CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
EPSS
Percentile
5.0%
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
Vendor | Product | Version | CPE |
---|---|---|---|
linux | linux_kernel | * | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/ethernet/intel/igbvf/netdev.c"
],
"versions": [
{
"version": "d4e0fe01a38a",
"lessThan": "ffe1695b6787",
"status": "affected",
"versionType": "git"
},
{
"version": "d4e0fe01a38a",
"lessThan": "79d9b092035d",
"status": "affected",
"versionType": "git"
},
{
"version": "d4e0fe01a38a",
"lessThan": "8d0c927a9fb2",
"status": "affected",
"versionType": "git"
},
{
"version": "d4e0fe01a38a",
"lessThan": "cc9b655bb84f",
"status": "affected",
"versionType": "git"
},
{
"version": "d4e0fe01a38a",
"lessThan": "8addba6cab94",
"status": "affected",
"versionType": "git"
},
{
"version": "d4e0fe01a38a",
"lessThan": "74a16e062b23",
"status": "affected",
"versionType": "git"
},
{
"version": "d4e0fe01a38a",
"lessThan": "944b8be08131",
"status": "affected",
"versionType": "git"
},
{
"version": "d4e0fe01a38a",
"lessThan": "b6d335a60dc6",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/net/ethernet/intel/igbvf/netdev.c"
],
"versions": [
{
"version": "2.6.30",
"status": "affected"
},
{
"version": "0",
"lessThan": "2.6.30",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.4.296",
"lessThanOrEqual": "4.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.9.294",
"lessThanOrEqual": "4.9.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.14.259",
"lessThanOrEqual": "4.14.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.19.222",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.4.168",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.88",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.11",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.16",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/74a16e062b23332d8db017ff4a41e16279c44411
git.kernel.org/stable/c/79d9b092035dcdbe636b70433149df9cc6db1e49
git.kernel.org/stable/c/8addba6cab94ce01686ea2e80ed1530f9dc33a9a
git.kernel.org/stable/c/8d0c927a9fb2b4065230936b77b54f857a3754fc
git.kernel.org/stable/c/944b8be08131f5faf2cd2440aa1c24a39a163a54
git.kernel.org/stable/c/b6d335a60dc624c0d279333b22c737faa765b028
git.kernel.org/stable/c/cc9b655bb84f1be283293dfea94dff9a31b106ac
git.kernel.org/stable/c/ffe1695b678729edec04037e691007900a2b2beb