Threat database

CVE-2026-115327 is a medium severity vulnerability in CESNET libyang up to version 6.4.13. It involves an uninitialized pointer free in the function lydxml_env_netconf_rpc() when parsing NETCONF RPC action envelopes. An attacker with a NETCONF session can send crafted action elements containing non-whitespace text to cause server crashes or heap corruption in affected software such as netopeer2.

A critical heap-based buffer overflow vulnerability exists in esnet iperf3 versions 3.20 and 3.21. The flaw occurs in the decrypt_rsa_message() function, where a 256-byte RSA buffer is read with an attacker-controlled ciphertext length, allowing an unauthenticated client to overflow the heap using an oversized authtoken. This vulnerability has been fixed in version 3.22.

iperf3 version 3.21 contains a critical remote, unauthenticated heap use-after-free vulnerability. The issue arises because the server's per-test watchdog function frees streams without properly cancelling or joining their associated worker threads, leading to a use-after-free condition when a blocked worker thread dereferences a freed iperf_stream. This vulnerability is fixed in version 3.22.

iperf3 versions from 3.14 up to but not including 3.22 contain a denial of service vulnerability that allows unauthenticated remote attackers to cause an infinite loop in the server's UDP receive worker. This results in the affected per-stream receive thread consuming approximately 100% CPU, making the server unresponsive until forcibly terminated.

libyang is a YANG data modeling language library. Prior to SO 5.2.15, lyb_read_string() in src/parser_lyb.c contains an integer overflow that results in a heap buffer overflow when parsing a maliciously crafted LYB binary blob. An attacker who can supply LYB data to any libyang consumer (NETCONF server, sysrepo, etc.) can trigger a crash or potential heap corruption. This vulnerability is fixed in SO 5.2.15.