Local service interruption via IPC initialization leak
Published Sep 15, 2025 · Updated Sep 15, 2025
A memory leak in the Linux kernel IPC subsystem allows local users to interrupt service through failed message-queue initialization. When setup_mq_sysctls() fails in init_mqueue_fs(), the error path returns without releasing mqueue_inode_cachep, retaining the inode cache allocation. Exploitation requires low-privileged local access and the sysctl-registration failure path; the documented impact is availability loss, not data access or modification.
Summary
What happened
A memory leak in the Linux kernel IPC subsystem allows local users to interrupt service through failed message-queue initialization. When setup_mq_sysctls() fails in init_mqueue_fs(), the error path returns without releasing mqueue_inode_cachep, retaining the inode cache allocation. Exploitation requires low-privileged local access and the sysctl-registration failure path; the documented impact is availability loss, not data access or modification.
The record
- CVE
- CVE-2022-50284
- Published
- Sep 15, 2025
- Updated
- Sep 15, 2025
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-401, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 15, 2025CVE publishedPublication date reported by the CVE source.
- Sep 15, 2025Record 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=5.19
- Affected versionversion=dc55e35f9e810f23dd69cfdc91a3d636023f57a2 <12b677f2c697d61e5ddbcb6c1650050a39392f54
- Affected versionversion=dc55e35f9e810f23dd69cfdc91a3d636023f57a2 <28dad915abe46d38c5799a0c8130e9a2a1540385
- Affected versionversion=dc55e35f9e810f23dd69cfdc91a3d636023f57a2 <86273624a68d07f129dc182b8394f487ed4de484
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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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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