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CVE-2026-43233 is an out-of-bounds read vulnerability in the Linux kernel's nf_conntrack_h323 helper. In decode_choice(), a boundary check incorrectly uses len while it remains zero from initialization. When the PER bitstream is fully consumed, this check permits get_len() to read one byte beyond the heap buffer, and a second byte if the first byte has bit 7 set. A crafted Q.931 SETUP message processed by a firewall with the helper active can remotely trigger the invalid read. AddressSanitizer confirmed the one- to two-byte heap-buffer overread.
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17 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remotely triggerable out-of-bounds read in the Linux kernel's H.323 connection-tracking helper. An ineffective boundary check in decode_choice() allows get_len() to read beyond a fully consumed buffer. The report describes an AddressSanitizer-confirmed trigger and assigns CVSS v3 severity of 8.2, reflecting potential confidentiality and availability impacts. The affected Google COS kernel packages have a security update available.
A vulnerability covered by the Miracle Linux kernel package update. Individual technical details and exploit availability are not specified.
A vulnerability referenced by the CentOS local security check; no technical details are provided.
A vulnerability addressed in Huawei EulerOS UVP 2.10.1 kernel-related packages.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.