CVE-2026-64547 is a vulnerability in Linux Kernel
Published on July 27, 2026
net: usb: net1080: validate packet_len before pad-byte access in rx_fixup
In 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.
Products Associated with CVE-2026-64547
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Affected Versions
Linux:- Version 904813cd8a0b334189da285bb05af0b18b062502 and below f42217fa7d535e9ec4151f7971f06f6ea65e850a is affected.
- Version 904813cd8a0b334189da285bb05af0b18b062502 and below c087749815379e9af2fdbeb08bfc33870b103958 is affected.
- Version 904813cd8a0b334189da285bb05af0b18b062502 and below e4a87126c085b097d29e17e3b7647295bba8be7c is affected.
- Version 904813cd8a0b334189da285bb05af0b18b062502 and below 685e92934f11d5e215dad58813e2f9955ac2f436 is affected.
- Version 904813cd8a0b334189da285bb05af0b18b062502 and below 4dc8484be3302d187274364820d3bef6c62bde32 is affected.
- Version 904813cd8a0b334189da285bb05af0b18b062502 and below b153cfe84b1340c69a13d0957665a2bfcf21239c is affected.
- Version 904813cd8a0b334189da285bb05af0b18b062502 and below ea866cab12db1a2100b400a8b03569e5bc0ee29a is affected.
- Version 904813cd8a0b334189da285bb05af0b18b062502 and below 03f384bc0cb8d4a1301d4f5b0baef2d980258383 is affected.
- Version 2.6.14 is affected.
- Before 2.6.14 is unaffected.
- Version 5.10.261, <= 5.10.* is unaffected.
- Version 5.15.212, <= 5.15.* is unaffected.
- Version 6.1.178, <= 6.1.* is unaffected.
- Version 6.6.145, <= 6.6.* is unaffected.
- Version 6.12.97, <= 6.12.* is unaffected.
- Version 6.18.40, <= 6.18.* is unaffected.
- Version 7.1.5, <= 7.1.* is unaffected.
- Version 7.2-rc3, <= * is unaffected.