Service hang via unbroken OOM task traversal
Published Feb 27, 2025 · Updated Sep 8, 2026
Denial of service in the Linux kernel memcg OOM path allows local users to cause a soft lockup by filling an OOM cgroup with tasks. The mem_cgroup_scan_tasks function traverses every task without yielding, so a cgroup containing tens of thousands of tasks monopolizes CPU time during OOM handling. Local access and a heavily populated OOM cgroup are required; the bounded consequence is a kernel soft lockup and service hang.
Summary
What happened
Denial of service in the Linux kernel memcg OOM path allows local users to cause a soft lockup by filling an OOM cgroup with tasks. The mem_cgroup_scan_tasks function traverses every task without yielding, so a cgroup containing tens of thousands of tasks monopolizes CPU time during OOM handling. Local access and a heavily populated OOM cgroup are required; the bounded consequence is a kernel soft lockup and service hang.
The record
- CVE
- CVE-2024-57977
- Published
- Feb 27, 2025
- Updated
- Sep 8, 2026
- Vendor
- Siemens
- Product
- SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
- Classifications
- CWE-667, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 27, 2025CVE publishedPublication date reported by the CVE source.
- Sep 8, 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=V3.1.5 <*
- Affected versionversion=V3.1.6 <*
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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