Container credential spoofing via rseq abort-handler hijack
Published Jul 28, 2026 · Updated Jul 28, 2026
Improper privilege management in CRIU on affected Red Hat platforms allows local users to spoof container credentials during checkpoint/restore. A crafted rseq critical section redirects injected parasite execution to an attacker-controlled abort handler that patches dump_creds to save zero UIDs/GIDs and full capabilities. Exploitation requires control of code inside a container plus administrator-enabled checkpoint/restore; namespaces, SELinux, seccomp, and kernel checks confine or block host escalation.
Summary
What happened
Improper privilege management in CRIU on affected Red Hat platforms allows local users to spoof container credentials during checkpoint/restore. A crafted rseq critical section redirects injected parasite execution to an attacker-controlled abort handler that patches dump_creds to save zero UIDs/GIDs and full capabilities. Exploitation requires control of code inside a container plus administrator-enabled checkpoint/restore; namespaces, SELinux, seccomp, and kernel checks confine or block host escalation.
The record
- CVE
- CVE-2026-18107
- Published
- Jul 28, 2026
- Updated
- Jul 28, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Enterprise Linux 10
- Classifications
- CWE-269, T1068
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Jul 28, 2026CVE publishedPublication date reported by the CVE source.
- Jul 28, 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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