{"cve":"CVE-2026-98243","nvd":{"published":"2026-10-06T09:18:12.383","modified":"2026-10-19T10:18:25.193","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndma-buf/dma-fence: fix checking signaling bit for timeline and driver name v3\n\nThe patch \"dma-buf: dma-fence: Fix potential NULL pointer dereference\"\nchanged the check to test for the ops pointer instead of the signaled\nbit to avoid a potential NULL dereference when the ops pointer has been\ncleared.\n\nThe problem is now that the ops pointer is cleared only when neither the\nrelease nor the wait callback is implemented and this isn't true for a lot\nof dma_fence implementations yet. So those implementations lost the RCU\nprotection after signaling of the returned string resulting in potential\nuse after free.\n\nAdd the signaling check additional to the ops pointer check so that we\nhave both the protection against NULL dereference as well as the RCU\nprotection after signaling for the returned string.\n\nv2: improve comments to note RCU protection and explain why we check\n    both signaling state and ops pointer\nv3: some comment improvements suggested by Philip","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1},"cwes":[],"references":["https://git.kernel.org/stable/c/3ed11c671ff7ec58c8fd96410233c677df23f407","https://git.kernel.org/stable/c/a4db25b8949d6ff9c1a685a1273a015e8bab29db"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-98243","score":0.00117,"percentile":0.01667,"date":"2026-10-25"},"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."]}