CVE-2026-68277
CVE CVE-2026-68277EUVD EUVD-2026-55378Published 2026-08-10T12:01:53.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: drm/dp/mst: fix OOB reads on 2-byte fields in sideband reply parsers Three sideband reply parsers read 16-bit fields as: val = (raw->msg[idx] << 8) | (raw->msg[idx+1]); and check bounds only after the fact. When idx == raw->curlen, raw->msg[idx+1] reads one byte past the received message data into the following struct fields (curchunk_len, curchunk_idx, curlen). Affected functions: - drm_dp_sideband_parse_enum_path_resources_ack() full_payload_bw_number and avail_payload_bw_number fields - drm_dp_sideband_parse_allocate_payload_ack() allocated_pbn field - drm_dp_sideband_parse_query_payload_ack() allocated_pbn field Fix by using a single combined check (idx + 2 > curlen) before each 2-byte read. Since the check is strictly tighter than idx > curlen, no separate step is needed. [added fixes tag]
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 3.17; patch: 7.2-rc1; patch: 6.6.148; patch: 7.1.6; patch: 6.12.101; patch: 0; ad7f8a1f9ced7f049f9b66d588723f243a7034cd <d5c70523cafa26ad2c7a37b612849abe2683baa8; ad7f8a1f9ced7f049f9b66d588723f243a7034cd <bdf0508b1e6785d4a8982c637e97e68d60b47d7b; patch: 6.18.42; ad7f8a1f9ced7f049f9b66d588723f243a7034cd <0bcd7675c69a2462a8531fcd9e4d096e9c7ec5df; ad7f8a1f9ced7f049f9b66d588723f243a7034cd <68a624416d1dd481b3e5b7ea0e8a070a9b8a2c73; ad7f8a1f9ced7f049f9b66d588723f243a7034cd <6b89ba3dba2f583626fb693e47e951ffb8bf591f
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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