{"cve":"CVE-2026-80887","nvd":{"published":"2026-09-04T18:17:56.667","modified":"2026-09-04T18:17:56.667","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: use check_add_overflow for shader size+offset bound\n\nvmw_shader_define() validates the user-supplied shader window against\nits backing buffer with\n\n\t(u64)buffer->tbo.base.size < (u64)size + (u64)offset\n\ndrm_vmw_shader_create_arg::offset is __u64 in the uapi; when it is\nnear U64_MAX the unsigned addition wraps and the resulting tiny value\npasses the check.  The unbounded offset is then stored in\nres->guest_memory_offset and forwarded to host SVGA shader-create\ncommands.\n\nUse check_add_overflow() to detect the wrap and compare the resulting\nendpoint against the buffer size.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/1bbe7751f5ebac383405ef29a66622d65bd505d3","https://git.kernel.org/stable/c/54d56d5b42d2e4c72ba6e365e9774da90698aa22","https://git.kernel.org/stable/c/5c725901908eb1e52a16fc0e2373cb761df42d21","https://git.kernel.org/stable/c/cfd163169af3be56eaef113c680ea251f0d09189","https://git.kernel.org/stable/c/d3f44438aa805270aaead3b6840ccaea0f4c11f9"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-80887","score":0.00168,"percentile":0.06046,"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."]}