CVE-2026-98585

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98585", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.358Z", "datePublished": "2026-10-18T15:18:58.018Z", "dateUpdated": "2026-10-19T09:22:10.939Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:22:10.939Z"}, "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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c"], "versions": [{"version": "6cbf18a05c06090d867ef417a2a30b214d42d171", "lessThan": "92c9f2ea634d92adff5403d231ebeda683c5685a", "status": "affected", "versionType": "git"}, {"version": "6cbf18a05c06090d867ef417a2a30b214d42d171", "lessThan": "491aa3167ae02f219cb2d2de6f4196d28dca03be", "status": "affected", "versionType": "git"}, {"version": "6cbf18a05c06090d867ef417a2a30b214d42d171", "lessThan": "0160953d8eec75c3c55562158c46442ff1fd410b", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "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"}]}]}], "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"}], "title": "eth: fbnic: Avoid rounding zero ring sizes", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "92c9f2ea634d92adff5403d231ebeda683c5685a", "status": "affected", "version": "6cbf18a05c06090d867ef417a2a30b214d42d171", "versionType": "git"}, {"lessThan": "491aa3167ae02f219cb2d2de6f4196d28dca03be", "status": "affected", "version": "6cbf18a05c06090d867ef417a2a30b214d42d171", "versionType": "git"}, {"lessThan": "0160953d8eec75c3c55562158c46442ff1fd410b", "status": "affected", "version": "6cbf18a05c06090d867ef417a2a30b214d42d171", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/ethernet/meta/fbnic/fbnic_ethtool.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.15"}, {"lessThan": "6.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.55", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-98585", "lastModified": "2026-10-19T10:19:19.390", "metrics": {}, "published": "2026-10-18T16:17:11.083", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0160953d8eec75c3c55562158c46442ff1fd410b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/491aa3167ae02f219cb2d2de6f4196d28dca03be"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/92c9f2ea634d92adff5403d231ebeda683c5685a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: eth: fbnic: Avoid rounding zero ring sizes", "id": "2554997", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2554997"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1284", "details": ["In the Linux kernel, the following vulnerability has been resolved:\neth: fbnic: Avoid rounding zero ring sizes\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.\nLeave zero unchanged while rounding nonzero ring sizes. The minimum-size\ncheck then rejects zero deterministically without changing the established\nbehavior for other values.", "A flaw was found in the Linux kernel's fbnic network driver. A local user with administrative privileges could trigger a denial of service (DoS) and crash the system by configuring a network ring buffer size of zero. Because the driver fails to validate the input before executing a rounding calculation, processing a zero value causes an undefined operation."], "name": "CVE-2026-98585", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98585\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98585\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98585.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6cbf18a05c06090d867ef417a2a30b214d42d171,92c9f2ea634d92adff5403d231ebeda683c5685a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6cbf18a05c06090d867ef417a2a30b214d42d171,491aa3167ae02f219cb2d2de6f4196d28dca03be)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6cbf18a05c06090d867ef417a2a30b214d42d171,0160953d8eec75c3c55562158c46442ff1fd410b)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.55,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.9,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc5,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-10-18T18:00:10.133351+00:00", "updated": "2026-10-22T22:00:15.030872+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}