CVE-2022-49972

Packet corruption via incomplete shared-UMEM DMA initialization

Published Jun 18, 2025 · Updated Aug 5, 2026

Packet corruption in Linux 5.16 through 5.19.7 allows local users to disrupt AF_XDP traffic through shared aligned UMEM sockets. The xsk buffer-pool initializer populates per-entry DMA addresses only for the first socket, leaving later sockets with invalid DMA state. Triggering requires CAP_NET_RAW, aligned XDP_SHARED_UMEM mode, a second socket, and a zero-copy-capable network device; corrupted packets and kernel or device failure can follow.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Packet corruption in Linux 5.16 through 5.19.7 allows local users to disrupt AF_XDP traffic through shared aligned UMEM sockets. The xsk buffer-pool initializer populates per-entry DMA addresses only for the first socket, leaving later sockets with invalid DMA state. Triggering requires CAP_NET_RAW, aligned XDP_SHARED_UMEM mode, a second socket, and a zero-copy-capable network device; corrupted packets and kernel or device failure can follow.

The record

CVE
CVE-2022-49972
Published
Jun 18, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=5.16
  2. Affected versionversion=94033cd8e73b8632bab7c8b7bb54caa4f5616db7 <2c75891d56ab6fe5ba0d415bfad91d514a4027cd
  3. Affected versionversion=94033cd8e73b8632bab7c8b7bb54caa4f5616db7 <58ca14ed98c87cfe0d1408cc65a9745d9e9b7a56

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=94033cd8e73b8632bab7c8b7bb54caa4f5616db7 <2c75891d56ab6fe5ba0d415bfad91d514a4027cd; version=94033cd8e73b8632bab7c8b7bb54caa4f5616db7 <58ca14ed98c87cfe0d1408cc65a9745d9e9b7a56

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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