EUVD-2026-18712Lifecycle Timeline
3Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: fix OOB read in decode_int() CONS case In decode_int(), the CONS case calls get_bits(bs, 2) to read a length value, then calls get_uint(bs, len) without checking that len bytes remain in the buffer. The existing boundary check only validates the 2 bits for get_bits(), not the subsequent 1-4 bytes that get_uint() reads. This allows a malformed H.323/RAS packet to cause a 1-4 byte slab-out-of-bounds read. Add a boundary check for len bytes after get_bits() and before get_uint().
Analysis
Out-of-bounds read in Linux kernel netfilter H.323/RAS packet decoding allows local or remote attackers to read 1-4 bytes beyond allocated buffer boundaries via malformed packets. The vulnerability exists in decode_int() within nf_conntrack_h323, where insufficient boundary validation before reading variable-length integer fields permits information disclosure or potential denial of service. …
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