Kernel crash via recursive IPv6 dump destructor
Published May 19, 2024 · Updated May 12, 2026
Denial of service in Linux IPv6 route dumping allows local users to crash affected systems through netlink socket teardown. The fib6_dump_done() destructor restores its own callback after an allocation failure, then calls itself until the kernel stack guard page is hit. Reachability requires an IPv6 netlink route dump to encounter that allocation-failure path before socket teardown; the demonstrated consequence is a kernel crash.
Summary
What happened
Denial of service in Linux IPv6 route dumping allows local users to crash affected systems through netlink socket teardown. The fib6_dump_done() destructor restores its own callback after an allocation failure, then calls itself until the kernel stack guard page is hit. Reachability requires an IPv6 netlink route dump to encounter that allocation-failure path before socket teardown; the demonstrated consequence is a kernel crash.
The record
- CVE
- CVE-2024-35886
- Published
- May 19, 2024
- Updated
- May 12, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-674, CWE-787, CWE-835, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 19, 2024CVE publishedPublication date reported by the CVE source.
- May 12, 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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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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