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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-64547
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-27 21:17:07 UTC
Updated2026-07-30 06:25:58 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

EPSS: 0.002770000 probability, percentile 0.199960000 (date 2026-08-02)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 904813cd8a0b334189da285bb05af0b18b062502 f42217fa7d535e9ec4151f7971f06f6ea65e850a git Not specified
CNA Linux Linux affected 904813cd8a0b334189da285bb05af0b18b062502 c087749815379e9af2fdbeb08bfc33870b103958 git Not specified
CNA Linux Linux affected 904813cd8a0b334189da285bb05af0b18b062502 e4a87126c085b097d29e17e3b7647295bba8be7c git Not specified
CNA Linux Linux affected 904813cd8a0b334189da285bb05af0b18b062502 685e92934f11d5e215dad58813e2f9955ac2f436 git Not specified
CNA Linux Linux affected 904813cd8a0b334189da285bb05af0b18b062502 4dc8484be3302d187274364820d3bef6c62bde32 git Not specified
CNA Linux Linux affected 904813cd8a0b334189da285bb05af0b18b062502 b153cfe84b1340c69a13d0957665a2bfcf21239c git Not specified
CNA Linux Linux affected 904813cd8a0b334189da285bb05af0b18b062502 ea866cab12db1a2100b400a8b03569e5bc0ee29a git Not specified
CNA Linux Linux affected 904813cd8a0b334189da285bb05af0b18b062502 03f384bc0cb8d4a1301d4f5b0baef2d980258383 git Not specified
CNA Linux Linux affected 2.6.14 Not specified
CNA Linux Linux unaffected 2.6.14 semver Not specified
CNA Linux Linux unaffected 5.10.261 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.212 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.178 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.145 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.97 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ea866cab12db1a2100b400a8b03569e5bc0ee29a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c087749815379e9af2fdbeb08bfc33870b103958 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4dc8484be3302d187274364820d3bef6c62bde32 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e4a87126c085b097d29e17e3b7647295bba8be7c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/03f384bc0cb8d4a1301d4f5b0baef2d980258383 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/685e92934f11d5e215dad58813e2f9955ac2f436 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f42217fa7d535e9ec4151f7971f06f6ea65e850a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b153cfe84b1340c69a13d0957665a2bfcf21239c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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