Local system crash via IPv6 anycast teardown race
Published Jun 25, 2026 · Updated Jun 25, 2026
Use-after-free in the Linux Kernel allows local users to crash the system through an IPv6 anycast address teardown race. __ipv6_dev_ac_inc() publishes an anycast-address object to the device list before adding it to the global hash, allowing concurrent teardown to miss the hash entry and free an object that remains linked. When a later IPv6 path walks the dangling hash node after slab reuse, the kernel reads freed memory; reaching the race requires local low-privilege access and no user interaction.
Summary
What happened
Use-after-free in the Linux Kernel allows local users to crash the system through an IPv6 anycast address teardown race. __ipv6_dev_ac_inc() publishes an anycast-address object to the device list before adding it to the global hash, allowing concurrent teardown to miss the hash entry and free an object that remains linked. When a later IPv6 path walks the dangling hash node after slab reuse, the kernel reads freed memory; reaching the race requires local low-privilege access and no user interaction.
The record
- CVE
- CVE-2026-53259
- Published
- Jun 25, 2026
- Updated
- Jun 25, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-416, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 25, 2026CVE publishedPublication date reported by the CVE source.
- Jun 25, 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.
- Affected versionversion=6.17
- Affected versionversion=eb1ac9ff6c4a5720b1a1476233be374c5dc44bff <15be7e9fdbff831fb3e89b83cc337a4f85ad3310
- Affected versionversion=eb1ac9ff6c4a5720b1a1476233be374c5dc44bff <3a967c498baa976b11d4800dda224c507416e97c
- Affected versionversion=eb1ac9ff6c4a5720b1a1476233be374c5dc44bff <f723ccaff2fb72b71ae8a9fd283f0dee4d9ae7a3
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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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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