Kernel memory corruption via stale WireGuard peer iteration
Published May 1, 2024 · Updated Aug 5, 2026
Use-after-free in Linux WireGuard netlink handling from 5.6 allows local users to corrupt kernel memory through concurrent peer requests. A resumed WireGuard device dump follows a removed peer into a temporary stack list, iterates freed peers, and accesses reclaimed objects instead of checking the peer's is_dead flag. A local user can gain the required namespace capability without victim interaction, exposing kernel data, enabling kernel-memory writes, or crashing or hanging the system.
Summary
What happened
Use-after-free in Linux WireGuard netlink handling from 5.6 allows local users to corrupt kernel memory through concurrent peer requests. A resumed WireGuard device dump follows a removed peer into a temporary stack list, iterates freed peers, and accesses reclaimed objects instead of checking the peer's is_dead flag. A local user can gain the required namespace capability without victim interaction, exposing kernel data, enabling kernel-memory writes, or crashing or hanging the system.
The record
- CVE
- CVE-2024-26951
- Published
- May 1, 2024
- Updated
- Aug 5, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 1, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=0 <*
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What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
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Your stack
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