Service hang via userns symlink traversal
Published Oct 15, 2024 · Updated Apr 24, 2026
Path traversal in containers/storage before 1.55.1 allows remote authenticated users to hang container engines through a malicious image. The parseMountedFiles function joined the container mount with /etc/passwd and /etc/group, then followed symlinks outside the mount while sizing an automatic user namespace. Exploitation requires permission to run an attacker-controlled image with automatic user-namespace allocation and can exhaust memory until the engine is killed.
Summary
What happened
Path traversal in containers/storage before 1.55.1 allows remote authenticated users to hang container engines through a malicious image. The parseMountedFiles function joined the container mount with /etc/passwd and /etc/group, then followed symlinks outside the mount while sizing an automatic user namespace. Exploitation requires permission to run an attacker-controlled image with automatic user-namespace allocation and can exhaust memory until the engine is killed.
The record
- CVE
- CVE-2024-9676
- Published
- Oct 15, 2024
- Updated
- Apr 24, 2026
- Vendor
- Red Hat
- Product
- Red Hat Enterprise Linux 10
- Classifications
- CWE-22, T1499.004
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 15, 2024CVE publishedPublication date reported by the CVE source.
- Apr 24, 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?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
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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