CVE-2026-93067
CVE CVE-2026-93067EUVD EUVD-2026-82177Published 2026-09-17T16:10:52.000Z
What the advisory describes
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").
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 12dfe7c4d9c53442efcb4113cff505f60d654906 <33c0b072e31dee98a754d9bd01800359dfeb9e8f; 12dfe7c4d9c53442efcb4113cff505f60d654906 <982caa744fce79d18f2920382aaeb0da821a6e73; 12dfe7c4d9c53442efcb4113cff505f60d654906 <9ff718df547372d70ca20ad8e66a3fb1300936b2; patch: 7.3-rc1; 5.4; 12dfe7c4d9c53442efcb4113cff505f60d654906 <dd6274706bec30d005bff0587a4262d01dc2775a; patch: 0; 12dfe7c4d9c53442efcb4113cff505f60d654906 <ebf00c51c9ac9188e2806a2b842418805ee879be; 12dfe7c4d9c53442efcb4113cff505f60d654906 <57c567e0e8aa76f6e3e8f39d7f40c20bc37e76af; patch: 6.6.157; patch: 5.10.270; patch: 6.12.110; patch: 7.2.6; patch: 5.15.221; 12dfe7c4d9c53442efcb4113cff505f60d654906 <ec6444a00c49e6c2b5e9a507272a28126677f9ee; patch: 6.1.188; patch: 6.18.52; 12dfe7c4d9c53442efcb4113cff505f60d654906 <424b762cc26d512e3e7421e57e41b4b55be2400b
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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