{"id":"CVE-2026-98585","title":"eth: fbnic: Avoid rounding zero ring sizes","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\neth: fbnic: Avoid rounding zero ring sizes\n\nroundup_pow_of_two() is undefined for zero. ethtool permits a zero ring\nsize to reach the driver, where the minimum-size che…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 6cbf18a05c06090d867ef417a2a30b214d42d171 < 92c9f2ea634d92adff5403d231ebeda683c5685a","Linux >= 6cbf18a05c06090d867ef417a2a30b214d42d171 < 491aa3167ae02f219cb2d2de6f4196d28dca03be","Linux >= 6cbf18a05c06090d867ef417a2a30b214d42d171 < 0160953d8eec75c3c55562158c46442ff1fd410b","Linux 6.15"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:18:58.018Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98585","references":[{"url":"https://git.kernel.org/stable/c/92c9f2ea634d92adff5403d231ebeda683c5685a"},{"url":"https://git.kernel.org/stable/c/491aa3167ae02f219cb2d2de6f4196d28dca03be"},{"url":"https://git.kernel.org/stable/c/0160953d8eec75c3c55562158c46442ff1fd410b"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.251Z","slug":"CVE-2026-98585","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\neth: fbnic: Avoid rounding zero ring sizes\n\nroundup_pow_of_two() is undefined for zero. ethtool permits a zero ring\nsize to reach the driver, where the minimum-size check should reject it.\n\nLeave zero unchanged while rounding nonzero ring sizes. The minimum-size\ncheck then rejects zero deterministically without changing the established\nbehavior for other values.\n\n## Affected\n\n- `Linux >= 6cbf18a05c06090d867ef417a2a30b214d42d171 < 92c9f2ea634d92adff5403d231ebeda683c5685a`\n- `Linux >= 6cbf18a05c06090d867ef417a2a30b214d42d171 < 491aa3167ae02f219cb2d2de6f4196d28dca03be`\n- `Linux >= 6cbf18a05c06090d867ef417a2a30b214d42d171 < 0160953d8eec75c3c55562158c46442ff1fd410b`\n- `Linux 6.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}