Vulnerability record · CVE-2018-20796 · published 26 February 2019

CVE-2018-20796: Gnu glibc vulnerability

Gnu · Glibc

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.

7.5 CVSS 3.0 High EPSS 5.8% · top 7.2% CWE-674 · CWE-674

7.5CVSS 3.0 base score, v2 5.0

5.8%EPSS exploitation probability, 30 days

NoNot in CISA KEV

4Affected product versions listed by NVD

10References, 4 tagged exploit

17 Jun 2026Last modified by NVD

Description

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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Glibc Gnu NCloud Backup Netapp NOntap Select Deploy Administration Utility Netapp NSteelstore Cloud Integrated Storage Netapp

References

Link	Tags
http://www.securityfocus.com/bid/107160	Third Party AdvisoryVDB Entry
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141	ExploitMailing ListVendor Advisory
https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.html	ExploitMailing ListVendor Advisory
https://security.netapp.com/advisory/ntap-20190315-0002/	PatchThird Party Advisory
https://support.f5.com/csp/article/K26346590?utm_source=f5support&amp%3Butm_medium=RSS
http://www.securityfocus.com/bid/107160	Third Party AdvisoryVDB Entry
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141	ExploitMailing ListVendor Advisory
https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.html	ExploitMailing ListVendor Advisory
https://security.netapp.com/advisory/ntap-20190315-0002/	PatchThird Party Advisory
https://support.f5.com/csp/article/K26346590?utm_source=f5support&amp%3Butm_medium=RSS

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Source: NIST National Vulnerability Database (record CVE-2018-20796), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.