Denial of service via regex memory amplification
Published Oct 14, 2022 · Updated Feb 13, 2025
Denial of service in Go regexp/syntax before 1.18.7 or 1.19.2 allows attackers to exhaust memory via crafted regular expressions. The regexp/syntax parser expands certain compact expressions by a very large constant factor, so relatively small untrusted patterns consume excessive memory during parsing. Exploitation requires a program to compile attacker-controlled expressions and can cause memory exhaustion or service interruption; normal expressions remain unaffected.
Summary
What happened
Denial of service in Go regexp/syntax before 1.18.7 or 1.19.2 allows attackers to exhaust memory via crafted regular expressions. The regexp/syntax parser expands certain compact expressions by a very large constant factor, so relatively small untrusted patterns consume excessive memory during parsing. Exploitation requires a program to compile attacker-controlled expressions and can cause memory exhaustion or service interruption; normal expressions remain unaffected.
The record
- CVE
- CVE-2022-41715
- Published
- Oct 14, 2022
- Updated
- Feb 13, 2025
- Vendor
- Go standard library
- Product
- regexp/syntax
- Classifications
- T1499.003
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 14, 2022CVE publishedPublication date reported by the CVE source.
- Feb 13, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.18.7
- Affected versionversion=1.19.0-0 <1.19.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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