CVE-2022-48910

Local denial of service via IPv6 state toggling

Published Aug 22, 2024 · Updated May 11, 2026

Memory leak in the IPv6 address configuration code in Linux 3.18 allows local users to exhaust kernel memory on a host. Repeated NETDEV_DOWN handling calls ipv6_mc_down() without an intervening ipv6_mc_up(), allocating an ifmcaddr6 tomb entry for each subscribed nontrivial multicast group. Local access can create multicast memberships without privilege, but repeated interface or IPv6 state transitions drive the unbounded leak and eventual service interruption.

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

Memory leak in the IPv6 address configuration code in Linux 3.18 allows local users to exhaust kernel memory on a host. Repeated NETDEV_DOWN handling calls ipv6_mc_down() without an intervening ipv6_mc_up(), allocating an ifmcaddr6 tomb entry for each subscribed nontrivial multicast group. Local access can create multicast memberships without privilege, but repeated interface or IPv6 state transitions drive the unbounded leak and eventual service interruption.

The record

CVE
CVE-2022-48910
Published
Aug 22, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 22, 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=3.18
  2. Affected versionversion=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <24888915364cfa410de62d8abb5df95c3b67455d
  3. Affected versionversion=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <72124e65a70b84e6303a5cd21b0ac1f27d7d61a4
  4. Affected versionversion=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <9588ac2eddc2f223ebcebf6e9f5caed84d32922b
  5. Affected versionversion=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <9995b408f17ff8c7f11bc725c8aa225ba3a63b1c
  6. Affected versionversion=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <9a8736b2da28b24f01707f592ff059b9f90a058c
  7. Affected versionversion=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <b11781515208dd31fbcd0b664078dce5dc44523f
  8. Affected versionversion=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <c71bf3229f9e9dd60ba02f5a5be02066edf57012
  9. Affected versionversion=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <f4c63b24dea9cc2043ff845dcca9aaf8109ea38a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.18; version=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <24888915364cfa410de62d8abb5df95c3b67455d; version=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <72124e65a70b84e6303a5cd21b0ac1f27d7d61a4; version=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <9588ac2eddc2f223ebcebf6e9f5caed84d32922b; version=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <9995b408f17ff8c7f11bc725c8aa225ba3a63b1c; version=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <9a8736b2da28b24f01707f592ff059b9f90a058c; version=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <b11781515208dd31fbcd0b664078dce5dc44523f; version=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <c71bf3229f9e9dd60ba02f5a5be02066edf57012; version=3ce62a84d53cd3d3cc5377bbf339e9b08ddf9c36 <f4c63b24dea9cc2043ff845dcca9aaf8109ea38a

Published CVSS scores

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.

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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