Low severity2.5NVD Advisory· Published Feb 24, 2021· Updated Jun 17, 2026
CVE-2021-27645
CVE-2021-27645
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
15cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
- GNU/GNU C Librarydescription
- osv-coords7 versionspkg:rpm/almalinux/compat-libpthread-nonsharedpkg:rpm/almalinux/glibc-benchtestspkg:rpm/almalinux/glibc-nss-develpkg:rpm/almalinux/glibc-staticpkg:rpm/almalinux/glibc-utilspkg:rpm/almalinux/nss_hesiodpkg:rpm/opensuse/glibc&distro=openSUSE%20Tumbleweed
< 2.28-164.el8+ 6 more
- (no CPE)range: < 2.28-164.el8
- (no CPE)range: < 2.28-164.el8
- (no CPE)range: < 2.28-164.el8
- (no CPE)range: < 2.28-164.el8
- (no CPE)range: < 2.28-164.el8
- (no CPE)range: < 2.28-164.el8
- (no CPE)range: < 2.34-1.2
Patches
Vulnerability mechanics
References
5- sourceware.org/bugzilla/show_bug.cginvdIssue TrackingPatchThird Party Advisory
- lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202107-07nvdThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/nvd
News mentions
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