Unrated severityNVD Advisory· Published Feb 24, 2021· Updated Jun 9, 2025
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.
Affected products
8- 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
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
5- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/mitrevendor-advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/mitrevendor-advisory
- security.gentoo.org/glsa/202107-07mitrevendor-advisory
- lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlmitremailing-list
- sourceware.org/bugzilla/show_bug.cgimitre
News mentions
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