CVE-2022-49911Public exploit

Service interruption via unbounded ipset interface entries

Published May 1, 2025 · Updated May 11, 2026

Resource exhaustion in the Linux kernel allows local users to cause allocation failure through crafted hash:net,iface ipset entries. The ipset hash:net,iface insertion path accepts more than 64 interfaces for one network prefix, allowing its resize allocation to grow toward a gigabyte. Exploitation requires local privileges sufficient to manage ipset sets and can consume huge kernel memory, interrupting service through allocation failure.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in the Linux kernel allows local users to cause allocation failure through crafted hash:net,iface ipset entries. The ipset hash:net,iface insertion path accepts more than 64 interfaces for one network prefix, allowing its resize allocation to grow toward a gigabyte. Exploitation requires local privileges sufficient to manage ipset sets and can consume huge kernel memory, interrupting service through allocation failure.

The record

CVE
CVE-2022-49911
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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=5.11
  2. Affected versionversion=ccf0a4b7fc688561428290265e4effde41446668 <42d20d5e24575c9afa2d66d9a51e7386db9514f5
  3. Affected versionversion=ccf0a4b7fc688561428290265e4effde41446668 <510841da1fcc16f702440ab58ef0b4d82a9056b7
  4. Affected versionversion=ccf0a4b7fc688561428290265e4effde41446668 <a37ef32fe5956fe9248df68f6a61997845ba047e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=ccf0a4b7fc688561428290265e4effde41446668 <42d20d5e24575c9afa2d66d9a51e7386db9514f5; version=ccf0a4b7fc688561428290265e4effde41446668 <510841da1fcc16f702440ab58ef0b4d82a9056b7; version=ccf0a4b7fc688561428290265e4effde41446668 <a37ef32fe5956fe9248df68f6a61997845ba047e

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

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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