Process interruption via freed awk temporary variable
Published May 18, 2022 · Updated Jul 7, 2026
Use-after-free in BusyBox 1.35.0 awk allows local users to interrupt the invoking process with a crafted awk pattern. The OC_MOVE path in evaluate() lets copyvar retain a temporary-variable reference, then returns that reference after the temporary storage is freed. The awk applet must be enabled and process attacker-controlled script text; public evidence does not demonstrate the reported code-execution impact.
Summary
What happened
Use-after-free in BusyBox 1.35.0 awk allows local users to interrupt the invoking process with a crafted awk pattern. The OC_MOVE path in evaluate() lets copyvar retain a temporary-variable reference, then returns that reference after the temporary storage is freed. The awk applet must be enabled and process attacker-controlled script text; public evidence does not demonstrate the reported code-execution impact.
The record
- CVE
- CVE-2022-30065
- Published
- May 18, 2022
- Updated
- Jul 7, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-416, T1204
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 18, 2022CVE publishedPublication date reported by the CVE source.
- Jul 7, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
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.
Public exploit references
- BusyBox awk crafted-pattern test caseproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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