Local system hang via uncanceled io-wq reads
Published Feb 14, 2026 · Updated Feb 14, 2026
Denial of service in the Linux kernel io-wq subsystem allows local users to delay process exit through queued large /dev/msr reads. io_worker_handle_work() checks IO_WQ_BIT_EXIT only before its work loop, so loop_rw_iter() continues processing a queued chain instead of canceling remaining reads after exit begins. Exploitation requires local low-privileged access and enough queued work; the bounded consequence is prolonged uninterruptible sleep and an io-wq exit hang.
Summary
What happened
Denial of service in the Linux kernel io-wq subsystem allows local users to delay process exit through queued large /dev/msr reads. io_worker_handle_work() checks IO_WQ_BIT_EXIT only before its work loop, so loop_rw_iter() continues processing a queued chain instead of canceling remaining reads after exit begins. Exploitation requires local low-privileged access and enough queued work; the bounded consequence is prolonged uninterruptible sleep and an io-wq exit hang.
The record
- CVE
- CVE-2026-23113
- Published
- Feb 14, 2026
- Updated
- Feb 14, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 14, 2026CVE publishedPublication date reported by the CVE source.
- Feb 14, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <10dc959398175736e495f71c771f8641e1ca1907
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2e8ca1078b14142db2ce51cbd18ff9971560046b
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <85eb83694a91c89d9abe615d717c0053c3efa714
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <bdf0bf73006ea8af9327cdb85cfdff4c23a5f966
What conditions does exploitation require?
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
Your stack
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Your stack
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