[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"repo-stars":3,"vuln-DEBIAN-CVE-2021-47589":6},{"stargazers_count":4,"fetched_at":5},7,"2026-06-04T14:53:31.930Z",{"id":7,"descriptions":8,"cisa":9,"weaknesses":10,"exploits":11,"aliases":12,"duplicate_of":9,"upstream":13,"downstream":16,"duplicates":17,"related":18,"reserved_at":9,"published_at":19,"modified_at":20,"state":9,"summary":21,"references_raw":23,"kevs":30,"epss":9,"epss_history":31,"metrics":32,"affected":39},"DEBIAN-CVE-2021-47589","In the Linux kernel, the following vulnerability has been resolved:  igbvf: fix double free in `igbvf_probe`  In `igbvf_probe`, if register_netdev() fails, the program will go to label err_hw_init, and then to label err_ioremap. In free_netdev() which is just below label err_ioremap, there is `list_for_each_entry_safe` and `netif_napi_del` which aims to delete all entries in `dev->napi_list`. The program has added an entry `adapter->rx_ring->napi` which is added by `netif_napi_add` in igbvf_alloc_queues(). However, adapter->rx_ring has been freed below label err_hw_init. So this a UAF.  In terms of how to patch the problem, we can refer to igbvf_remove() and delete the entry before `adapter->rx_ring`.  The KASAN logs are as follows:  [   35.126075] BUG: KASAN: use-after-free in free_netdev+0x1fd/0x450 [   35.127170] Read of size 8 at addr ffff88810126d990 by task modprobe/366 [   35.128360] [   35.128643] CPU: 1 PID: 366 Comm: modprobe Not tainted 5.15.0-rc2+ #14 [   35.129789] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014 [   35.131749] Call Trace: [   35.132199]  dump_stack_lvl+0x59/0x7b [   35.132865]  print_address_description+0x7c/0x3b0 [   35.133707]  ? free_netdev+0x1fd/0x450 [   35.134378]  __kasan_report+0x160/0x1c0 [   35.135063]  ? free_netdev+0x1fd/0x450 [   35.135738]  kasan_report+0x4b/0x70 [   35.136367]  free_netdev+0x1fd/0x450 [   35.137006]  igbvf_probe+0x121d/0x1a10 [igbvf] [   35.137808]  ? igbvf_vlan_rx_add_vid+0x100/0x100 [igbvf] [   35.138751]  local_pci_probe+0x13c/0x1f0 [   35.139461]  pci_device_probe+0x37e/0x6c0 [   35.165526] [   35.165806] Allocated by task 366: [   35.166414]  ____kasan_kmalloc+0xc4/0xf0 [   35.167117]  foo_kmem_cache_alloc_trace+0x3c/0x50 [igbvf] [   35.168078]  igbvf_probe+0x9c5/0x1a10 [igbvf] [   35.168866]  local_pci_probe+0x13c/0x1f0 [   35.169565]  pci_device_probe+0x37e/0x6c0 [   35.179713] [   35.179993] Freed by task 366: [   35.180539]  kasan_set_track+0x4c/0x80 [   35.181211]  kasan_set_free_info+0x1f/0x40 [   35.181942]  ____kasan_slab_free+0x103/0x140 [   35.182703]  kfree+0xe3/0x250 [   35.183239]  igbvf_probe+0x1173/0x1a10 [igbvf] [   35.184040]  local_pci_probe+0x13c/0x1f0",null,[],[],[],[14],{"_key":15},"CVE-2021-47589",[],[],[],"2024-06-19T15:15:53.490Z","2026-04-28T20:23:33.094429Z",{"cisa_kev":22,"cisa_ransomware":22,"cisa_vendor":9,"epss_severity":9,"epss_score":9,"severity":9,"severity_score":9,"severity_version":9,"severity_source":9,"severity_vector":9,"severity_status":9},false,[24],{"url":25,"sources":26,"tags":28},"https://security-tracker.debian.org/tracker/CVE-2021-47589",[27],"osv_debian",[29],"Advisory",[],[],[33],{"source":27,"cvss_v2_0":9,"cvss_v3_0":9,"cvss_v3_1":34,"cvss_v4_0":9},{"baseScore":35,"baseSeverity":9,"vectorString":36,"impactScore":37,"exploitabilityScore":38},7.8,"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",9.8,4.6,[40],{"ecosystem":41,"name":42,"vendor":43,"product":42,"cpe_part":9,"purl_type":44,"purl_namespace":43,"purl_name":42,"source":9,"versions":45},"Debian","linux","debian","deb",[46,52,55,56],{"version":47,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":50,"version_end_type":51,"fixed_in":9},"lt5_10_92_1",true,"ecosystem","5.10.92-1","excluding",{"version":53,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":54,"version_end_type":51,"fixed_in":9},"lt5_15_15_1","5.15.15-1",{"version":53,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":54,"version_end_type":51,"fixed_in":9},{"version":53,"is_range":48,"range_type":49,"version_start":9,"version_start_type":9,"version_end":54,"version_end_type":51,"fixed_in":9}]