ghsa-f95c-c99f-h2mq
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
iavf: Fix use-after-free in free_netdev
We do netif_napi_add() for all allocated q_vectors[], but potentially do netif_napi_del() for part of them, then kfree q_vectors and leave invalid pointers at dev->napi_list.
Reproducer:
[root@host ~]# cat repro.sh #!/bin/bash
pf_dbsf="0000:41:00.0" vf0_dbsf="0000:41:02.0" g_pids=()
function do_set_numvf() { echo 2 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs sleep $((RANDOM%3+1)) echo 0 >/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs sleep $((RANDOM%3+1)) }
function do_set_channel() { local nic=$(ls -1 --indicator-style=none /sys/bus/pci/devices/${vf0_dbsf}/net/) [ -z "$nic" ] && { sleep $((RANDOM%3)) ; return 1; } ifconfig $nic 192.168.18.5 netmask 255.255.255.0 ifconfig $nic up ethtool -L $nic combined 1 ethtool -L $nic combined 4 sleep $((RANDOM%3)) }
function on_exit() { local pid for pid in "${g_pids[@]}"; do kill -0 "$pid" &>/dev/null && kill "$pid" &>/dev/null done g_pids=() }
trap "on_exit; exit" EXIT
while :; do do_set_numvf ; done & g_pids+=($!) while :; do do_set_channel ; done & g_pids+=($!)
wait
Result:
[ 4093.900222] ================================================================== [ 4093.900230] BUG: KASAN: use-after-free in free_netdev+0x308/0x390 [ 4093.900232] Read of size 8 at addr ffff88b4dc145640 by task repro.sh/6699 [ 4093.900233] [ 4093.900236] CPU: 10 PID: 6699 Comm: repro.sh Kdump: loaded Tainted: G O --------- -t - 4.18.0 #1 [ 4093.900238] Hardware name: Powerleader PR2008AL/H12DSi-N6, BIOS 2.0 04/09/2021 [ 4093.900239] Call Trace: [ 4093.900244] dump_stack+0x71/0xab [ 4093.900249] print_address_description+0x6b/0x290 [ 4093.900251] ? free_netdev+0x308/0x390 [ 4093.900252] kasan_report+0x14a/0x2b0 [ 4093.900254] free_netdev+0x308/0x390 [ 4093.900261] iavf_remove+0x825/0xd20 [iavf] [ 4093.900265] pci_device_remove+0xa8/0x1f0 [ 4093.900268] device_release_driver_internal+0x1c6/0x460 [ 4093.900271] pci_stop_bus_device+0x101/0x150 [ 4093.900273] pci_stop_and_remove_bus_device+0xe/0x20 [ 4093.900275] pci_iov_remove_virtfn+0x187/0x420 [ 4093.900277] ? pci_iov_add_virtfn+0xe10/0xe10 [ 4093.900278] ? pci_get_subsys+0x90/0x90 [ 4093.900280] sriov_disable+0xed/0x3e0 [ 4093.900282] ? bus_find_device+0x12d/0x1a0 [ 4093.900290] i40e_free_vfs+0x754/0x1210 [i40e] [ 4093.900298] ? i40e_reset_all_vfs+0x880/0x880 [i40e] [ 4093.900299] ? pci_get_device+0x7c/0x90 [ 4093.900300] ? pci_get_subsys+0x90/0x90 [ 4093.900306] ? pci_vfs_assigned.part.7+0x144/0x210 [ 4093.900309] ? __mutex_lock_slowpath+0x10/0x10 [ 4093.900315] i40e_pci_sriov_configure+0x1fa/0x2e0 [i40e] [ 4093.900318] sriov_numvfs_store+0x214/0x290 [ 4093.900320] ? sriov_totalvfs_show+0x30/0x30 [ 4093.900321] ? __mutex_lock_slowpath+0x10/0x10 [ 4093.900323] ? __check_object_size+0x15a/0x350 [ 4093.900326] kernfs_fop_write+0x280/0x3f0 [ 4093.900329] vfs_write+0x145/0x440 [ 4093.900330] ksys_write+0xab/0x160 [ 4093.900332] ? __ia32_sys_read+0xb0/0xb0 [ 4093.900334] ? fput_many+0x1a/0x120 [ 4093.900335] ? filp_close+0xf0/0x130 [ 4093.900338] do_syscall_64+0xa0/0x370 [ 4093.900339] ? page_fault+0x8/0x30 [ 4093.900341] entry_SYSCALL_64_after_hwframe+0x65/0xca [ 4093.900357] RIP: 0033:0x7f16ad4d22c0 [ 4093.900359] Code: 73 01 c3 48 8b 0d d8 cb 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 24 2d 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe dd 01 00 48 89 04 24 [ 4093.900360] RSP: 002b:00007ffd6491b7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 4093.900362] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f16ad4d22c0 [ 4093.900363] RDX: 0000000000000002 RSI: 0000000001a41408 RDI: 0000000000000001 [ 4093.900364] RBP: 0000000001a41408 R08: 00007f16ad7a1780 R09: 00007f16ae1f2700 [ 4093.9003 ---truncated---
{
"affected": [],
"aliases": [
"CVE-2023-53556"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-04T16:15:50Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\niavf: Fix use-after-free in free_netdev\n\nWe do netif_napi_add() for all allocated q_vectors[], but potentially\ndo netif_napi_del() for part of them, then kfree q_vectors and leave\ninvalid pointers at dev-\u003enapi_list.\n\nReproducer:\n\n [root@host ~]# cat repro.sh\n #!/bin/bash\n\n pf_dbsf=\"0000:41:00.0\"\n vf0_dbsf=\"0000:41:02.0\"\n g_pids=()\n\n function do_set_numvf()\n {\n echo 2 \u003e/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs\n sleep $((RANDOM%3+1))\n echo 0 \u003e/sys/bus/pci/devices/${pf_dbsf}/sriov_numvfs\n sleep $((RANDOM%3+1))\n }\n\n function do_set_channel()\n {\n local nic=$(ls -1 --indicator-style=none /sys/bus/pci/devices/${vf0_dbsf}/net/)\n [ -z \"$nic\" ] \u0026\u0026 { sleep $((RANDOM%3)) ; return 1; }\n ifconfig $nic 192.168.18.5 netmask 255.255.255.0\n ifconfig $nic up\n ethtool -L $nic combined 1\n ethtool -L $nic combined 4\n sleep $((RANDOM%3))\n }\n\n function on_exit()\n {\n local pid\n for pid in \"${g_pids[@]}\"; do\n kill -0 \"$pid\" \u0026\u003e/dev/null \u0026\u0026 kill \"$pid\" \u0026\u003e/dev/null\n done\n g_pids=()\n }\n\n trap \"on_exit; exit\" EXIT\n\n while :; do do_set_numvf ; done \u0026\n g_pids+=($!)\n while :; do do_set_channel ; done \u0026\n g_pids+=($!)\n\n wait\n\nResult:\n\n[ 4093.900222] ==================================================================\n[ 4093.900230] BUG: KASAN: use-after-free in free_netdev+0x308/0x390\n[ 4093.900232] Read of size 8 at addr ffff88b4dc145640 by task repro.sh/6699\n[ 4093.900233]\n[ 4093.900236] CPU: 10 PID: 6699 Comm: repro.sh Kdump: loaded Tainted: G O --------- -t - 4.18.0 #1\n[ 4093.900238] Hardware name: Powerleader PR2008AL/H12DSi-N6, BIOS 2.0 04/09/2021\n[ 4093.900239] Call Trace:\n[ 4093.900244] dump_stack+0x71/0xab\n[ 4093.900249] print_address_description+0x6b/0x290\n[ 4093.900251] ? free_netdev+0x308/0x390\n[ 4093.900252] kasan_report+0x14a/0x2b0\n[ 4093.900254] free_netdev+0x308/0x390\n[ 4093.900261] iavf_remove+0x825/0xd20 [iavf]\n[ 4093.900265] pci_device_remove+0xa8/0x1f0\n[ 4093.900268] device_release_driver_internal+0x1c6/0x460\n[ 4093.900271] pci_stop_bus_device+0x101/0x150\n[ 4093.900273] pci_stop_and_remove_bus_device+0xe/0x20\n[ 4093.900275] pci_iov_remove_virtfn+0x187/0x420\n[ 4093.900277] ? pci_iov_add_virtfn+0xe10/0xe10\n[ 4093.900278] ? pci_get_subsys+0x90/0x90\n[ 4093.900280] sriov_disable+0xed/0x3e0\n[ 4093.900282] ? bus_find_device+0x12d/0x1a0\n[ 4093.900290] i40e_free_vfs+0x754/0x1210 [i40e]\n[ 4093.900298] ? i40e_reset_all_vfs+0x880/0x880 [i40e]\n[ 4093.900299] ? pci_get_device+0x7c/0x90\n[ 4093.900300] ? pci_get_subsys+0x90/0x90\n[ 4093.900306] ? pci_vfs_assigned.part.7+0x144/0x210\n[ 4093.900309] ? __mutex_lock_slowpath+0x10/0x10\n[ 4093.900315] i40e_pci_sriov_configure+0x1fa/0x2e0 [i40e]\n[ 4093.900318] sriov_numvfs_store+0x214/0x290\n[ 4093.900320] ? sriov_totalvfs_show+0x30/0x30\n[ 4093.900321] ? __mutex_lock_slowpath+0x10/0x10\n[ 4093.900323] ? __check_object_size+0x15a/0x350\n[ 4093.900326] kernfs_fop_write+0x280/0x3f0\n[ 4093.900329] vfs_write+0x145/0x440\n[ 4093.900330] ksys_write+0xab/0x160\n[ 4093.900332] ? __ia32_sys_read+0xb0/0xb0\n[ 4093.900334] ? fput_many+0x1a/0x120\n[ 4093.900335] ? filp_close+0xf0/0x130\n[ 4093.900338] do_syscall_64+0xa0/0x370\n[ 4093.900339] ? page_fault+0x8/0x30\n[ 4093.900341] entry_SYSCALL_64_after_hwframe+0x65/0xca\n[ 4093.900357] RIP: 0033:0x7f16ad4d22c0\n[ 4093.900359] Code: 73 01 c3 48 8b 0d d8 cb 2c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 24 2d 00 00 75 10 b8 01 00 00 00 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe dd 01 00 48 89 04 24\n[ 4093.900360] RSP: 002b:00007ffd6491b7f8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001\n[ 4093.900362] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f16ad4d22c0\n[ 4093.900363] RDX: 0000000000000002 RSI: 0000000001a41408 RDI: 0000000000000001\n[ 4093.900364] RBP: 0000000001a41408 R08: 00007f16ad7a1780 R09: 00007f16ae1f2700\n[ 4093.9003\n---truncated---",
"id": "GHSA-f95c-c99f-h2mq",
"modified": "2025-10-04T18:31:15Z",
"published": "2025-10-04T18:31:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53556"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/17046107ca15d7571551539d94e76aba2bf71fd3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/345c44e18cc10cded85cb9134830e1684495c866"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5f4fa1672d98fe99d2297b03add35346f1685d6b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8d781a9c53034813c3194b7d94409c7d24ac73eb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a4635f190f332304db4a49e827ece790b804b5db"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ca12b98e04b5d1902ac08fe826d3500cb4b6e891"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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