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CVE-2026-64547

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.261, 5.15.212, 6.1.178, 6.6.145, 6.12.97, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Linux Linux

    From 904813cd8a0b334189da285bb05af0b18b062502 · fixed in f42217fa7d535e9ec4151f7971f06f6ea65e850a; From 904813cd8a0b334189da285bb05af0b18b062502 · fixed in c087749815379e9af2fdbeb08bfc33870b103958; From 904813cd8a0b334189da285bb05af0b18b062502 · fixed in e4a87126c085b097d29e17e3b7647295bba8be7c; From 904813cd8a0b334189da285bb05af0b18b062502 · fixed in 685e92934f11d5e215dad58813e2f9955ac2f436; From 904813cd8a0b334189da285bb05af0b18b062502 · fixed in 4dc8484be3302d187274364820d3bef6c62bde32; From 904813cd8a0b334189da285bb05af0b18b062502 · fixed in b153cfe84b1340c69a13d0957665a2bfcf21239c; From 904813cd8a0b334189da285bb05af0b18b062502 · fixed in ea866cab12db1a2100b400a8b03569e5bc0ee29a; From 904813cd8a0b334189da285bb05af0b18b062502 · fixed in 03f384bc0cb8d4a1301d4f5b0baef2d980258383

  • Linux Linux

    2.6.14

  • KernelLinux

    From 2.6.14 · fixed in 5.10.261; From 5.11.0 · fixed in 5.15.212; From 5.16.0 · fixed in 6.1.178; From 6.2.0 · fixed in 6.6.145; From 6.7.0 · fixed in 6.12.97; From 6.13.0 · fixed in 6.18.40; From 6.19.0 · fixed in 7.1.5

References 8

git.kernel.org