Local privilege escalation via unchecked udmabuf page offset
Published Apr 14, 2023 · Updated Aug 10, 2026
Out-of-bounds access in Linux kernel udmabuf before 5.19 allows local users with high privileges to execute code in kernel context. The udmabuf_vm_fault handler used vmf->pgoff to index ubuf->pages without first confirming that the offset was below ubuf->pagecount. Exploitation requires local high-privileged code execution and can yield arbitrary code execution in kernel context.
Summary
What happened
Out-of-bounds access in Linux kernel udmabuf before 5.19 allows local users with high privileges to execute code in kernel context. The udmabuf_vm_fault handler used vmf->pgoff to index ubuf->pages without first confirming that the offset was below ubuf->pagecount. Exploitation requires local high-privileged code execution and can yield arbitrary code execution in kernel context.
The record
- CVE
- CVE-2023-2008
- Published
- Apr 14, 2023
- Updated
- Aug 10, 2026
- Vendor
- Red Hat
- Product
- Red Hat Enterprise Linux 9.0 Extended Update Support
- Classifications
- CWE-129, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Apr 14, 2023CVE publishedPublication date reported by the CVE source.
- Aug 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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