CVE-2022-23901
CVE-2022-23901 is a critical-severity vulnerability in Re2c with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 2% (72nd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Re2c
- Published:
- Last modified:
Description
A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.
Frequently asked questions
- What is CVE-2022-23901?
- A stack overflow re2c 2.2 exists due to infinite recursion issues in src/dfa/dead_rules.cc.
- How severe is CVE-2022-23901?
- CVE-2022-23901 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2022-23901 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-23901?
- CVE-2022-23901 affects Re2c. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2022-23901?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2022-23901 published?
- CVE-2022-23901 was published on 2022-03-29 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:re2c:re2c:2.2:*:*:*:*:*:*:*
More vulnerabilities in Re2c
- CVE-2020-11958 — High (CVSS 7.8): re2c 1.3 has a heap-based buffer overflow in Scanner::fill in parse/scanner.cc via a long lexeme.
- CVE-2018-21232 — Medium (CVSS 5.5): re2c before 2.0 has uncontrolled recursion that causes stack consumption in find_fixed_tags.
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