ghsa-vmcx-j4f5-gfcv
Vulnerability from github
Published
2024-04-17 12:32
Modified
2024-04-17 12:32
Details
In the Linux kernel, the following vulnerability has been resolved:
wifi: wfx: fix memory leak when starting AP
Kmemleak reported this error:
unreferenced object 0xd73d1180 (size 184):
comm "wpa_supplicant", pid 1559, jiffies 13006305 (age 964.245s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 1e 00 01 00 00 00 00 00 ................
backtrace:
[<5ca11420>] kmem_cache_alloc+0x20c/0x5ac
[<127bdd74>] __alloc_skb+0x144/0x170
[<fb8a5e38>] __netdev_alloc_skb+0x50/0x180
[<0f9fa1d5>] __ieee80211_beacon_get+0x290/0x4d4 [mac80211]
[<7accd02d>] ieee80211_beacon_get_tim+0x54/0x18c [mac80211]
[<41e25cc3>] wfx_start_ap+0xc8/0x234 [wfx]
[<93a70356>] ieee80211_start_ap+0x404/0x6b4 [mac80211]
[<a4a661cd>] nl80211_start_ap+0x76c/0x9e0 [cfg80211]
[<47bd8b68>] genl_rcv_msg+0x198/0x378
[<453ef796>] netlink_rcv_skb+0xd0/0x130
[<6b7c977a>] genl_rcv+0x34/0x44
[<66b2d04d>] netlink_unicast+0x1b4/0x258
[<f965b9b6>] netlink_sendmsg+0x1e8/0x428
[<aadb8231>] ____sys_sendmsg+0x1e0/0x274
[<d2b5212d>] ___sys_sendmsg+0x80/0xb4
[<69954f45>] __sys_sendmsg+0x64/0xa8
unreferenced object 0xce087000 (size 1024):
comm "wpa_supplicant", pid 1559, jiffies 13006305 (age 964.246s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
10 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00 ...@............
backtrace:
[<9a993714>] __kmalloc_track_caller+0x230/0x600
[<f83ea192>] kmalloc_reserve.constprop.0+0x30/0x74
[<a2c61343>] __alloc_skb+0xa0/0x170
[<fb8a5e38>] __netdev_alloc_skb+0x50/0x180
[<0f9fa1d5>] __ieee80211_beacon_get+0x290/0x4d4 [mac80211]
[<7accd02d>] ieee80211_beacon_get_tim+0x54/0x18c [mac80211]
[<41e25cc3>] wfx_start_ap+0xc8/0x234 [wfx]
[<93a70356>] ieee80211_start_ap+0x404/0x6b4 [mac80211]
[<a4a661cd>] nl80211_start_ap+0x76c/0x9e0 [cfg80211]
[<47bd8b68>] genl_rcv_msg+0x198/0x378
[<453ef796>] netlink_rcv_skb+0xd0/0x130
[<6b7c977a>] genl_rcv+0x34/0x44
[<66b2d04d>] netlink_unicast+0x1b4/0x258
[<f965b9b6>] netlink_sendmsg+0x1e8/0x428
[<aadb8231>] ____sys_sendmsg+0x1e0/0x274
[<d2b5212d>] ___sys_sendmsg+0x80/0xb4
However, since the kernel is build optimized, it seems the stack is not accurate. It appears the issue is related to wfx_set_mfp_ap(). The issue is obvious in this function: memory allocated by ieee80211_beacon_get() is never released. Fixing this leak makes kmemleak happy.
{
"affected": [],
"aliases": [
"CVE-2024-26896"
],
"database_specific": {
"cwe_ids": [
"CWE-125"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-04-17T11:15:10Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: wfx: fix memory leak when starting AP\n\nKmemleak reported this error:\n\n unreferenced object 0xd73d1180 (size 184):\n comm \"wpa_supplicant\", pid 1559, jiffies 13006305 (age 964.245s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 00 00 00 00 00 00 00 00 1e 00 01 00 00 00 00 00 ................\n backtrace:\n [\u003c5ca11420\u003e] kmem_cache_alloc+0x20c/0x5ac\n [\u003c127bdd74\u003e] __alloc_skb+0x144/0x170\n [\u003cfb8a5e38\u003e] __netdev_alloc_skb+0x50/0x180\n [\u003c0f9fa1d5\u003e] __ieee80211_beacon_get+0x290/0x4d4 [mac80211]\n [\u003c7accd02d\u003e] ieee80211_beacon_get_tim+0x54/0x18c [mac80211]\n [\u003c41e25cc3\u003e] wfx_start_ap+0xc8/0x234 [wfx]\n [\u003c93a70356\u003e] ieee80211_start_ap+0x404/0x6b4 [mac80211]\n [\u003ca4a661cd\u003e] nl80211_start_ap+0x76c/0x9e0 [cfg80211]\n [\u003c47bd8b68\u003e] genl_rcv_msg+0x198/0x378\n [\u003c453ef796\u003e] netlink_rcv_skb+0xd0/0x130\n [\u003c6b7c977a\u003e] genl_rcv+0x34/0x44\n [\u003c66b2d04d\u003e] netlink_unicast+0x1b4/0x258\n [\u003cf965b9b6\u003e] netlink_sendmsg+0x1e8/0x428\n [\u003caadb8231\u003e] ____sys_sendmsg+0x1e0/0x274\n [\u003cd2b5212d\u003e] ___sys_sendmsg+0x80/0xb4\n [\u003c69954f45\u003e] __sys_sendmsg+0x64/0xa8\n unreferenced object 0xce087000 (size 1024):\n comm \"wpa_supplicant\", pid 1559, jiffies 13006305 (age 964.246s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................\n 10 00 07 40 00 00 00 00 00 00 00 00 00 00 00 00 ...@............\n backtrace:\n [\u003c9a993714\u003e] __kmalloc_track_caller+0x230/0x600\n [\u003cf83ea192\u003e] kmalloc_reserve.constprop.0+0x30/0x74\n [\u003ca2c61343\u003e] __alloc_skb+0xa0/0x170\n [\u003cfb8a5e38\u003e] __netdev_alloc_skb+0x50/0x180\n [\u003c0f9fa1d5\u003e] __ieee80211_beacon_get+0x290/0x4d4 [mac80211]\n [\u003c7accd02d\u003e] ieee80211_beacon_get_tim+0x54/0x18c [mac80211]\n [\u003c41e25cc3\u003e] wfx_start_ap+0xc8/0x234 [wfx]\n [\u003c93a70356\u003e] ieee80211_start_ap+0x404/0x6b4 [mac80211]\n [\u003ca4a661cd\u003e] nl80211_start_ap+0x76c/0x9e0 [cfg80211]\n [\u003c47bd8b68\u003e] genl_rcv_msg+0x198/0x378\n [\u003c453ef796\u003e] netlink_rcv_skb+0xd0/0x130\n [\u003c6b7c977a\u003e] genl_rcv+0x34/0x44\n [\u003c66b2d04d\u003e] netlink_unicast+0x1b4/0x258\n [\u003cf965b9b6\u003e] netlink_sendmsg+0x1e8/0x428\n [\u003caadb8231\u003e] ____sys_sendmsg+0x1e0/0x274\n [\u003cd2b5212d\u003e] ___sys_sendmsg+0x80/0xb4\n\nHowever, since the kernel is build optimized, it seems the stack is not\naccurate. It appears the issue is related to wfx_set_mfp_ap(). The issue\nis obvious in this function: memory allocated by ieee80211_beacon_get()\nis never released. Fixing this leak makes kmemleak happy.",
"id": "GHSA-vmcx-j4f5-gfcv",
"modified": "2024-04-17T12:32:05Z",
"published": "2024-04-17T12:32:05Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-26896"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/12f00a367b2b62756e0396f14b54c2c15524e1c3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3a71ec74e5e3478d202a1874f085ca3ef40be49b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a1f57a0127b89a6b6620514564aa7eaec16d9af3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b8cfb7c819dd39965136a66fe3a7fde688d976fc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dadbb5d29d6c5f571a50272fce8c1505a9559487"
}
],
"schema_version": "1.4.0",
"severity": []
}
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