{"cve":"CVE-2026-74381","nvd":{"published":"2026-08-15T06:22:39.927","modified":"2026-08-17T06:19:32.973","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ngpu: host1x: Allow entries in BO caches to be freed\n\nWhen a buffer object is pinned via host1x_bo_pin() with a cache, the\nresulting mapping is kept in the cache so it can be reused on subsequent\npins. Each mapping held a reference to the underlying host1x_bo (taken\nin tegra_bo_pin / gather_bo_pin), so as long as a mapping was cached,\nthe bo itself could not be freed.\n\nHowever, the only way to remove the cached mapping was through the free\npath of the buffer object. This meant that if a bo got cached, it could\nnever get freed again.\n\nResolve the circularity by holding a weak reference to the bo from the\ncache side. This is done by having the .pin callbacks not bump the bo's\nrefcount -- instead the common Host1x bo code does so, except for the\ncache reference.\n\nAlso move the remove-cache-mapping-on-free code into a common function\ninside Host1x code. This is only called from the TegraDRM GEM buffers\nsince those are the only ones that can be cached at the moment.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/0e9dd7cfb9986b78cc81eca126ccfbf57f4c0602","https://git.kernel.org/stable/c/3cbf5e3c46e66d9b3b6b91099bb720c6cb1be3bc","https://git.kernel.org/stable/c/71c017b3f83ff72638f2a1b1d6d4e7bc61d30231","https://git.kernel.org/stable/c/8c0d3cf0d5108c96317e0eca92b60dd368867cef","https://git.kernel.org/stable/c/af755456299d44e4ed6af3b7c70a7f03ea37fdf1"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:10.689564601+00:00"},"epss":{"cve":"CVE-2026-74381","score":0.00215,"percentile":0.11866,"date":"2026-11-01"},"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."]}