{"cve":"CVE-2026-68272","nvd":{"published":"2026-08-10T13:20:16.220","modified":"2026-08-17T05:18:29.733","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu: validate CP_GFX_SHADOW chunk size in CS pass1\n\nAdd a minimum-length check for the AMDGPU_CHUNK_ID_CP_GFX_SHADOW chunk in\namdgpu_cs_pass1(), matching the gate already present for the IB, FENCE and\nBO_HANDLES chunk types.\n\nThe CP_GFX_SHADOW case previously shared a bare break with the dependency\nand syncobj chunk types, which do not dereference a fixed-size struct. When\nuserspace submits this chunk with length_dw == 0, vmemdup_array_user() is\ncalled with size 0 and returns ZERO_SIZE_PTR, which passes the IS_ERR()\ncheck. amdgpu_cs_p2_shadow() then dereferences chunk->kdata as a struct\ndrm_amdgpu_cs_chunk_cp_gfx_shadow (reading shadow->flags), faulting on the\nZERO_SIZE_PTR and causing a NULL-pointer dereference.\n\nThis is reachable by an unprivileged process in the render group. Reject\nundersized chunks with -EINVAL during pass1 so the bad submission is\nrejected before pass2 ever dereferences the data.\n\n(cherry picked from commit 7f61b2eef7415eccdb40850aca0de94211948657)","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/24668ca3ec19434d7a9574bf9112f2b0614c3a4e","https://git.kernel.org/stable/c/2aa9ea2bd5146d237c8cc16d8737d878b0298a94","https://git.kernel.org/stable/c/315d2e5741a81b0be763e80413a2677e22b7e596","https://git.kernel.org/stable/c/3f190956404da55560056ce20606010e18bc059c","https://git.kernel.org/stable/c/84c4c36acd5c4b2558b5069f869a165b2c655c84"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:47:54.990491175+00:00"},"epss":{"cve":"CVE-2026-68272","score":0.00175,"percentile":0.07018,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}