CVE-2026-68277

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> drm/dp/mst: fix OOB reads on 2-byte fields in sideband reply parsers<br /> <br /> Three sideband reply parsers read 16-bit fields as:<br /> <br /> val = (raw-&gt;msg[idx] curlen,<br /> raw-&gt;msg[idx+1] reads one byte past the received message data into<br /> the following struct fields (curchunk_len, curchunk_idx, curlen).<br /> <br /> Affected functions:<br /> - drm_dp_sideband_parse_enum_path_resources_ack()<br /> full_payload_bw_number and avail_payload_bw_number fields<br /> - drm_dp_sideband_parse_allocate_payload_ack()<br /> allocated_pbn field<br /> - drm_dp_sideband_parse_query_payload_ack()<br /> allocated_pbn field<br /> <br /> Fix by using a single combined check (idx + 2 &gt; curlen) before each<br /> 2-byte read. Since the check is strictly tighter than idx &gt; curlen,<br /> no separate step is needed.<br /> <br /> [added fixes tag]