CVE-2026-74285

Kernel memory corruption via premature DMA unmapping

Published Aug 15, 2026 · Updated Aug 15, 2026

Race condition in the Linux kernel 7.1 allows local users to corrupt kernel memory during netkit RX queue lease teardown. netif_rxq_cleanup_unlease() revokes provider DMA mappings before stopping the physical queue, so live NAPI processing can reuse entries whose dma_addr was cleared. Reachability requires CAP_NET_ADMIN, netkit queue leasing, ZCRX, and susceptible device or IOMMU behavior; no runtime corruption was demonstrated.

CVSS severity8.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in the Linux kernel 7.1 allows local users to corrupt kernel memory during netkit RX queue lease teardown. netif_rxq_cleanup_unlease() revokes provider DMA mappings before stopping the physical queue, so live NAPI processing can reuse entries whose dma_addr was cleared. Reachability requires CAP_NET_ADMIN, netkit queue leasing, ZCRX, and susceptible device or IOMMU behavior; no runtime corruption was demonstrated.

The record

CVE
CVE-2026-74285
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1068
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5602ad61ebee99c83081fba1aaf5814736edc3e7 <03f4c6ed3cffbfce0b85a3a0193d08a46692a9f8
  2. Affected versionversion=5602ad61ebee99c83081fba1aaf5814736edc3e7 <37314c9dbe95b4d924c7b61aaf563cec4f4e4133
  3. Affected versionversion=7.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5602ad61ebee99c83081fba1aaf5814736edc3e7 <03f4c6ed3cffbfce0b85a3a0193d08a46692a9f8; version=5602ad61ebee99c83081fba1aaf5814736edc3e7 <37314c9dbe95b4d924c7b61aaf563cec4f4e4133; version=7.1

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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