Answer in brief
CVE-2026-93067 records a Unknown severity vulnerability in drm/bridge: tc358767: clamp the reported AUX read size to the request. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=12dfe7c4d9c53442efcb4113cff505f60d654906 <ebf00c51c9ac9188e2806a2b842418805ee879be || >=12dfe7c4d9c53442efcb4113cff505f60d654906 <424b762cc26d512e3e7421e57e41b4b55be2400b || >=12dfe7c4d9c53442efcb4113cff505f60d654906 <dd6274706bec30d005bff0587a4262d01dc2775a || >=12dfe7c4d9c53442efcb4113cff505f60d654906 <982caa744fce79d18f2920382aaeb0da821a6e73 || >=12dfe7c4d9c53442efcb4113cff505f60d654906 <33c0b072e31dee98a754d9bd01800359dfeb9e8f || >=12dfe7c4d9c53442efcb4113cff505f60d654906 <57c567e0e8aa76f6e3e8f39d7f40c20bc37e76af || >=12dfe7c4d9c53442efcb4113cff505f60d654906 <9ff718df547372d70ca20ad8e66a3fb1300936b2 || >=12dfe7c4d9c53442efcb4113cff505f60d654906 <ec6444a00c49e6c2b5e9a507272a28126677f9ee | ebf00c51c9ac9188e2806a2b842418805ee879be, 424b762cc26d512e3e7421e57e41b4b55be2400b, dd6274706bec30d005bff0587a4262d01dc2775a, 982caa744fce79d18f2920382aaeb0da821a6e73, 33c0b072e31dee98a754d9bd01800359dfeb9e8f, 57c567e0e8aa76f6e3e8f39d7f40c20bc37e76af, 9ff718df547372d70ca20ad8e66a3fb1300936b2, ec6444a00c49e6c2b5e9a507272a28126677f9ee |
| Linux/Linuxgeneric | 5.4 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
In the Linux kernel, the following vulnerability has been resolved: drm/bridge: tc358767: clamp the reported AUX read size to the request tc_aux_transfer() clamps an AUX read to the payload limit: size_t size = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES - 1, msg->size); After the transfer it replaces size with the byte count the controller reports in AUX_BYTES: if (size) size = FIELD_GET(AUX_BYTES, auxstatus); AUX_BYTES is GENMASK(15, 8), so it can be up to 255. Nothing clamps it back to the request. tc_aux_read_data() reads that many bytes into the 16-byte auxrdata stack buffer, then copies them into the caller buffer. A reported count of 255 makes the read run to 256 bytes and overruns both. The controller should never report more than it was asked to transfer, so this is defense in depth rather than a live hole. The reported count is only lightly trusted, and the check is cheap. Clamp it back to the request, the same way ti-sn65dsi86 does in commit aca58eac52b8 ("drm/bridge: ti-sn65dsi86: Never store more than msg->size bytes in AUX xfer").
Quoted source text, attributed separately from HOL analysis.