CVE-2022-49461

Kernel memory exhaustion via unreleased advertisement buffers

Published Feb 26, 2025 · Updated May 11, 2026

Memory leak in Linux kernel 5.16 through 5.17.13 and 5.18 through 5.18.2 allows local users to exhaust memory via AMT advertisements. The AMT_MSG_ADVERTISEMENT branch in amt_rcv() exits after handling the message instead of reaching consume_skb(), retaining each packet buffer. Low-privilege local access to a host configured as an AMT gateway is required; accumulated buffers can interrupt service through memory exhaustion.

CVSS severity5.5
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Linux kernel 5.16 through 5.17.13 and 5.18 through 5.18.2 allows local users to exhaust memory via AMT advertisements. The AMT_MSG_ADVERTISEMENT branch in amt_rcv() exits after handling the message instead of reaching consume_skb(), retaining each packet buffer. Low-privilege local access to a host configured as an AMT gateway is required; accumulated buffers can interrupt service through memory exhaustion.

The record

CVE
CVE-2022-49461
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

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=cbc21dc1cfe949e37b2a54c71511579f1899e8d4 <19bb2d57eac86a368839a92117d8a10ab7183623
  3. Affected versionversion=cbc21dc1cfe949e37b2a54c71511579f1899e8d4 <e7322da399fb86a2072f008b56f7160afa1b2051
  4. Affected versionversion=cbc21dc1cfe949e37b2a54c71511579f1899e8d4 <fe29794c3585d039fefebaa2b5a4932a627ad4fd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=cbc21dc1cfe949e37b2a54c71511579f1899e8d4 <19bb2d57eac86a368839a92117d8a10ab7183623; version=cbc21dc1cfe949e37b2a54c71511579f1899e8d4 <e7322da399fb86a2072f008b56f7160afa1b2051; version=cbc21dc1cfe949e37b2a54c71511579f1899e8d4 <fe29794c3585d039fefebaa2b5a4932a627ad4fd

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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.

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
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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