GHSA-WXQX-M575-FH25
Vulnerability from github – Published: 2026-07-27 21:31 – Updated: 2026-07-30 06:32In the Linux kernel, the following vulnerability has been resolved:
net: usb: net1080: validate packet_len before pad-byte access in rx_fixup
For an even packet_len, net1080_rx_fixup() reads the pad byte at skb->data[packet_len] before the skb->len != packet_len check further down, and packet_len is only bounded against NC_MAX_PACKET. A malicious NetChip 1080 device can send a short frame advertising a large even packet_len (e.g. 0x4000), so the pad-byte read lands past the end of the skb:
BUG: KASAN: slab-out-of-bounds in net1080_rx_fixup Read of size 1 at addr ffff8880106c83c6 by task ksoftirqd/0/14 ... net1080_rx_fixup (drivers/net/usb/net1080.c:384) usbnet_bh (drivers/net/usb/usbnet.c:1589) process_one_work (kernel/workqueue.c:3322) bh_worker (kernel/workqueue.c:3708) tasklet_action (kernel/softirq.c:965) handle_softirqs (kernel/softirq.c:622) ...
Reject the frame when packet_len >= skb->len before reading.
{
"affected": [],
"aliases": [
"CVE-2026-64547"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-07-27T21:17:07Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: net1080: validate packet_len before pad-byte access in rx_fixup\n\nFor an even packet_len, net1080_rx_fixup() reads the pad byte at\nskb-\u003edata[packet_len] before the skb-\u003elen != packet_len check further\ndown, and packet_len is only bounded against NC_MAX_PACKET. A malicious\nNetChip 1080 device can send a short frame advertising a large even\npacket_len (e.g. 0x4000), so the pad-byte read lands past the end of the\nskb:\n\n BUG: KASAN: slab-out-of-bounds in net1080_rx_fixup\n Read of size 1 at addr ffff8880106c83c6 by task ksoftirqd/0/14\n ...\n net1080_rx_fixup (drivers/net/usb/net1080.c:384)\n usbnet_bh (drivers/net/usb/usbnet.c:1589)\n process_one_work (kernel/workqueue.c:3322)\n bh_worker (kernel/workqueue.c:3708)\n tasklet_action (kernel/softirq.c:965)\n handle_softirqs (kernel/softirq.c:622)\n ...\n\nReject the frame when packet_len \u003e= skb-\u003elen before reading.",
"id": "GHSA-wxqx-m575-fh25",
"modified": "2026-07-30T06:32:34Z",
"published": "2026-07-27T21:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64547"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/03f384bc0cb8d4a1301d4f5b0baef2d980258383"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4dc8484be3302d187274364820d3bef6c62bde32"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/685e92934f11d5e215dad58813e2f9955ac2f436"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b153cfe84b1340c69a13d0957665a2bfcf21239c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c087749815379e9af2fdbeb08bfc33870b103958"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e4a87126c085b097d29e17e3b7647295bba8be7c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ea866cab12db1a2100b400a8b03569e5bc0ee29a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f42217fa7d535e9ec4151f7971f06f6ea65e850a"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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