Traffic-processing hang via recursive qdisc locking
Published May 1, 2024 · Updated Sep 2, 2026
Deadlock in Linux allows local users to hang traffic processing by recursively mirroring packets through a classful egress qdisc. When the mirred action redirects a packet back to the same root qdisc, __dev_queue_xmit reacquires sch->q.lock while that lock is held, causing recursive locking. Reaching the flaw requires traffic-control administration privileges and a self-referential or cyclic mirred configuration; the resulting hang affects traffic traversing that qdisc.
Summary
What happened
Deadlock in Linux allows local users to hang traffic processing by recursively mirroring packets through a classful egress qdisc. When the mirred action redirects a packet back to the same root qdisc, __dev_queue_xmit reacquires sch->q.lock while that lock is held, causing recursive locking. Reaching the flaw requires traffic-control administration privileges and a self-referential or cyclic mirred configuration; the resulting hang affects traffic traversing that qdisc.
The record
- CVE
- CVE-2024-27010
- Published
- May 1, 2024
- Updated
- Sep 2, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-667, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 1, 2024CVE publishedPublication date reported by the CVE source.
- Sep 2, 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?
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- Affected versionversion=4.2
- Affected versionversion=e578d9c02587d57bfa7b560767c698a668a468c6 <0f022d32c3eca477fbf79a205243a6123ed0fe11
- Affected versionversion=e578d9c02587d57bfa7b560767c698a668a468c6 <524323f52cbfbac4fe3f8a33a8cc405fafba0d33
- Affected versionversion=e578d9c02587d57bfa7b560767c698a668a468c6 <e6b90468da4dae2281a6e381107f411efb48b0ef
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
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Technologies
Your stack
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Your stack
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