Kernel heap corruption via double copyin race
Published Jul 16, 2026 · Updated Jul 16, 2026
Heap-based buffer overflow in the dld driver in illumos-gate, OmniOS, and SmartOS allows local users to corrupt kernel memory. drv_ioc_prop_common() allocates from pr_valsize copied once, then recopies the mutable header and payload, so a concurrent size increase overruns the heap buffer. Access to /dev/dld is required; a local user, including one in a non-global zone that owns a datalink, can panic the host, while privilege escalation remains undocumented.
Summary
What happened
Heap-based buffer overflow in the dld driver in illumos-gate, OmniOS, and SmartOS allows local users to corrupt kernel memory. drv_ioc_prop_common() allocates from pr_valsize copied once, then recopies the mutable header and payload, so a concurrent size increase overruns the heap buffer. Access to /dev/dld is required; a local user, including one in a non-global zone that owns a datalink, can panic the host, while privilege escalation remains undocumented.
The record
- CVE
- CVE-2026-15449
- Published
- Jul 16, 2026
- Updated
- Jul 16, 2026
- Vendor
- OmniOS Community Edition Association
- Product
- OmniOS
- Classifications
- CWE-122, CWE-367, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 16, 2026CVE publishedPublication date reported by the CVE source.
- Jul 16, 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=any <r151054
- Affected versionversion=r151054 <r151054bj changes=[{"at":"r151054bj","status":"unaffected"}]
- Affected versionversion=r151056 <r151056aj changes=[{"at":"r151056aj","status":"unaffected"}]
- Affected versionversion=r151058 <r151058j changes=[{"at":"r151058j","status":"unaffected"}]
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What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
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Technologies
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Your stack
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