  bpf_obj_free_fields+0x1d4/0x260\n  [ 1887.198883]  array_map_free+0x1a3/0x260\n  [ 1887.199380]  bpf_map_free_deferred+0x7b/0xe0\n  [ 1887.199943]  process_scheduled_works+0x3a2/0x6c0\n  [ 1887.200549]  worker_thread+0x633/0x890\n  [ 1887.201047]  ? __kthread_parkme+0xd7/0xf0\n  [ 1887.201574]  ? kthread+0x102/0x1d0\n  [ 1887.202020]  kthread+0x1ab/0x1d0\n  [ 1887.202447]  ? pr_cont_work+0x270/0x270\n  [ 1887.202954]  ? kthread_blkcg+0x50/0x50\n  [ 1887.203444]  ret_from_fork+0x34/0x50\n  [ 1887.203914]  ? kthread_blkcg+0x50/0x50\n  [ 1887.204397]  ret_from_fork_asm+0x11/0x20\n  [ 1887.204913]  \u003C/TASK>\n  [ 1887.204913]  \u003C/TASK>\n  [ 1887.205209]\n  [ 1887.205416] Allocated by task 2197:\n  [ 1887.205881]  kasan_set_track+0x3f/0x60\n  [ 1887.206366]  __kasan_kmalloc+0x6e/0x80\n  [ 1887.206856]  __kmalloc+0xac/0x1a0\n  [ 1887.207293]  btf_parse_fields+0xa15/0x1480\n  [ 1887.207836]  btf_parse_struct_metas+0x566/0x670\n  [ 1887.208387]  btf_new_fd+0x294/0x4d0\n  [ 1887.208851]  __sys_bpf+0x4ba/0x600\n  [ 1887.209292]  __x64_sys_bpf+0x41/0x50\n  [ 1887.209762]  do_syscall_64+0x4c/0xf0\n  [ 1887.210222]  entry_SYSCALL_64_after_hwframe+0x63/0x6b\n  [ 1887.210868]\n  [ 1887.211074] Freed by task 36:\n  [ 1887.211460]  kasan_set_track+0x3f/0x60\n  [ 1887.211951]  kasan_save_free_info+0x28/0x40\n  [ 1887.212485]  ____kasan_slab_free+0x101/0x180\n  [ 1887.213027]  __kmem_cache_free+0xe4/0x210\n  [ 1887.213514]  btf_free+0x5b/0x130\n  [ 1887.213918]  rcu_core+0x638/0xcc0\n  [ 1887.214347]  __do_softirq+0x114/0x37e\n\nThe error happens at bpf_rb_root_free+0x1f8/0x2b0:\n\n  00000000000034c0 \u003Cbpf_rb_root_free>:\n  ; {\n    34c0: f3 0f 1e fa                   endbr64\n    34c4: e8 00 00 00 00                callq   0x34c9 \u003Cbpf_rb_root_free+0x9>\n    34c9: 55                            pushq   %rbp\n    34ca: 48 89 e5                      movq    %rsp, %rbp\n  ...\n  ;       if (rec && rec->refcount_off >= 0 &&\n    36aa: 4d 85 ed                      testq   %r13, %r13\n    36ad: 74 a9                         je      0x3658 \u003Cbpf_rb_root_free+0x198>\n    36af: 49 8d 7d 10                   leaq    0x10(%r13), %rdi\n    36b3: e8 00 00 00 00                callq   0x36b8 \u003Cbpf_rb_root_free+0x1f8>\n                                        \u003C==== kasan function\n    36b8: 45 8b 7d 10                   movl    0x10(%r13), %r15d\n                                        \u003C==== use-after-free load\n    36bc: 45 85 ff                      testl   %r15d, %r15d\n    36bf: 78 8c                         js      0x364d \u003Cbpf_rb_root_free+0x18d>\n\nSo the problem \n---truncated---",null,[11],{"_key":12,"id":12,"name":13,"description":14,"type":15,"status":16,"abstraction":17,"likelihood_of_exploit":18,"capec":19},"CWE-416","Use After Free","The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","weakness","Stable","Variant","High",[],[],[],[],[24,26,28,30,32,34,36,38],{"_key":25},"UBUNTU-CVE-2023-52446",{"_key":27},"DEBIAN-CVE-2023-52446",{"_key":29},"USN-6818-1",{"_key":31},"USN-6818-3",{"_key":33},"USN-6818-4",{"_key":35},"USN-6819-1",{"_key":37},"USN-6819-3",{"_key":39},"USN-6819-4",[],[42,44,46],{"_key":43},"USN-6765-1",{"_key":45},"USN-6818-2",{"_key":47},"USN-6819-2","2024-02-22T16:21:38.408Z","2026-05-11T19:27:29.463Z","Modified",{"cisa_kev":52,"cisa_ransomware":52,"cisa_vendor":9,"epss_severity":53,"epss_score":54,"severity":55,"severity_score":56,"severity_version":57,"severity_source":58,"severity_vector":59,"severity_status":50},false,"low",0.00016,"high",7.8,"v3.1","cve.org","CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",[61,67,71],{"url":62,"sources":63,"tags":65},"https://git.kernel.org/stable/c/d048dced8ea5eac6723ae873a40567e6f101ea42",[58,64],"nvd",[66],"Patch",{"url":68,"sources":69,"tags":70},"https://git.kernel.org/stable/c/f9ff6ef1c73cd9e1a6bb1ab3e57c5d141a536306",[58,64],[66],{"url":72,"sources":73,"tags":74},"https://git.kernel.org/stable/c/59e5791f59dd83e8aa72a4e74217eabb6e8cfd90",[58,64],[66],[],{"date":77,"score":54,"percentile":78},"2026-06-03",0.03773,[80,83,86,89,92,95,98,101,104,107,110,113,116,118,121,125,128,131,134,137,140,143,146,149,151,154,157,160,163,166,169,172,175,178,181,184,187,190,193,196,199,202,205,208,211,214,217,220,223,225,228,231,234,237,239,242,244,246,248,251,254,257,260,262,264,266,269,272,274,277,280,283,285,288,290,292,294,297,300,303,306,309,311,313,315,318,320,322,324,327],{"date":81,"score":54,"percentile":82},"2025-11-04",0.02451,{"date":84,"score":54,"percentile":85},"2025-11-05",0.02477,{"date":87,"score":54,"percentile":88},"2025-11-06",0.02503,{"date":90,"score":54,"percentile":91},"2025-11-07",0.02516,{"date":93,"score":54,"percentile":94},"2025-11-08",0.02523,{"date":96,"score":54,"percentile":97},"2025-11-09",0.02525,{"date":99,"score":54,"percentile":100},"2025-11-10",0.02499,{"date":102,"score":54,"percentile":103},"2025-11-11",0.02513,{"date":105,"score":54,"percentile":106},"2025-11-12",0.02527,{"date":108,"score":54,"percentile":109},"2025-11-13",0.02575,{"date":111,"score":54,"percentile":112},"2025-11-14",0.02592,{"date":114,"score":54,"percentile":115},"2025-11-15",0.02621,{"date":117,"score":54,"percentile":115},"2025-11-16",{"date":119,"score":54,"percentile":120},"2025-11-17",0.02608,{"date":122,"score":123,"percentile":124},"2025-11-18",0.00091,0.2188,{"date":126,"score":123,"percentile":127},"2025-11-19",0.21892,{"date":129,"score":123,"percentile":130},"2025-11-20",0.219,{"date":132,"score":54,"percentile":133},"2025-11-21",0.02693,{"date":135,"score":54,"percentile":136},"2025-11-22",0.02691,{"date":138,"score":54,"percentile":139},"2025-11-23",0.02682,{"date":141,"score":54,"percentile":142},"2025-11-24",0.02669,{"date":144,"score":54,"percentile":145},"2025-11-25",0.02649,{"date":147,"score":54,"percentile":148},"2025-11-26",0.02629,{"date":150,"score":54,"percentile":115},"2025-11-27",{"date":152,"score":54,"percentile":153},"2025-11-28",0.0263,{"date":155,"score":54,"percentile":156},"2025-11-29",0.02683,{"date":158,"score":54,"percentile":159},"2025-11-30",0.02685,{"date":161,"score":54,"percentile":162},"2025-12-01",0.02743,{"date":164,"score":54,"percentile":165},"2025-12-02",0.02734,{"date":167,"score":54,"percentile":168},"2025-12-03",0.02735,{"date":170,"score":54,"percentile":171},"2025-12-04",0.02678,{"date":173,"score":54,"percentile":174},"2025-12-05",0.0269,{"date":176,"score":54,"percentile":177},"2025-12-06",0.02705,{"date":179,"score":54,"percentile":180},"2025-12-07",0.02715,{"date":182,"score":54,"percentile":183},"2025-12-08",0.02709,{"date":185,"score":54,"percentile":186},"2025-12-09",0.02729,{"date":188,"score":54,"percentile":189},"2025-12-10",0.02756,{"date":191,"score":54,"percentile":192},"2025-12-11",0.02761,{"date":194,"score":54,"percentile":195},"2025-12-12",0.02774,{"date":197,"score":54,"percentile":198},"2025-12-13",0.02745,{"date":200,"score":54,"percentile":201},"2025-12-14",0.02747,{"date":203,"score":54,"percentile":204},"2025-12-15",0.0274,{"date":206,"score":54,"percentile":207},"2025-12-16",0.02736,{"date":209,"score":54,"percentile":210},"2025-12-17",0.0275,{"date":212,"score":54,"percentile":213},"2025-12-18",0.02757,{"date":215,"score":54,"percentile":216},"2025-12-19",0.02763,{"date":218,"score":54,"percentile":219},"2025-12-20",0.02758,{"date":221,"score":54,"percentile":222},"2025-12-21",0.02759,{"date":224,"score":54,"percentile":192},"2025-12-22",{"date":226,"score":54,"percentile":227},"2025-12-23",0.02764,{"date":229,"score":54,"percentile":230},"2025-12-24",0.02766,{"date":232,"score":54,"percentile":233},"2025-12-25",0.02773,{"date":235,"score":54,"percentile":236},"2025-12-26",0.02775,{"date":238,"score":54,"percentile":189},"2025-12-27",{"date":240,"score":54,"percentile":241},"2025-12-28",0.02769,{"date":243,"score":54,"percentile":219},"2025-12-29",{"dat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