CVE-2024-26641Network attack vector

Kernel crash via truncated IPv6 tunnel packet

Published Mar 18, 2024 · Updated Aug 5, 2026

Use of uninitialized data in affected Linux kernel versions allows remote attackers to crash the kernel via truncated IPv6 tunnel packets. The __ip6_tnl_rcv() path reads DSCP and ECN fields before ensuring that the packet contains a complete inner header; with DSCP copying enabled, it can also write beyond packet data. A configured IPv6 tunnel endpoint is required, and repeated packets can cause traffic drops or a kernel oops while exposing a limited stale-heap oracle.

CVSS severity8.6
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use of uninitialized data in affected Linux kernel versions allows remote attackers to crash the kernel via truncated IPv6 tunnel packets. The __ip6_tnl_rcv() path reads DSCP and ECN fields before ensuring that the packet contains a complete inner header; with DSCP copying enabled, it can also write beyond packet data. A configured IPv6 tunnel endpoint is required, and repeated packets can cause traffic drops or a kernel oops while exposing a limited stale-heap oracle.

The record

CVE
CVE-2024-26641
Published
Mar 18, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=0d3c703a9d1723c7707e0680019ac8ff5922db42 <350a6640fac4b53564ec20aa3f4a0922cb0ba5e6
  2. Affected versionversion=0d3c703a9d1723c7707e0680019ac8ff5922db42 <8d975c15c0cd744000ca386247432d57b21f9df0
  3. Affected versionversion=0d3c703a9d1723c7707e0680019ac8ff5922db42 <a9bc32879a08f23cdb80a48c738017e39aea1080
  4. Affected versionversion=0d3c703a9d1723c7707e0680019ac8ff5922db42 <af6b5c50d47ab43e5272ad61935d0ed2e264d3f0
  5. Affected versionversion=0d3c703a9d1723c7707e0680019ac8ff5922db42 <c835df3bcc14858ae9b27315dd7de76370b94f3a
  6. Affected versionversion=0d3c703a9d1723c7707e0680019ac8ff5922db42 <d54e4da98bbfa8c257bdca94c49652d81d18a4d8
  7. Affected versionversion=4.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0d3c703a9d1723c7707e0680019ac8ff5922db42 <350a6640fac4b53564ec20aa3f4a0922cb0ba5e6; version=0d3c703a9d1723c7707e0680019ac8ff5922db42 <8d975c15c0cd744000ca386247432d57b21f9df0; version=0d3c703a9d1723c7707e0680019ac8ff5922db42 <a9bc32879a08f23cdb80a48c738017e39aea1080; version=0d3c703a9d1723c7707e0680019ac8ff5922db42 <af6b5c50d47ab43e5272ad61935d0ed2e264d3f0; version=0d3c703a9d1723c7707e0680019ac8ff5922db42 <c835df3bcc14858ae9b27315dd7de76370b94f3a; version=0d3c703a9d1723c7707e0680019ac8ff5922db42 <d54e4da98bbfa8c257bdca94c49652d81d18a4d8; version=4.7

Published CVSS scores

8.6Linux kernel CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
5.5NIST NVDCVSS: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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
T1499.004Application or System Exploitation

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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