CVE-2026-7423

Integer underflow in the ICMP and ICMPv6 echo reply handlers in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network user to cause a denial of service device crash when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without...

CVE-2026-7424

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service permanent IP task freeze requiring hardware reset ...

EUVD-2026-26277

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service permanent IP task freeze requiring hardware reset ...

CVE-2026-7424

CVE-2026-7424 describes an integer underflow in the DHCPv6 sub-option parser of FreeRTOS-Plus-TCP. The issue affects FreeRTOS-Plus-TCP versions before V4.4.1 and before V4.2.6, and is triggered when DHCPv6 is enabled. An adjacent network actor can exploit the underflow by sending a crafted DHCPv6...

CVE-2026-7424 Integer Underflow in DHCPv6 Sub-Option Parser in FreeRTOS-Plus-TCP

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service permanent IP task freeze requiring hardware reset ...

CVE-2026-7423 Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-Plus-TCP

Integer underflow in the ICMP and ICMPv6 echo reply handlers in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network user to cause a denial of service device crash when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without...

CVE-2026-7423

The CVE affects FreeRTOS-Plus-TCP: an integer underflow in ICMP/ICMPv6 echo reply handling prior to V4.4.1 and V4.2.6. Subtracting header sizes from a packet length without validating size enables a heap out-of-bounds read (~65KB), allowing an adjacent attacker to cause a device crash (DoS) when ...

CVE-2026-7423 Integer Underflow in ICMP Echo Reply Processing in FreeRTOS-Plus-TCP

Integer underflow in the ICMP and ICMPv6 echo reply handlers in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network user to cause a denial of service device crash when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without...

CVE-2026-7423

Integer underflow in the ICMP and ICMPv6 echo reply handlers in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network user to cause a denial of service device crash when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without...

xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling

A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of servi...

Xorg: xwayland: x.org x server: denial of service via integer underflow in xkb compatibility map handling

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CVE-2026-26204: Buffer Underwrite

Wazuh is a free and open source platform used for threat prevention, detection, and response. From version 1.0.0 to before version 4.14.4, a heap-based out-of-bounds WRITE occurs in GetAlertData, resulting in writing a NULL byte exactly 1 byte before the start of the buffer allocated by strdup. D...

CVE-2026-6914: Integer Underflow (Wrap or Wraparound)

Computing the MD5 checksum of a malformed BSON object under specific conditions may cause loss of availability in MongoDB server. This issue affects all MongoDB Server v8.2 versions, all MongoDB Server v8.1 versions, MongoDB Server v8.0 versions prior to 8.0.21, MongoDB Server v7.0 versions prior...

FreeRTOS-Plus-TCP digital error vulnerability

FreeRTOS-Plus-TCP is an extensible, open-source, and thread-safe TCP/IP stack designed for use with FreeRTOS. Versions prior to V4.4.1 and V4.2.6 of FreeRTOS-Plus-TCP contained a numerical error vulnerability. This vulnerability stemmed from integer underflow in the DHCPv6 sub-option parser, whic...

CVE-2026-7424: Integer Underflow (Wrap or Wraparound)

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service permanent IP task freeze requiring hardware reset ...

PT-2026-35975

Integer underflow in the DHCPv6 sub-option parser in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network actor to corrupt the device's IPv6 address assignment, DNS configuration, and lease times, and to cause a denial of service permanent IP task freeze requiring hardware reset ...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : UltraJSON vulnerabilities (USN-8219-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8219-1 advisory. Cameron Criswell discovered that UltraJSON contained a memory leak that would occur when parsing large integers. An...

CVE-2026-7423: Integer Underflow (Wrap or Wraparound)

Integer underflow in the ICMP and ICMPv6 echo reply handlers in FreeRTOS-Plus-TCP before V4.4.1 and V4.2.6 allows an adjacent network user to cause a denial of service device crash when outgoing ping support is enabled, because header sizes are subtracted from a packet length field without...

xorg: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling

A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of servi...

CVE-2026-40356

In MIT Kerberos 5 aka krb5 before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gssacceptseccontext on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process t...