{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-30T18:49:42.593","vulnerabilities":[{"cve":{"id":"CVE-2021-47589","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2024-06-19T15:15:53.490","lastModified":"2024-11-21T06:36:36.933","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nigbvf: fix double free in `igbvf_probe`\n\nIn `igbvf_probe`, if register_netdev() fails, the program will go to\nlabel err_hw_init, and then to label err_ioremap. In free_netdev() which\nis just below label err_ioremap, there is `list_for_each_entry_safe` and\n`netif_napi_del` which aims to delete all entries in `dev->napi_list`.\nThe program has added an entry `adapter->rx_ring->napi` which is added by\n`netif_napi_add` in igbvf_alloc_queues(). However, adapter->rx_ring has\nbeen freed below label err_hw_init. So this a UAF.\n\nIn terms of how to patch the problem, we can refer to igbvf_remove() and\ndelete the entry before `adapter->rx_ring`.\n\nThe KASAN logs are as follows:\n\n[   35.126075] BUG: KASAN: use-after-free in free_netdev+0x1fd/0x450\n[   35.127170] Read of size 8 at addr ffff88810126d990 by task modprobe/366\n[   35.128360]\n[   35.128643] CPU: 1 PID: 366 Comm: modprobe Not tainted 5.15.0-rc2+ #14\n[   35.129789] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014\n[   35.131749] Call Trace:\n[   35.132199]  dump_stack_lvl+0x59/0x7b\n[   35.132865]  print_address_description+0x7c/0x3b0\n[   35.133707]  ? free_netdev+0x1fd/0x450\n[   35.134378]  __kasan_report+0x160/0x1c0\n[   35.135063]  ? free_netdev+0x1fd/0x450\n[   35.135738]  kasan_report+0x4b/0x70\n[   35.136367]  free_netdev+0x1fd/0x450\n[   35.137006]  igbvf_probe+0x121d/0x1a10 [igbvf]\n[   35.137808]  ? igbvf_vlan_rx_add_vid+0x100/0x100 [igbvf]\n[   35.138751]  local_pci_probe+0x13c/0x1f0\n[   35.139461]  pci_device_probe+0x37e/0x6c0\n[   35.165526]\n[   35.165806] Allocated by task 366:\n[   35.166414]  ____kasan_kmalloc+0xc4/0xf0\n[   35.167117]  foo_kmem_cache_alloc_trace+0x3c/0x50 [igbvf]\n[   35.168078]  igbvf_probe+0x9c5/0x1a10 [igbvf]\n[   35.168866]  local_pci_probe+0x13c/0x1f0\n[   35.169565]  pci_device_probe+0x37e/0x6c0\n[   35.179713]\n[   35.179993] Freed by task 366:\n[   35.180539]  kasan_set_track+0x4c/0x80\n[   35.181211]  kasan_set_free_info+0x1f/0x40\n[   35.181942]  ____kasan_slab_free+0x103/0x140\n[   35.182703]  kfree+0xe3/0x250\n[   35.183239]  igbvf_probe+0x1173/0x1a10 [igbvf]\n[   35.184040]  local_pci_probe+0x13c/0x1f0"},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: igbvf: corrige double free en `igbvf_probe` En `igbvf_probe`, si Register_netdev() falla, el programa irá a la etiqueta err_hw_init y luego a la etiqueta err_ioremap. En free_netdev(), que está justo debajo de la etiqueta err_ioremap, están `list_for_each_entry_safe` y `netif_napi_del` que tienen como objetivo eliminar todas las entradas en `dev->napi_list`. El programa ha agregado una entrada `adapter->rx_ring->napi` que se agrega mediante `netif_napi_add` en igbvf_alloc_queues(). Sin embargo, adaptador->rx_ring se ha liberado debajo de la etiqueta err_hw_init. Entonces esto es una UAF. En términos de cómo solucionar el problema, podemos consultar igbvf_remove() y eliminar la entrada antes de `adapter->rx_ring`. Los registros de KASAN son los siguientes: [35.126075] ERROR: KASAN: use-after-free en free_netdev+0x1fd/0x450 [35.127170] Lectura de tamaño 8 en la dirección ffff88810126d990 mediante la tarea modprobe/366 [35.128360] [35.128643] CPU: 1 PID : 366 Comm: modprobe Not tainted 5.15.0-rc2+ #14 [ 35.129789] Nombre del hardware: PC estándar QEMU (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01 /2014 [35.131749] Seguimiento de llamadas: [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] por tarea 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] Liberado por la tarea 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 vf] [35.184040] local_pci_probe+0x13c/0x1f0"}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-415"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.30","versionEndExcluding":"4.4.296","matchCriteriaId":"BCDBDCBF-3E2B-4AF7-952D-EB56D077EBF5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.5","versionEndExcluding":"4.9.294","matchCriteriaId":"BEC14782-2EE3-4635-A927-91559E4F451C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"4.14.259","matchCriteriaId":"390D64FF-1DB7-4DD1-ADEF-CE96BEA2607C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.15","versionEndExcluding":"4.19.222","matchCriteriaId":"2D0D89BC-6CF8-4BFB-8C91-472348052528"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.20","versionEndExcluding":"5.4.168","matchCriteriaId":"195EBAA1-4CCE-4898-9351-F4A0DBCAA022"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.88","matchCriteriaId":"A657B2D0-5B9D-42BE-A3BF-228DBC1B057C"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11","versionEndExcluding":"5.15.11","matchCriteriaId":"11274E95-438A-449A-B100-01B2B0046669"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/74a16e062b23332d8db017ff4a41e16279c44411","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/79d9b092035dcdbe636b70433149df9cc6db1e49","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/8addba6cab94ce01686ea2e80ed1530f9dc33a9a","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/8d0c927a9fb2b4065230936b77b54f857a3754fc","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/944b8be08131f5faf2cd2440aa1c24a39a163a54","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b6d335a60dc624c0d279333b22c737faa765b028","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/cc9b655bb84f1be283293dfea94dff9a31b106ac","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/ffe1695b678729edec04037e691007900a2b2beb","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/74a16e062b23332d8db017ff4a41e16279c44411","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/79d9b092035dcdbe636b70433149df9cc6db1e49","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/8addba6cab94ce01686ea2e80ed1530f9dc33a9a","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/8d0c927a9fb2b4065230936b77b54f857a3754fc","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/944b8be08131f5faf2cd2440aa1c24a39a163a54","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/b6d335a60dc624c0d279333b22c737faa765b028","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/cc9b655bb84f1be283293dfea94dff9a31b106ac","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/ffe1695b678729edec04037e691007900a2b2beb","source":"af854a3a-2127-422b-91ae-364da2661108","tags":["Patch"]}]}}]}