{"id":"CVE-2026-98585","state":"PUBLISHED","title":"eth: fbnic: Avoid rounding zero ring sizes","description":"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 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.","publishedAt":"2026-10-18T15:18:58.018Z","updatedAt":"2026-10-19T09:22:10.939Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6cbf18a05c06090d867ef417a2a30b214d42d171","status":"affected","lessThan":"92c9f2ea634d92adff5403d231ebeda683c5685a","versionType":"git"},{"version":"6cbf18a05c06090d867ef417a2a30b214d42d171","status":"affected","lessThan":"491aa3167ae02f219cb2d2de6f4196d28dca03be","versionType":"git"},{"version":"6cbf18a05c06090d867ef417a2a30b214d42d171","status":"affected","lessThan":"0160953d8eec75c3c55562158c46442ff1fd410b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c"]}],"references":["https://git.kernel.org/stable/c/92c9f2ea634d92adff5403d231ebeda683c5685a","https://git.kernel.org/stable/c/491aa3167ae02f219cb2d2de6f4196d28dca03be","https://git.kernel.org/stable/c/0160953d8eec75c3c55562158c46442ff1fd410b"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98585.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98585","state":"PUBLISHED","datePublished":"2026-10-18T15:18:58.018Z","dateUpdated":"2026-10-19T09:22:10.939Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.358Z"},"containers":{"cna":{"title":"eth: fbnic: Avoid rounding zero ring sizes","descriptions":[{"lang":"en","value":"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 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6cbf18a05c06090d867ef417a2a30b214d42d171","status":"affected","lessThan":"92c9f2ea634d92adff5403d231ebeda683c5685a","versionType":"git"},{"version":"6cbf18a05c06090d867ef417a2a30b214d42d171","status":"affected","lessThan":"491aa3167ae02f219cb2d2de6f4196d28dca03be","versionType":"git"},{"version":"6cbf18a05c06090d867ef417a2a30b214d42d171","status":"affected","lessThan":"0160953d8eec75c3c55562158c46442ff1fd410b","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.15","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:22:10.939Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}