Double Free in Gnu Glibc
CVE-2021-27645
The nameserver caching daemon (nscd) in the GNU C Library (aka glibc or libc6) 2.29 through 2.33, when processing a request for netgroup lookup, may crash due to a double-free, potentially resulting in degraded service or Denial of Service on the local system. This is related to netgroupcache.c.
Vulnerability class: Double Free
EPSS: 0.004 (30.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 2.5 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Gnu Glibc
- Debian Debian_linux — versions 10.0
- Fedoraproject Fedora — versions 33, 34
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Patch, Third Party Advisory, Issue Tracking)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory)
- cve@mitre.org (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-27645?
- CVE-2021-27645 is a low-severity vulnerability in Gnu Glibc, classified under Double Free. CVSS score: 2.5/10. Published 2021-02-24.
- How severe is CVE-2021-27645?
- Low severity. CVSS v3 base score is 2.5 out of 10.
- Is CVE-2021-27645 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.