CVE-2026-29008 U-Boot 2026.04-rc3 Integer Underflow DoS via tcp_rx_state_machine()

U-Boot through 2026.04-rc3 contains an integer underflow vulnerability in the tcprxstatemachine function net/tcp.c that allows a network-adjacent attacker to crash the bootloader by sending a malformed TCP SYN+ACK packet with a manipulated data offset field causing payloadlen to become negative...

CVE-2026-29008

U-Boot 2026.04-rc3 contains a vulnerability in tcp_rx_state_machine() (net/tcp.c) that can crash the bootloader via a malformed TCP SYN+ACK with manipulated data offset, causing payload_len to become negative. The negative value is implicitly converted to a large unsigned integer and passed to me...

CVE-2026-29008 U-Boot 2026.04-rc3 Integer Underflow DoS via tcp_rx_state_machine()

U-Boot through 2026.04-rc3 contains an integer underflow vulnerability in the tcprxstatemachine function net/tcp.c that allows a network-adjacent attacker to crash the bootloader by sending a malformed TCP SYN+ACK packet with a manipulated data offset field causing payloadlen to become negative...

CVE-2026-55490

OpenWrt is a Linux operating system targeting embedded devices. Before v25.12.5, an integer underflow in handlesenda of the Emergency Access Daemon allows any unauthenticated attacker on the local network to crash the daemon by sending a single crafted UDP packet. The message length underflows...

CVE-2026-55490

OpenWrt OpenWrt (embedded Linux) mediateces: CVE-2026-55490 affects the Emergency Access Daemon’s handle_send_a() where an integer underflow can lead to a pre-auth DoS by an unauthenticated attacker on the local network via a crafted UDP packet. The underflow causes a bounds-check misstep, then a...

Security Bulletin: Security vulnerabilities have been found in IBM Application Gateway

Summary Security vulnerabilities have been addressed in IBM Application Gateway Vulnerability Details CVEID:CVE-2026-40355 DESCRIPTION: In MIT Kerberos 5 aka krb5 before 1.22.3, there is a NULL pointer dereference if an application calls gssacceptseccontext on a system with a NegoEx mechanism...

kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()

A flaw was found in the Linux kernel's netfilter subsystem, specifically within the nfconntrackh323 module. This vulnerability occurs in the DecodeQ931 function when processing a zero-length value from a packet. An integer underflow during a length calculation results in a large, incorrect value...

kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()

A flaw was found in the Linux kernel's netfilter subsystem, specifically within the nfconntrackh323 module. This vulnerability occurs in the DecodeQ931 function when processing a zero-length value from a packet. An integer underflow during a length calculation results in a large, incorrect value...

kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931()

A flaw was found in the Linux kernel's netfilter subsystem, specifically within the nfconntrackh323 module. This vulnerability occurs in the DecodeQ931 function when processing a zero-length value from a packet. An integer underflow during a length calculation results in a large, incorrect value...

CVE-2026-6685

FatFs R0.16 and earlier exhibits a stale dirty-cache skip via unsigned-subtraction wrap in fread / fwrite fp-sect - sect cc during interleaved read/write on fragmented filesystems. This maps to CWE-191 Integer Underflow. Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H 6.1...

CVE-2026-6685

FatFs R0.16 and earlier exhibits a stale dirty-cache skip via unsigned-subtraction wrap in fread / fwrite fp-sect - sect cc during interleaved read/write on fragmented filesystems. This maps to CWE-191 Integer Underflow. Estimated CVSS v3.1 vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H 6.1...

CVE-2026-6685

FatFs CVE-2026-6685 affects FatFs R0.16 and earlier, where a stale dirty-cache skip can occur due to an unsigned-subtraction wrap in f_read() and f_write() during interleaved reads/writes on fragmented filesystems (fp->sect - sect < cc). The root cause is an integer underflow (CWE-191) in t...

PT-2026-54927

Name of the Vulnerable Software and Affected Versions FatFs versions R0.16 and earlier Description An integer underflow occurs during interleaved read and write operations on fragmented filesystems. This issue is caused by an unsigned-subtraction wrap in the f read and f write functions when...

SUSE-SU-2026:22459-1 Security update for pcr-oracle

This update for pcr-oracle fixes the following issues Update to 0.6.3: Security issue: - integer underflow vulnerability in parsesbatlevelsection bsc1265042. Non security issue: - Lockout Authorization error for libvirt-emulated TPM bsc1265871. Changes for pcr-oracle: + Relax TPM self-test...

CVE-2026-58016

The CVE-2026-58016 entry concerns GLib, specifically a flaw in g_dbus_node_info_new_for_xml() in gio/gdbusintrospection.c. The issue arises when parsing malformed D-Bus introspection XML (notably a element nested inside ///), causing an unsigned integer overflow and an out-of-bounds read, which ...

SUSE-SU-2026:22450-1 Security update for krb5

This update for krb5 fixes the following issue - CVE-2026-11850: integer underflow in berval2tldata leads to heap out-of-bounds read bsc1268131...

Linux Distros Unpatched Vulnerability : CVE-2026-6678

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Integer underflow in wcPKCS7DecryptOri when handling crafted Other Recipient Info, leading to incorrect length handling during decryption. CVE-2026-6678 Note th...

Security update for krb5 (moderate)

openSUSE security update: security update for krb5 ------------------------------------------------------------- Announcement ID: openSUSE-SU-2026:21021-1 Rating: moderate References: bsc1263366 bsc1263367 Cross-References: CVE-2026-40355 CVE-2026-40356 CVSS scores: CVE-2026-40355 SUSE : 5.9...

CVE-2026-58058

A flaw was found in Nmap. A remote attacker or a scanned target can send a specially crafted IPv6 response with a truncated extension header. This can lead to an integer underflow, causing out-of-bounds reads and a denial of service DoS due to a crash during raw IPv6 scans. Mitigation Mitigation...

gnutls: GnuTLS: Denial of Service via DTLS zero-length fragment

A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service...