Service interruption via sleeping lock under RCU
Published Aug 17, 2024 · Updated May 23, 2026
Improper locking in Linux kernel XDP page-pool teardown allows local users to trigger an invalid wait context and interrupt service. xdp_unreg_mem_model calls page_pool_destroy under rcu_read_lock, while mem_allocator_disconnect attempts to acquire a sleeping mutex. Reachability requires an affected page-pool driver using XDP and the page_pool_destroy-then-unregister teardown sequence.
Summary
What happened
Improper locking in Linux kernel XDP page-pool teardown allows local users to trigger an invalid wait context and interrupt service. xdp_unreg_mem_model calls page_pool_destroy under rcu_read_lock, while mem_allocator_disconnect attempts to acquire a sleeping mutex. Reachability requires an affected page-pool driver using XDP and the page_pool_destroy-then-unregister teardown sequence.
The record
- CVE
- CVE-2024-43834
- Published
- Aug 17, 2024
- Updated
- May 23, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 17, 2024CVE publishedPublication date reported by the CVE source.
- May 23, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=0 <*
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Published CVSS scores
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Technologies
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