UpHeron
All vulnerabilities

Servers and applications

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.

Severity
High 7.5
Published
26 Feb 2019
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
5.8% in the next 30 daysHigher than 93% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness
Uncontrolled recursion (CWE-674)
Attack
Over the network · No login needed · No user action needed
Attacker can
Take it down
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
GNU C LibraryServers and applications · cpe:a:gnu:glibc
  • Every version up to 2.29

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-20796
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-20796