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.
18 results
Sep 5, 2026libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the nCVE-2026-6554 · Other software · The Tcpdump Group · reported by security@tcpdump.orgHigh 7.5
libpcap BPF interpreter treats the offset in the 'ja L' BPF instruction as a signed integer to implement looping via backward jumps, but it does not limit the number of loop iterations. A crafted filter program or the 'protochain' primitive used on a crafted network packet can cause the interpreter to loop infinitely.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordgithub.comopenwall.com
Sep 5, 2026libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero.CVE-2026-6244 · Other software · The Tcpdump Group · reported by security@tcpdump.orgMedium 5.5
libpcap BPF interpreter for the 'div #k' and 'mod #k' ALU instructions does not check whether the immediate value is zero. In particular uncommon use cases a crafted filter program can cause a division by zero.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 5, 2026libpcap BPF interpreter detects neither reaching the end of the filter program buffer due to lack of a return instruction nor executing a jump instruction with CVE-2026-31912 · Other software · The Tcpdump Group · reported by security@tcpdump.orgMedium 5.5
libpcap BPF interpreter detects neither reaching the end of the filter program buffer due to lack of a return instruction nor executing a jump instruction with an offset that translates to a pointer outside of the buffer. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading the OS process memory in the 32GiB around the buffer on 64-bit architectures and in the entire address space on 32-bit architectures.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 5, 2026libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an invalid opcode.CVE-2026-31911 · Other software · The Tcpdump Group · reported by security@tcpdump.orgMedium 5.5
libpcap BPF interpreter calls abort() if it encounters a BPF instruction that has an invalid opcode. In particular uncommon use cases a crafted filter program can terminate the OS process.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 5, 2026rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memCVE-2026-18313 · Other software · The Tcpdump Group · reported by security@tcpdump.orgMedium 4.3
rpcapd can allocate up to 65536 bytes per each RPCAP_MSG_UPDATEFILTER_REQ or RPCAP_MSG_STARTCAP_REQ message received from the client, but it never frees the memory, so it leaks memory even under normal use. A malicious client can cause the server to leak memory substantially faster.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 5, 2026The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers.CVE-2026-18238 · Other software · The Tcpdump Group · reported by security@tcpdump.orgMedium 5
The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers. A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Sep 5, 2026In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcCVE-2026-0799 · Other software · The Tcpdump Group · reported by security@tcpdump.orgHigh 8.7
In BPF instructions that load/store a value from/to a scratch memory register the register index is an unsigned 32-bit integer and must not exceed 15, but libpcap BPF interpreter does not validate the value. In particular uncommon use cases a crafted filter program can cause the interpreter to try reading and writing the OS process memory in the 16GiB starting at the current stack frame on 64-bit architectures and in the entire address space on 32-bit architectures.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Dec 30, 2025On Windows only, if libpcap needs to convert a Windows error message to UTF-8 and the message includes characters that UTF-8 represents using 4 bytes, utf_16le_CVE-2025-11964 · Other software · The Tcpdump Group · reported by security@tcpdump.orgLow 1.9
On Windows only, if libpcap needs to convert a Windows error message to UTF-8 and the message includes characters that UTF-8 represents using 4 bytes, utf_16le_to_utf_8_truncated() can write data beyond the end of the provided buffer.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Dec 30, 2025pcap_ether_aton() is an auxiliary function in libpcap, it takes a string argument and returns a fixed-size allocated buffer.CVE-2025-11961 · Other software · The Tcpdump Group · reported by security@tcpdump.orgLow 1.9
pcap_ether_aton() is an auxiliary function in libpcap, it takes a string argument and returns a fixed-size allocated buffer. The string argument must be a well-formed MAC-48 address in one of the supported formats, but this requirement has been poorly documented. If an application calls the function with an argument that deviates from the expected format, the function can read data beyond the end of the provided string and write data beyond the end of the allocated buffer.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 30, 2024Remote packet capture support is disabled by default in libpcap.CVE-2024-8006 · Other software · The Tcpdump Group · reported by security@tcpdump.orgMedium 4.4
Remote packet capture support is disabled by default in libpcap. When a user builds libpcap with remote packet capture support enabled, one of the functions that become available is pcap_findalldevs_ex(). One of the function arguments can be a filesystem path, which normally means a directory with input data files. When the specified path cannot be used as a directory, the function receives NULL from opendir(), but does not check the return value and passes the NULL value to readdir(), which causes a NULL pointer derefence.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Aug 30, 2024In affected libpcap versions during the setup of a remote packet capture the internal function sock_initaddress() calls getaddrinfo() and possibly freeaddrinfo(CVE-2023-7256 · Other software · The Tcpdump Group · reported by security@tcpdump.orgMedium 4.4
In affected libpcap versions during the setup of a remote packet capture the internal function sock_initaddress() calls getaddrinfo() and possibly freeaddrinfo(), but does not clearly indicate to the caller function whether freeaddrinfo() still remains to be called after the function returns. This makes it possible in some scenarios that both the function and its caller call freeaddrinfo() for the same allocated memory block. A similar problem was reported in Apple libpcap, to which Apple assigned CVE-2023-40400.
- Product
- libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Oct 3, 2019sf-pcapng.c in libpcap before 1.9.1 does not properly validate the PHB header length before allocating memory.CVE-2019-15165 · Other software · Tcpdump · reported by MITREMedium 5.3
sf-pcapng.c in libpcap before 1.9.1 does not properly validate the PHB header length before allocating memory.
- Product
- Libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordlists.opensuse.orglists.opensuse.org
Oct 3, 2019rpcapd/daemon.c in libpcap before 1.9.1 allows SSRF because a URL may be provided as a capture source.CVE-2019-15164 · Other software · Tcpdump · reported by MITREMedium 5.3
rpcapd/daemon.c in libpcap before 1.9.1 allows SSRF because a URL may be provided as a capture source.
- Product
- Libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordseclists.orggithub.com
Oct 3, 2019rpcapd/daemon.c in libpcap before 1.9.1 allows attackers to cause a denial of service (NULL pointer dereference and daemon crash) if a crypt() call fails.CVE-2019-15163 · Other software · Tcpdump · reported by MITREHigh 7.5
rpcapd/daemon.c in libpcap before 1.9.1 allows attackers to cause a denial of service (NULL pointer dereference and daemon crash) if a crypt() call fails.
- Product
- Libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordseclists.orggithub.com
Oct 3, 2019rpcapd/daemon.c in libpcap before 1.9.1 on non-Windows platforms provides details about why authentication failed, which might make it easier for attackers to eCVE-2019-15162 · Other software · Tcpdump · reported by MITREMedium 5.3
rpcapd/daemon.c in libpcap before 1.9.1 on non-Windows platforms provides details about why authentication failed, which might make it easier for attackers to enumerate valid usernames.
- Product
- Libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordseclists.orggithub.com
Oct 3, 2019rpcapd/daemon.c in libpcap before 1.9.1 mishandles certain length values because of reuse of a variable.CVE-2019-15161 · Other software · Tcpdump · reported by MITREMedium 5.3
rpcapd/daemon.c in libpcap before 1.9.1 mishandles certain length values because of reuse of a variable. This may open up an attack vector involving extra data at the end of a request.
- Product
- Libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordseclists.orggithub.com
Oct 20, 2017pcap-linux.c in libpcap 1.1.1 before commit ea9432fabdf4b33cbc76d9437200e028f1c47c93 when snaplen is set may truncate packets, which might allow remote attackerCVE-2011-1935 · Other software · Tcpdump · reported by Red HatCritical 9.8
pcap-linux.c in libpcap 1.1.1 before commit ea9432fabdf4b33cbc76d9437200e028f1c47c93 when snaplen is set may truncate packets, which might allow remote attackers to send arbitrary data while avoiding detection via crafted packets.
- Product
- Libpcap
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordarticle.gmane.orgthread.gmane.org
Jun 18, 2014wiretap/libpcap.c in the libpcap file parser in Wireshark 1.10.x before 1.10.4 allows remote attackers to execute arbitrary code or cause a denial of service (mCVE-2014-4174 · Other software · Wireshark · reported by MITREHigh 9.3
wiretap/libpcap.c in the libpcap file parser in Wireshark 1.10.x before 1.10.4 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted packet-trace file that includes a large packet.
- Product
- Wireshark
- What to do
- Apply the vendor’s update. The NVD record links to the advisory.
Full record and what to do →NVD recordanonsvn.wireshark.organonsvn.wireshark.org
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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