C-ares vulnerabilities

Products

• C-ares 16

Newest

• c-ares c-ares: Memory-amplification denial of service via unvalidated DNS header record counts CVE-2026-69186 Fix available 5.3 MediumAugust 15, 2026
• c-ares c-ares: CPU-exhaustion denial of service via unbounded DNS name compression pointer chains CVE-2026-69184 Fix available 7.5 HighAugust 15, 2026
• c-ares c-ares : Use-after-free / double-free in c-ares query-completion handling, remotely triggerable via ares_getaddrinfo() over TCP CVE-2026-33630 Fix available 7.5 HighJuly 9, 2026
• c-ares c-ares has a Use After Free vulnerability when connection is cleaned up after error CVE-2025-62408 Fix available 5.9 MediumDecember 8, 2025
• c-ares c-ares has a use-after-free in read_answers() CVE-2025-31498 Fix available 8.3 HighApril 8, 2025
• c-ares, fedoraproject fedora +1 more c-ares out of bounds read in ares__read_line() CVE-2024-25629 Fix available 4.4 MediumFebruary 23, 2024
• c-ares, debian linux +1 more Buffer overflow vulnerability in c-ares before 1_16_1 thru 1_17_0 via function... CVE-2020-22217 Fix available 5.9 MediumAugust 22, 2023
• c-ares, debian linux, fedoraproject fedora +2 more 0-byte UDP payload DoS in c-ares CVE-2023-32067 Fix available 7.5 HighMay 25, 2023
• c-ares, fedoraproject fedora +1 more Insufficient randomness in generation of DNS query IDs in c-ares CVE-2023-31147 Fix available 5.9 MediumMay 25, 2023
• c-ares, debian linux, fedoraproject fedora +2 more Buffer Underwrite in ares_inet_net_pton() CVE-2023-31130 Fix available 4.1 MediumMay 25, 2023
• c-ares, fedoraproject fedora +1 more AutoTools does not set CARES_RANDOM_FILE during cross compilation CVE-2023-31124 Fix available 3.7 LowMay 25, 2023
• c-ares, fedoraproject fedora, redhat enterprise linux +1 more +3 more A flaw was found in the c-ares package. The ares_set_sortlist is missing checks about the... CVE-2022-4904 Fix available 8.6 HighFebruary 15, 2023
• c-ares, fedoraproject fedora, nodejs node.js +14 more +16 more A flaw was found in c-ares library, where a missing input validation check of host names returned... CVE-2021-3672 Fix available 5.6 MediumAugust 10, 2021
• c-ares, fedoraproject fedora +1 more A possible use-after-free and double-free in c-ares lib version 1.16.0 if ares_destroy() is... CVE-2020-14354 Fix available 3.3 LowMay 13, 2021
• c-ares, nodejs node.js +1 more The c-ares function `ares_parse_naptr_reply()`, which is used for parsing NAPTR responses, could... CVE-2017-1000381 Fix available 7.5 HighJune 22, 2017
• c-ares, canonical ubuntu linux, debian linux +1 more +3 more Heap-based buffer overflow in the ares_create_query function in c-ares 1.x before 1.12.0 allows... CVE-2016-5180 Public exploitFix available 9.8 CriticalSeptember 30, 2016