CVE-2026-64547

net: usb: net1080: validate packet_len before pad-byte access in rx_fixup

State: Published
Severity: 8.1 High
Published: Jul 27, 2026
Updated: Oct 19, 2026
Reserved: Jul 19, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	Linux

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
LinuxLinux	904813cd8a0b334189da285bb05af0b18b062502 to before f42217fa7d535e9ec4151f7971f06f6ea65e850aAffected 904813cd8a0b334189da285bb05af0b18b062502 to before c087749815379e9af2fdbeb08bfc33870b103958Affected 904813cd8a0b334189da285bb05af0b18b062502 to before e4a87126c085b097d29e17e3b7647295bba8be7cAffected 904813cd8a0b334189da285bb05af0b18b062502 to before 685e92934f11d5e215dad58813e2f9955ac2f436Affected 904813cd8a0b334189da285bb05af0b18b062502 to before 4dc8484be3302d187274364820d3bef6c62bde32Affected 904813cd8a0b334189da285bb05af0b18b062502 to before b153cfe84b1340c69a13d0957665a2bfcf21239cAffected 904813cd8a0b334189da285bb05af0b18b062502 to before ea866cab12db1a2100b400a8b03569e5bc0ee29aAffected 904813cd8a0b334189da285bb05af0b18b062502 to before 03f384bc0cb8d4a1301d4f5b0baef2d980258383Affected
LinuxLinux	2.6.14Affected before 2.6.14Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

904813cd8a0b334189da285bb05af0b18b062502 to before f42217fa7d535e9ec4151f7971f06f6ea65e850aAffected
904813cd8a0b334189da285bb05af0b18b062502 to before c087749815379e9af2fdbeb08bfc33870b103958Affected
904813cd8a0b334189da285bb05af0b18b062502 to before e4a87126c085b097d29e17e3b7647295bba8be7cAffected
904813cd8a0b334189da285bb05af0b18b062502 to before 685e92934f11d5e215dad58813e2f9955ac2f436Affected
904813cd8a0b334189da285bb05af0b18b062502 to before 4dc8484be3302d187274364820d3bef6c62bde32Affected
904813cd8a0b334189da285bb05af0b18b062502 to before b153cfe84b1340c69a13d0957665a2bfcf21239cAffected
904813cd8a0b334189da285bb05af0b18b062502 to before ea866cab12db1a2100b400a8b03569e5bc0ee29aAffected
904813cd8a0b334189da285bb05af0b18b062502 to before 03f384bc0cb8d4a1301d4f5b0baef2d980258383Affected

LinuxLinux

2.6.14Affected
before 2.6.14Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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