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CVE-2018-20796 GNU glibc

Affected softwareGNU glibc
Severity7.5 High CVSS 3.0 2 scores
WeaknessCWE-674
Published26 Feb 2019
Updated17 Jun 2026

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.

Exploitation status

No public exploit

No exploit has been reported in the sources we check. Published 7 years ago.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment no assessment published
  • Indexed PoC none indexed
  • EPSS 5.8% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review human Researcher
  • Record active
Decided by Manual classification of this CVE in the legacy dataset
Finding A manual classification set this CVE's status to Outside Waratek scope, but the CVE names a tracked product.

CVSS

7.5 HIGH v3.0 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 3.0 7.5 HIGH CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H NVD Primary published
CVSS 2.0 5.0 none AV:N/AC:L/Au:N/C:N/I:N/A:P NVD Primary

Affected software and releases

Products and versions

4 products, 4 version entries
SourceVendorProductSchemeAffected versions
nvd gnu glibc generic ≤ 2.29
nvd netapp cloud backup generic any version
nvd netapp ontap select deploy administration utility generic any version
nvd netapp steelstore cloud integrated storage generic any version

References

URLTags
http://www.securityfocus.com/bid/107160 Third Party Advisory, VDB Entry
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=34141 Exploit, Mailing List, Vendor Advisory
https://lists.gnu.org/archive/html/bug-gnulib/2019-01/msg00108.html Exploit, 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

Published2019-02-26By the CVE Program.
NVD record modified2026-06-17NVD's own last-modified date for this record.