CVE-2018-20796

Name: CVE-2018-20796
Creator: NVD / NIST
Published: 2019-02-26T02:29:00.45+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 5.80%

Last modified Jun 17, 2026

CVE-2018-20796 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 5.80% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

5.80%

92.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-674

Affected Software

Vendor	Product	Versions
Gnu	Glibc	<= 2.29
Netapp	Cloud Backup	All versions
Netapp	Ontap Select Deploy Administration Utility	All versions
Netapp	Steelstore Cloud Integrated Storage	All versions

References

http://www.securityfocus.com/bid/107160Third Party Advisory, VDB Entry
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141Exploit, Mailing List, Vendor Advisory
https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.htmlExploit, Mailing List, Vendor Advisory
https://security.netapp.com/advisory/ntap-20190315-0002/Patch, Third Party Advisory
https://support.f5.com/csp/article/K26346590?utm_source=f5support&amp%3Butm_medium=RSS
http://www.securityfocus.com/bid/107160Third Party Advisory, VDB Entry
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141Exploit, Mailing List, Vendor Advisory
https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.htmlExploit, Mailing List, Vendor Advisory
https://security.netapp.com/advisory/ntap-20190315-0002/Patch, Third Party Advisory
https://support.f5.com/csp/article/K26346590?utm_source=f5support&amp%3Butm_medium=RSS

Timeline

Published: Feb 26, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20796?

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.

How severe is CVE-2018-20796?

Severity scoring for CVE-2018-20796 is pending analysis. The EPSS model estimates a 5.80% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20796?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-20796?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST