CVE-2018-20796

HIGHNVD 7.5

7.5

In the GNU C Library (aka glibc or libc6) through 2.29, check_dst_limits_calc_pos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\227|)(\\1\\1|t1|\\\2537)+' in grep.

CVSS v3: 7.5
EG Score: —
EPSS: 81.3%
KEV: Not listed

Published

February 26, 2019

Last Modified

November 21, 2024

References (10)

cve@mitrehttp://www.securityfocus.com/bid/107160
cve@mitrehttps://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141
cve@mitrehttps://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.html
cve@mitrehttps://security.netapp.com/advisory/ntap-20190315-0002/
cve@mitrehttps://support.f5.com/csp/article/K26346590?utm_source=f5support&amp%3Butm_medium=RSS
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/107160
af854a3a-2127-422b-91ae-364da2661108https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141
af854a3a-2127-422b-91ae-364da2661108https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.html
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20190315-0002/
af854a3a-2127-422b-91ae-364da2661108https://support.f5.com/csp/article/K26346590?utm_source=f5support&amp%3Butm_medium=RSS

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-674Uncontrolled Recursion

Data Freshness Timeline

(refreshed 6× in last 7d / 6× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2018-20796?

CVE-2018-20796 is a high vulnerability published on February 26, 2019. In the GNU C Library (aka glibc or libc6) through 2.29, checkdstlimitscalcpos_1 in posix/regexec.c has Uncontrolled Recursion, as demonstrated by '(\227|)(\\1\\1|t1|\\\2537)+' in grep.

When was CVE-2018-20796 disclosed?

CVE-2018-20796 was first published in the National Vulnerability Database on February 26, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-20796 actively exploited?

CVE-2018-20796 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 81.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-20796?

CVE-2018-20796 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2018-20796?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-20796, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-20796

Explore →

Is Your Infrastructure Affected by CVE-2018-20796?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs

CVE-2018-20796

📅 Published

🔄 Last Modified

🔗 References (10)