CVE-2022-48810

Local service interruption via unlocked multicast-table cleanup

Published Jul 16, 2024 · Updated May 11, 2026

Improper locking in the Linux kernel 4.0 through 5.16 allows local users to interrupt service during multicast-routing initialization. The ipmr and ip6mr initialization failure paths call ipmr_free_table or ip6mr_free_table without first acquiring the required RTNL lock. Reaching the failure path requires local low-privileged access; the unlocked cleanup triggers an unregister_netdevice_many assertion and disrupts availability.

CVSS severity5.5
Medium
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

Improper locking in the Linux kernel 4.0 through 5.16 allows local users to interrupt service during multicast-routing initialization. The ipmr and ip6mr initialization failure paths call ipmr_free_table or ip6mr_free_table without first acquiring the required RTNL lock. Reaching the failure path requires local low-privileged access; the unlocked cleanup triggers an unregister_netdevice_many assertion and disrupts availability.

The record

CVE
CVE-2022-48810
Published
Jul 16, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 16, 2024CVE 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

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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=4.0
  2. Affected versionversion=f243e5a7859a24d10975afb9a1708cac624ba6f1 <09ac0fcb0a82d647f2c61d3d488d367b7ee5bd51
  3. Affected versionversion=f243e5a7859a24d10975afb9a1708cac624ba6f1 <12b6703e9546902c56b4b9048b893ad49d62bdd4
  4. Affected versionversion=f243e5a7859a24d10975afb9a1708cac624ba6f1 <16dcfde98a25340ff0f7879a16bea141d824a196
  5. Affected versionversion=f243e5a7859a24d10975afb9a1708cac624ba6f1 <3cab045c99dbb9a94eb2d1d405f399916eec698a
  6. Affected versionversion=f243e5a7859a24d10975afb9a1708cac624ba6f1 <5611a00697c8ecc5aad04392bea629e9d6a20463
  7. Affected versionversion=f243e5a7859a24d10975afb9a1708cac624ba6f1 <80c529322600dfb1f985b5e3f14c3c6f522ce154
  8. Affected versionversion=f243e5a7859a24d10975afb9a1708cac624ba6f1 <b541845dfc4e7df551955e70deec0921d6b297c3
  9. Affected versionversion=f243e5a7859a24d10975afb9a1708cac624ba6f1 <feb9597e22755dce782aae26ac0590c06737e049

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.0; version=f243e5a7859a24d10975afb9a1708cac624ba6f1 <09ac0fcb0a82d647f2c61d3d488d367b7ee5bd51; version=f243e5a7859a24d10975afb9a1708cac624ba6f1 <12b6703e9546902c56b4b9048b893ad49d62bdd4; version=f243e5a7859a24d10975afb9a1708cac624ba6f1 <16dcfde98a25340ff0f7879a16bea141d824a196; version=f243e5a7859a24d10975afb9a1708cac624ba6f1 <3cab045c99dbb9a94eb2d1d405f399916eec698a; version=f243e5a7859a24d10975afb9a1708cac624ba6f1 <5611a00697c8ecc5aad04392bea629e9d6a20463; version=f243e5a7859a24d10975afb9a1708cac624ba6f1 <80c529322600dfb1f985b5e3f14c3c6f522ce154; version=f243e5a7859a24d10975afb9a1708cac624ba6f1 <b541845dfc4e7df551955e70deec0921d6b297c3; version=f243e5a7859a24d10975afb9a1708cac624ba6f1 <feb9597e22755dce782aae26ac0590c06737e049

Published CVSS scores

5.5SUSECVSS: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 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-667Improper Locking
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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