Arbitrary code execution via libresolv integer overflow
Published May 26, 2022 · Updated May 30, 2025
Integer overflow in Apple libresolv before macOS Monterey 12.4 allows remote attackers arbitrary code execution or application termination. The libresolv parser performs unsafe arithmetic on attacker-controlled network data, allowing the calculation to wrap and corrupt subsequent processing. Exploitation requires delivery of crafted resolver input to a vulnerable Apple system; consequences range from unexpected application termination to arbitrary code execution, while Apple does not publish a benign active-state indicator.
Summary
What happened
Integer overflow in Apple libresolv before macOS Monterey 12.4 allows remote attackers arbitrary code execution or application termination. The libresolv parser performs unsafe arithmetic on attacker-controlled network data, allowing the calculation to wrap and corrupt subsequent processing. Exploitation requires delivery of crafted resolver input to a vulnerable Apple system; consequences range from unexpected application termination to arbitrary code execution, while Apple does not publish a benign active-state indicator.
The record
- CVE
- CVE-2022-26775
- Published
- May 26, 2022
- Updated
- May 30, 2025
- Vendor
- Apple
- Product
- Security Update Catalina
- Classifications
- CWE-190, T1203
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 26, 2022CVE publishedPublication date reported by the CVE source.
- May 30, 2025Record 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=unspecified <2022
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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