Local code execution via oversized language subtag
Published May 27, 2025 · Updated Aug 31, 2026
Stack buffer overflow in ICU before 78.1 allows local users to execute arbitrary code by supplying crafted input to the genrb utility. SRBRoot::addTag copies an oversized language subtag into the fixed-size subtag member without enforcing its capacity, corrupting stack memory. Execution requires a user to run genrb on attacker-controlled resource-bundle data; successful exploitation runs code with that user's privileges.
Summary
What happened
Stack buffer overflow in ICU before 78.1 allows local users to execute arbitrary code by supplying crafted input to the genrb utility. SRBRoot::addTag copies an oversized language subtag into the fixed-size subtag member without enforcing its capacity, corrupting stack memory. Execution requires a user to run genrb on attacker-controlled resource-bundle data; successful exploitation runs code with that user's privileges.
The record
- CVE
- CVE-2025-5222
- Published
- May 27, 2025
- Updated
- Aug 31, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat OpenShift Container Platform 4.16
- Classifications
- CWE-120, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 27, 2025CVE publishedPublication date reported by the CVE source.
- Aug 31, 2026Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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