CWE-835: Infinite Loop vulnerabilities

In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N() method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML document to enter infinite loop, causing denial of service in the processing application.

Pillow is a Python imaging library. From version 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. This issue has been patched in version 12.2.0.

OpenMcdf is a fully .NET / C# library to manipulate Compound File Binary File Format files, also known as Structured Storage. Prior to version 3.1.3, OpenMcdf does not detect cycles in the directory entry red-black tree of a Compound File Binary (CFB) document. A crafted CFB file with a cycle in the LeftSiblingID / RightSiblingID chain causes Storage.EnumerateEntries() and Storage.OpenStream() to loop indefinitely, consuming the calling thread with no possibility of recovery via try/catch. This issue has been patched in version 3.1.3.

When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.

SMB2 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

DLMS/COSEM protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4

USB HID protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

SANE protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

TLS protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 allows denial of service

GNW protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

OpenFlow v5 protocol dissector infinite loops in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

OpenFlow v6 protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

MBIM protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

RPKI-Router protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

UDS protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

A weakness has been identified in Cesanta Mongoose up to 7.20. This vulnerability affects the function handle_opt of the file /src/net_builtin.c of the component TCP Option Handler. This manipulation of the argument optlen causes infinite loop. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks. Upgrading to version 7.21 is able to resolve this issue. Upgrading the affected component is advised. VulDB has contacted the vendor early and they confirmed quickly, that this issue got fixed already.

Marked versions 18.0.0 and 18.0.1 contain a critical denial of service vulnerability caused by an infinite recursion loop triggered by a specific 3-byte input sequence (tab, vertical tab, newline). This leads to unbounded memory allocation and crashes the host Node.js application due to out-of-memory conditions. The vulnerability is fixed in version 18.0.2.

CVE-2026-41146 is a high-severity vulnerability in facil.io, a C micro-framework for web applications. The issue involves uncontrolled resource consumption due to an infinite loop in the JSON parser function `fio_json_parse` when processing nested JSON values starting with the character 'i' or 'I'. This causes the process to consume 100% CPU on one core without returning a parse error. The vulnerability also affects the iodine project, which uses the same parser code. The issue is fixed in commit 5128747363055201d3ecf0e29bf0a961703c9fa0. No official patch or vendor advisory is currently provided, and no known exploits are reported in the wild.

This update for libarchive fixes the following issues - CVE-2026-4111: logical deadlock the RAR5 filter subsystem and the half-window output limiter leads to infinite loop and DoS (bsc#1259635). - CVE-2026-4424: 257-byte heap memory leak when processing a 170-byte RAR3 (bsc#1259928). - CVE-2026-4426: undefined behavior due to unvalidated operand in shift expression of the zisofs decompression code (bsc#1259931). - CVE-2026-5121: missing validation check for pz_log2_bs can a heap buffer overflow write (bsc#1261186).

Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the ClumpletReader::getClumpletSize() function can overflow the totalLength value when parsing a Wide type clumplet, causing an infinite loop. An authenticated user with INSERT privileges on any table can exploit this via a crafted Batch Parameter Block to cause a denial of service against the server. This issue has been fixed in versions 5.0.4, 4.0.7 and 3.0.14.