CVE-2024-26663

Local kernel crash via TIPC bearer type confusion

Published Apr 2, 2024 · Updated Aug 5, 2026

Type confusion in TIPC in affected Linux kernels allows local users to crash the kernel through a crafted generic-netlink message. tipc_nl_bearer_add passes UDP options to tipc_udp_nl_bearer_add for a non-UDP bearer, causing tipc_udp_is_known_peer to interpret media_ptr as the wrong object type. A low-privileged local user can reach the path through a network namespace; successful triggering causes a kernel protection fault and system interruption.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Type confusion in TIPC in affected Linux kernels allows local users to crash the kernel through a crafted generic-netlink message. tipc_nl_bearer_add passes UDP options to tipc_udp_nl_bearer_add for a non-UDP bearer, causing tipc_udp_is_known_peer to interpret media_ptr as the wrong object type. A low-privileged local user can reach the path through a network namespace; successful triggering causes a kernel protection fault and system interruption.

The record

CVE
CVE-2024-26663
Published
Apr 2, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 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=4.9
  2. Affected versionversion=ef20cd4dd1633987bcf46ac34ace2c8af212361f <0cd331dfd6023640c9669d0592bc0fd491205f87
  3. Affected versionversion=ef20cd4dd1633987bcf46ac34ace2c8af212361f <19d7314f2fb9515bdaac9829d4d8eb34edd1fe95
  4. Affected versionversion=ef20cd4dd1633987bcf46ac34ace2c8af212361f <24ec8f0da93b8a9fba11600be8a90f0d73fb46f1
  5. Affected versionversion=ef20cd4dd1633987bcf46ac34ace2c8af212361f <3871aa01e1a779d866fa9dfdd5a836f342f4eb87
  6. Affected versionversion=ef20cd4dd1633987bcf46ac34ace2c8af212361f <3d3a5b31b43515b5752ff282702ca546ec3e48b6
  7. Affected versionversion=ef20cd4dd1633987bcf46ac34ace2c8af212361f <6f70f0b412458c622a12d4292782c8e92e210c2f
  8. Affected versionversion=ef20cd4dd1633987bcf46ac34ace2c8af212361f <888e3524be87f3df9fa3c083484e4b62b3e3bb59
  9. Affected versionversion=ef20cd4dd1633987bcf46ac34ace2c8af212361f <c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.9; version=ef20cd4dd1633987bcf46ac34ace2c8af212361f <0cd331dfd6023640c9669d0592bc0fd491205f87; version=ef20cd4dd1633987bcf46ac34ace2c8af212361f <19d7314f2fb9515bdaac9829d4d8eb34edd1fe95; version=ef20cd4dd1633987bcf46ac34ace2c8af212361f <24ec8f0da93b8a9fba11600be8a90f0d73fb46f1; version=ef20cd4dd1633987bcf46ac34ace2c8af212361f <3871aa01e1a779d866fa9dfdd5a836f342f4eb87; version=ef20cd4dd1633987bcf46ac34ace2c8af212361f <3d3a5b31b43515b5752ff282702ca546ec3e48b6; version=ef20cd4dd1633987bcf46ac34ace2c8af212361f <6f70f0b412458c622a12d4292782c8e92e210c2f; version=ef20cd4dd1633987bcf46ac34ace2c8af212361f <888e3524be87f3df9fa3c083484e4b62b3e3bb59; version=ef20cd4dd1633987bcf46ac34ace2c8af212361f <c1701ea85ef0ec7be6a1b36c7da69f572ed2fd12

Published CVSS scores

7.8Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5OracleCVSS: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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo