{"cve":"CVE-2026-99147","nvd":{"published":"2026-10-28T11:17:34.767","modified":"2026-10-28T11:17:34.767","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/exec: don't immediately add prelocked obj to array of locked objs\n\nWhen a contention is detected the drm_exec object grabs a reference to\nthe contended object, unlocks all other objects and pre-locks the\ncontended one before anything else.\n\nThe problem is that it is possible that this pre-locked object was about\nto be destroyed and drm_exec is now holding the last reference to it.\n\nSo we never actually see this pre-locked object again to be explicitly\nlocked and so also never reserve a slot for a dma_fence object on it.\n\nShould the driver now use drm_exec_for_each_locked_object() to add a new\nfence to all locked objects we eventually see a warning or even a\nBUG_ON() to prevent random memory corruption.\n\nFix this by keeping the prelocked object out of the array of locked objs\nuntil it was explicitly mentioned by the driver again.\n\nIf the prelocked object is never mentioned again by the driver\njust unlock and drop the reference at the end of the locking loop.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/26401a4999f1596a515b2e704e7066ac09306488","https://git.kernel.org/stable/c/7a10cd79c4d9a90334fece32fef3a8e5b1a9727b","https://git.kernel.org/stable/c/96d9996e5dbcfabed052c0d9377a382c95fed607"],"products":[],"source":"nvd","synced_at":"2026-10-28T11:37:51.394563875+00:00"},"epss":null,"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."]}