CVE-2024-26950

Kernel crash and memory access via freed peer

Published May 1, 2024 · Updated Aug 5, 2026

Use-after-free in Linux WireGuard netlink allows local users to crash the kernel or read and alter kernel memory through netlink. A partially drained device dump retains a peer cursor that can be freed when peers are replaced; resuming the dump dereferences peer->device and accesses reclaimed slab data. The sequence requires low-privileged local access and CAP_NET_ADMIN obtainable in a user namespace, with consequences bounded to the affected kernel.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux WireGuard netlink allows local users to crash the kernel or read and alter kernel memory through netlink. A partially drained device dump retains a peer cursor that can be freed when peers are replaced; resuming the dump dereferences peer->device and accesses reclaimed slab data. The sequence requires low-privileged local access and CAP_NET_ADMIN obtainable in a user namespace, with consequences bounded to the affected kernel.

The record

CVE
CVE-2024-26950
Published
May 1, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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

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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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=5.6; version=e7096c131e5161fa3b8e52a650d7719d2857adfd <09c3fa70f65175861ca948cb2f0f791e666c90e5; version=e7096c131e5161fa3b8e52a650d7719d2857adfd <493aa6bdcffd90a4f82aa614fe4f4db0641b4068; version=e7096c131e5161fa3b8e52a650d7719d2857adfd <4be453271a882c8ebc28df3dbf9e4d95e6ac42f5; version=e7096c131e5161fa3b8e52a650d7719d2857adfd <71cbd32e3db82ea4a74e3ef9aeeaa6971969c86f; version=e7096c131e5161fa3b8e52a650d7719d2857adfd <93bcc1752c69bb309f4d8cfaf960ef1faeb34996; version=e7096c131e5161fa3b8e52a650d7719d2857adfd <c991567e6c638079304cc15dff28748e4a3c4a37; version=e7096c131e5161fa3b8e52a650d7719d2857adfd <d44bd323d8bb8031eef4bdc44547925998a11e47

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CVE teamCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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

T1068Exploitation for Privilege Escalation

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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