{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63999", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.026Z", "datePublished": "2026-07-19T14:56:17.383Z", "dateUpdated": "2026-07-19T14:56:17.383Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T14:56:17.383Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nethtool: rss: fix indir_table and hkey leak on get_rxfh failure\n\nrss_prepare_get() allocates the indirection table and hash key buffer\nvia rss_get_data_alloc(), then calls ops->get_rxfh() to populate them.\nIf get_rxfh() fails, the function returns an error without freeing\nthe allocation."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": 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"0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ethtool/rss.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "33d05c22d6f227c5ae171c46df2f6f8bf48047ea", "status": "affected", "version": "4f038a6a02d20859a3479293cbf172b0f14cbdd6", "versionType": "git"}, {"lessThan": "80d95d92f828cfcace955d673637d944178b435f", "status": "affected", "version": "4f038a6a02d20859a3479293cbf172b0f14cbdd6", "versionType": "git"}, {"lessThan": "266297692f97008ca48bc311775c087c59bd7fe3", "status": "affected", "version": "4f038a6a02d20859a3479293cbf172b0f14cbdd6", "versionType": "git"}, {"status": "affected", "version": "81a5174e64ce4fb7b7a2f6499b835c904c9451ee", "versionType": "git"}, {"status": "affected", "version": "ec9faff49a4ea27731de39cb887b7e590e93157b", "versionType": "git"}, {"status": "affected", "version": "c5ed0eaddcbda56079091fc3876b140a6e70a548", "versionType": "git"}, {"status": "affected", "version": "a065b996052656a65afc51ad82336dc55ae4c72f", "versionType": "git"}, {"status": "affected", "version": "adee9db710a6117b978a25ed4153846b7c56ec9a", "versionType": "git"}, {"status": "affected", "version": "5eb3fdc4b6281b29e830300c866a36d90442b1f0", "versionType": "git"}, {"lessThan": "5.16", "status": "affected", "version": "5.15.181", "versionType": "semver"}, {"lessThan": "6.2", "status": "affected", "version": "6.1.135", "versionType": "semver"}, {"lessThan": "6.7", "status": "affected", "version": "6.6.88", "versionType": "semver"}, {"lessThan": "6.13", "status": "affected", "version": "6.12.24", "versionType": "semver"}, {"lessThan": "6.14", "status": "affected", "version": "6.13.12", "versionType": "semver"}, {"lessThan": "6.15", "status": "affected", "version": "6.14.3", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ethtool/rss.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": "6.18.35", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.12", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "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\nethtool: rss: fix indir_table and hkey leak on get_rxfh failure\n\nrss_prepare_get() allocates the indirection table and hash key buffer\nvia rss_get_data_alloc(), then calls ops->get_rxfh() to populate them.\nIf get_rxfh() fails, the function returns an error without freeing\nthe allocation."}], "id": "CVE-2026-63999", "lastModified": "2026-07-30T14:51:11.223", "metrics": {}, "published": "2026-07-19T16:17:39.477", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/266297692f97008ca48bc311775c087c59bd7fe3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/33d05c22d6f227c5ae171c46df2f6f8bf48047ea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/80d95d92f828cfcace955d673637d944178b435f"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: ethtool: rss: fix indir_table and hkey leak on get_rxfh failure", "id": "2502445", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502445"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-772", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nethtool: rss: fix indir_table and hkey leak on get_rxfh failure\nrss_prepare_get() allocates the indirection table and hash key buffer\nvia rss_get_data_alloc(), then calls ops->get_rxfh() to populate them.\nIf get_rxfh() fails, the function returns an error without freeing\nthe allocation.", "A flaw was found in the Linux kernel's ethtool subsystem, specifically within the Receive Side Scaling (RSS) functionality. The rss_prepare_get() function fails to deallocate memory for the indirection table and hash key buffer if an internal operation (ops->get_rxfh()) does not complete successfully. This memory leak can be exploited by a local attacker, potentially leading to a Denial of Service (DoS) due to resource exhaustion over time."], "name": "CVE-2026-63999", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63999\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63999\nhttps://lore.kernel.org/linux-cve-announce/2026071906-CVE-2026-63999-6f50@gregkh/T"], "threat_severity": "Low"}