CVE-2026-86133 Fireware OS Pre-Authentication Integer Underflow in iked Allows Remote Denial of Service

An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon iked allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service...

CVE-2026-86133

An integer underflow vulnerability exists in the WatchGuard Fireware OS IKE daemon (iked ). A remote attacker who has completed the initial IKEv2 handshake can crash the iked process by sending a specially crafted encrypted IKEv2 message, leading to a denial of service . No specific exploit detai...

CVE-2026-86132 Fireware OS Pre-Authentication Integer Underflow in iked Allows Denial of Service

An integer underflow vulnerability in the WatchGuard Fireware OS IKEv2 daemon iked allows a remote, unauthenticated attacker to crash the process by sending a specially crafted encrypted IKEv2 message negotiated with an AES-GCM cipher suite...

CVE-2026-86133 Fireware OS Pre-Authentication Integer Underflow in iked Allows Remote Denial of Service

An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon iked allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service...

hdf5: HDF5: Denial of Service via integer underflow in Fletcher32 filter

A flaw was found in HDF5. An attacker can craft a malicious HDF5 file with a specially designed Fletcher32-filtered chunk. When this file is processed, an integer underflow occurs due to insufficient size validation, leading to a massive out-of-bounds read. This vulnerability can cause the...

CVE-2026-102714

nxicmpv6validateoptions scans the option area with while length 2 common/src/nxicmpv6validateoptions.c:79. An area whose size leaves a one- or two-byte residue exits the loop with that tail unexamined; the residue is not negative, so the function returns NXSUCCESS. Its zero-length rejection never...

Exploit for Integer Underflow (Wrap or Wraparound) in Microsoft

CVE-2024-38063: Exploitation, Detection & Mitigation Lab O...

CVE-2026-97413

A flaw was found in the Linux kernel's Remote Direct Memory Access RDMA subsystem. A malicious client can trigger an integer underflow by sending a specially crafted message with an oversized length field during read or write operations. This improper validation leads to an out-of-bounds memory...

MikroTik RouterOS

ADVISORY SUMMARY Successful exploitation of this vulnerability could allow an attacker to achieve remote code execution or cause a denial of service. 2. RECOMMENDED PRACTICES CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize...

PT-2026-102956

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS affected versions not specified Description An integer underflow in the IKE daemon iked allows a remote attacker to cause a denial of service. After completing the initial IKEv2 handshake, the attacker can crash the iked...

PT-2026-102912

Name of the Vulnerable Software and Affected Versions MikroTik RouterOS affected versions not specified Description A critical pre-authentication integer underflow allows unauthenticated attackers to execute arbitrary code with root privileges. An integer underflow occurs when an arithmetic...

PT-2026-102955

Name of the Vulnerable Software and Affected Versions WatchGuard Fireware OS affected versions not specified Description An integer underflow in the IKEv2 daemon iked allows a remote, unauthenticated attacker to crash the process. This is achieved by sending a specially crafted encrypted IKEv2...

Ubuntu 18.04 LTS / 24.04 LTS : catdoc vulnerabilities (USN-8838-1)

The remote Ubuntu 18.04 LTS / 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8838-1 advisory. It was discovered that catdoc had an integer overflow when processing shared string tables in malformed spreadsheet files. An attacker could...

SUSE CVE-2026-93784

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: validate IEs in cfg80211wextsiwgenie The KASAN allocation trace shows that a malformed IE buffer is stored via SIOCSIWGENIE cfg80211wextsiwgenie without any validation. The crash trace shows that a subsequent...

CVE-2026-97551

A flaw was found in the Linux kernel's XFS file system. A local user can trigger a Denial of Service DoS by forcing an unexpected filesystem shutdown. When updating parent pointer attributes, the kernel fails to properly initialize the block reservation counter, causing an integer underflow durin...

CVE-2026-18747 Integer underflow of net_buf length in the MCUmgr serial (SMP over console) transport leads to out-of-bounds read

The MCUmgr SMP-over-console transport decodes a base64 frame, reads a 16-bit packet length from it, verifies a CRC and then unconditionally strips the trailing CRC with rxctxt-nb-len -= 2U; in mcumgrserialprocessfrag subsys/mgmt/mcumgr/transport/src/serialutil.c. mcumgrserialextractlen accepted a...

CVE-2026-18747

The MCUmgr SMP-over-console transport in the Zephyr RTOS (specifically affecting CONFIG_MCUMGR_TRANSPORT_UART and CONFIG_MCUMGR_TRANSPORT_SHELL) is vulnerable to an integer underflow in mcumgr_serial_process_frag(). The system fails to properly validate declared packet lengths of 0 or 1; when the...

CVE-2026-18747 Integer underflow of net_buf length in the MCUmgr serial (SMP over console) transport leads to out-of-bounds read

The MCUmgr SMP-over-console transport decodes a base64 frame, reads a 16-bit packet length from it, verifies a CRC and then unconditionally strips the trailing CRC with rxctxt-nb-len -= 2U; in mcumgrserialprocessfrag subsys/mgmt/mcumgr/transport/src/serialutil.c. mcumgrserialextractlen accepted a...

CVE-2026-18747 Integer underflow of net_buf length in the MCUmgr serial (SMP over console) transport leads to out-of-bounds read

The MCUmgr SMP-over-console transport decodes a base64 frame, reads a 16-bit packet length from it, verifies a CRC and then unconditionally strips the trailing CRC with rxctxt-nb-len -= 2U; in mcumgrserialprocessfrag subsys/mgmt/mcumgr/transport/src/serialutil.c. mcumgrserialextractlen accepted a...

kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math

A flaw was found in the Linux kernel's Soft-iWARP siw component for Remote Direct Memory Access RDMA. A remote attacker can send a specially crafted iWARP Fast Path Data Unit FPDU with a manipulated length field. This manipulation causes an integer underflow, leading to a use-after-free...