Updated 8 h ago

Vulnerability database

Every flaw the U.S. government’s cybersecurity agency (CISA) has confirmed attackers are using, plus the new WordPress plugin and theme bugs published each day, sorted by what they mean for a small business. We refresh it twice a day. If you see something your website or office runs, tell us.

1,762exploited flaws on CISA’s list

34added in the last 30 days

343new WordPress flaws this week

390,080entries in the database

16 results

Oct 9, 2026A missing release of resources in the illumos name service cache daemon (nscd) allows a local user to exhaust kernel memory.CVE-2026-104112 · Other software · illumos · reported by 0ca53633-f0b5-4853-ba72-e0a2e62000d0Medium 6.8
A missing release of resources in the illumos name service cache daemon (nscd) allows a local user to exhaust kernel memory. The nscd door server procedure, switcher() in usr/src/cmd/nscd/nscd_frontend.c, does not close file descriptors that are passed with a door call but not used by the request, and the main nscd door at /var/run/name_service_door accepts passed descriptors from any user in its zone. Because nscd also runs with an unlimited file descriptor limit, an unprivileged local user, including one in a non-global zone, can repeatedly pass a descriptor to its zone's nscd in a door_call() loop, causing the file descriptor table of nscd to grow without bound in kernel memory. This causes a denial of service of nscd and can render processes in all zones on the host unresponsive. The flaw has existed since 2006 (illumos-gate commit cb5caa98), and affects any illumos distribution prior to illumos-gate commit af810a72.
Product
illumos-gate
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record github.com illumos.org
Sep 10, 2026The nscd service in the GNU C Library 2.3.4 onwards may crash due to a stack overflow when a malicious DNS server returns too large a response for a DNS queryCVE-2026-89092 · Other software · The GNU C Library · reported by 3ff69d7a-14f2-4f67-a097-88dee7810d18Medium 4.2
The nscd service in the GNU C Library 2.3.4 onwards may crash due to a stack overflow when a malicious DNS server returns too large a response for a DNS query, resulting in degraded DNS resolution for the system. Exploitation of this bug needs a system that has nscd enabled and using an untrusted DNS server for name resolution, with the compromised DNS server being capable of processing records large enough to result in a stack overflow in an nscd thread stack. During experimentation, bind 9 was unable to handle large records, but that could change in future or with a different name server. In typical installations, nscd is executed in an isolated context as its own user without a shell, due to which any compromise of that service is isolated. There is a remote possibility of nscd cache corruption if an attacker manages to get the stack pointer into a desired point in the heap, potentially resulting in other caches in nscd being overwritten with corrupt data through the stack overflow, until the buggy code path eventually results in a crash. Finally, a crash in nscd may result in performance degradation when resolving names, but it does not result in a deni
Product
glibc
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record sourceware.org sourceware.org
Mar 11, 2026Calling NSS-backed functions that support caching via nscd may call the nscd client side code and in the GNU C Library version 2.36 under high load on x86_64 CVE-2026-3904 · Other software · The GNU C Library · reported by 3ff69d7a-14f2-4f67-a097-88dee7810d18Medium 6.2
Calling NSS-backed functions that support caching via nscd may call the nscd client side code and in the GNU C Library version 2.36 under high load on x86_64 systems, the client may call memcmp on inputs that are concurrently modified by other processes or threads and crash. The nscd client in the GNU C Library uses the memcmp function with inputs that may be concurrently modified by another thread, potentially resulting in spurious cache misses, which in itself is not a security issue. However in the GNU C Library version 2.36 an optimized implementation of memcmp was introduced for x86_64 which could crash when invoked with such undefined behaviour, turning this into a potential crash of the nscd client and the application that uses it. This implementation was backported to the 2.35 branch, making the nscd client in that branch vulnerable as well. Subsequently, the fix for this issue was backported to all vulnerable branches in the GNU C Library repository. It is advised that distributions that may have cherry-picked the memcpy SSE2 optimization in their copy of the GNU C Library, also apply the fix to avoid the potential crash in the nscd client.
Product
glibc
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record sourceware.org sourceware.org
May 6, 2024nscd: netgroup cache assumes NSS callback uses in-buffer strings The Name Service Cache Daemon's (nscd) netgroup cache can corrupt memory when the NSS callbackCVE-2024-33602 · Other software · The GNU C Library · reported by 3ff69d7a-14f2-4f67-a097-88dee7810d18High 7.4
nscd: netgroup cache assumes NSS callback uses in-buffer strings The Name Service Cache Daemon's (nscd) netgroup cache can corrupt memory when the NSS callback does not store all strings in the provided buffer. The flaw was introduced in glibc 2.15 when the cache was added to nscd. This vulnerability is only present in the nscd binary.
Product
glibc
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.debian.org
May 6, 2024nscd: netgroup cache may terminate daemon on memory allocation failure The Name Service Cache Daemon's (nscd) netgroup cache uses xmalloc or xrealloc and theseCVE-2024-33601 · Other software · The GNU C Library · reported by 3ff69d7a-14f2-4f67-a097-88dee7810d18High 7.3
nscd: netgroup cache may terminate daemon on memory allocation failure The Name Service Cache Daemon's (nscd) netgroup cache uses xmalloc or xrealloc and these functions may terminate the process due to a memory allocation failure resulting in a denial of service to the clients. The flaw was introduced in glibc 2.15 when the cache was added to nscd. This vulnerability is only present in the nscd binary.
Product
glibc
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.debian.org
May 6, 2024nscd: Null pointer crashes after notfound response If the Name Service Cache Daemon's (nscd) cache fails to add a not-found netgroup response to the cache, theCVE-2024-33600 · Other software · The GNU C Library · reported by 3ff69d7a-14f2-4f67-a097-88dee7810d18Medium 5.9
nscd: Null pointer crashes after notfound response If the Name Service Cache Daemon's (nscd) cache fails to add a not-found netgroup response to the cache, the client request can result in a null pointer dereference. This flaw was introduced in glibc 2.15 when the cache was added to nscd. This vulnerability is only present in the nscd binary.
Product
glibc
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.debian.org
May 6, 2024nscd: Stack-based buffer overflow in netgroup cache If the Name Service Cache Daemon's (nscd) fixed size cache is exhausted by client requests then a subsequenCVE-2024-33599 · Other software · The GNU C Library · reported by 3ff69d7a-14f2-4f67-a097-88dee7810d18High 8.1
nscd: Stack-based buffer overflow in netgroup cache If the Name Service Cache Daemon's (nscd) fixed size cache is exhausted by client requests then a subsequent client request for netgroup data may result in a stack-based buffer overflow. This flaw was introduced in glibc 2.15 when the cache was added to nscd. This vulnerability is only present in the nscd binary.
Product
glibc
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record openwall.com lists.debian.org
Feb 24, 2021The 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 tCVE-2021-27645 · Other software · Siemens · reported by MITRELow 2.5
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.
Product
SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record lists.debian.org lists.fedoraproject.org
Apr 10, 2019The nscd daemon in the GNU C Library (glibc) before version 2.5 does not close incoming client sockets if they cannot be handled by the daemon, allowing local uCVE-2006-7254 · Other software · GNU · reported by MITREMedium 5.5
The nscd daemon in the GNU C Library (glibc) before version 2.5 does not close incoming client sockets if they cannot be handled by the daemon, allowing local users to carry out a denial of service attack on the daemon.
Product
Glibc
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record sourceware.org sourceware.org
Jun 12, 2017nscd in the GNU C Library (aka glibc or libc6) before version 2.20 does not correctly compute the size of an internal buffer when processing netgroup requests, CVE-2014-9984 · Other software · GNU · reported by MITRECritical 9.8
nscd in the GNU C Library (aka glibc or libc6) before version 2.20 does not correctly compute the size of an internal buffer when processing netgroup requests, possibly leading to an nscd daemon crash or code execution as the user running nscd.
Product
Glibc
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record packetstormsecurity.com packetstormsecurity.com
Oct 21, 2015Unspecified vulnerability in Oracle Sun Solaris 11.2 allows local users to affect confidentiality, integrity, and availability via vectors related to NSCD.CVE-2015-4891 · Other software · Oracle · reported by secalert_us@oracle.comMedium 4.6
Unspecified vulnerability in Oracle Sun Solaris 11.2 allows local users to affect confidentiality, integrity, and availability via vectors related to NSCD.
Product
Solaris
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record oracle.com securitytracker.com
Jan 15, 2014Unspecified vulnerability in Oracle Solaris 10 and 11.1 allows local users to affect availability via vectors related to Name Service Cache Daemon (NSCD).CVE-2013-5872 · Other software · Oracle · reported by secalert_us@oracle.comLow 2.1
Unspecified vulnerability in Oracle Solaris 10 and 11.1 allows local users to affect availability via vectors related to Name Service Cache Daemon (NSCD).
Product
Sunos
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record osvdb.org secunia.com
Dec 22, 2008The name service cache daemon (nscd) in Sun Solaris 10 and OpenSolaris snv_50 through snv_104 does not properly check permissions, which allows local users to gCVE-2008-5699 · Other software · SUN · reported by MITREMedium 4.6
The name service cache daemon (nscd) in Sun Solaris 10 and OpenSolaris snv_50 through snv_104 does not properly check permissions, which allows local users to gain privileges and obtain sensitive information via unspecified vectors.
Product
Opensolaris
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record osvdb.org secunia.com
Jun 27, 2007The libsldap library in Sun Solaris 8, 9, and 10 allows local users to cause a denial of service (Name Service Caching Daemon (nscd) crash) via unspecified vectCVE-2007-3458 · Other software · SUN · reported by MITREMedium 4.9
The libsldap library in Sun Solaris 8, 9, and 10 allows local users to cause a denial of service (Name Service Caching Daemon (nscd) crash) via unspecified vectors.
Product
Solaris
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record osvdb.org secunia.com
Aug 12, 2002The default configuration of Name Service Cache Daemon (nscd) in Caldera OpenLinux 3.1 and 3.1.1 uses cached PTR records instead of consulting the authoritativeCVE-2002-0511 · Other software · Nscd · reported by MITREHigh 7.5
The default configuration of Name Service Cache Daemon (nscd) in Caldera OpenLinux 3.1 and 3.1.1 uses cached PTR records instead of consulting the authoritative DNS server for the A record, which could make it easier for remote attackers to bypass applications that restrict access based on host names.
Product
Nscd
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record calderasystems.com iss.net
Dec 11, 2000nss_ldap earlier than 121, when run with nscd (name service caching daemon), allows remote attackers to cause a denial of service via a flood of LDAP requests.CVE-2000-1045 · Other software · Padl Software · reported by MITRELow 1.2
nss_ldap earlier than 121, when run with nscd (name service caching daemon), allows remote attackers to cause a denial of service via a flood of LDAP requests.
Product
NSS Ldap
What to do
Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD record linux-mandrake.com redhat.com

Where this comes from: the exploited list is CISA’s Known Exploited Vulnerabilities catalog. Everything else is the whole National Vulnerability Database, where each record is published by the team that found the bug (Wordfence, Patchstack, WPScan, the vendors themselves and others); we show who. Exploit odds are FIRST’s EPSS, updated daily. Titles and categories are ours, so check the linked record before acting on a detail. For a write-up of the big ones, see our advisories. Every vendor, and every WordPress plugin and theme with a recorded flaw, also has its own page. All of it is free to reuse as JSON, CSV or RSS.

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