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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.80%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 5.80% probability · 93th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-674
- Affected
- gnu/glibc · netapp/cloud backup · netapp/ontap select deploy administration utility · netapp/steelstore cloud integrated storage
- Source
- cve@mitre.org
EPSS 5.8% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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&%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&%3Butm_medium=RSS
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.