CVE-2022-49727

Local service interruption via L2TP IPv6 length overflow

Published Feb 26, 2025 · Updated May 11, 2026

Integer overflow in affected Linux kernel releases allows local users to crash the system through an oversized L2TP IPv6 message. l2tp_ip6_sendmsg adds the message length to the transport-header length in a signed integer before rejecting values at the limit, allowing the sum to wrap. Exploitation requires low-privileged local access and an L2TP IPv6 socket; the documented consequence is availability loss rather than data disclosure or modification.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in affected Linux kernel releases allows local users to crash the system through an oversized L2TP IPv6 message. l2tp_ip6_sendmsg adds the message length to the transport-header length in a signed integer before rejecting values at the limit, allowing the sum to wrap. Exploitation requires low-privileged local access and an L2TP IPv6 socket; the documented consequence is availability loss rather than data disclosure or modification.

The record

CVE
CVE-2022-49727
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-190, T1499.004
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

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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=3.5
  2. Affected versionversion=a32e0eec7042b21ccb52896cf715e3e2641fed93 <034246122f5c5e2e2a0b9fe04e24517920e9beb1
  3. Affected versionversion=a32e0eec7042b21ccb52896cf715e3e2641fed93 <0e818d433fc2718fe4da044ffca7431812a7e04e
  4. Affected versionversion=a32e0eec7042b21ccb52896cf715e3e2641fed93 <27a37755ceb401111ded76810359d3adc4b268a1
  5. Affected versionversion=a32e0eec7042b21ccb52896cf715e3e2641fed93 <2cf73c7cb6125083408d77f43d0e84d86aed0000
  6. Affected versionversion=a32e0eec7042b21ccb52896cf715e3e2641fed93 <2f42389d270f2304c8855b0b63498a5a4d0c053d
  7. Affected versionversion=a32e0eec7042b21ccb52896cf715e3e2641fed93 <6c4e3486d21173d60925ef52e512cae727b43d30
  8. Affected versionversion=a32e0eec7042b21ccb52896cf715e3e2641fed93 <b8879ca1fd7348b4d5db7db86dcb97f60c73d751
  9. Affected versionversion=a32e0eec7042b21ccb52896cf715e3e2641fed93 <f638a84afef3dfe10554c51820c16e39a278c915

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.5; version=a32e0eec7042b21ccb52896cf715e3e2641fed93 <034246122f5c5e2e2a0b9fe04e24517920e9beb1; version=a32e0eec7042b21ccb52896cf715e3e2641fed93 <0e818d433fc2718fe4da044ffca7431812a7e04e; version=a32e0eec7042b21ccb52896cf715e3e2641fed93 <27a37755ceb401111ded76810359d3adc4b268a1; version=a32e0eec7042b21ccb52896cf715e3e2641fed93 <2cf73c7cb6125083408d77f43d0e84d86aed0000; version=a32e0eec7042b21ccb52896cf715e3e2641fed93 <2f42389d270f2304c8855b0b63498a5a4d0c053d; version=a32e0eec7042b21ccb52896cf715e3e2641fed93 <6c4e3486d21173d60925ef52e512cae727b43d30; version=a32e0eec7042b21ccb52896cf715e3e2641fed93 <b8879ca1fd7348b4d5db7db86dcb97f60c73d751; version=a32e0eec7042b21ccb52896cf715e3e2641fed93 <f638a84afef3dfe10554c51820c16e39a278c915

Published CVSS scores

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

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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-190Integer Overflow or Wraparound
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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