{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63987", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.025Z", "datePublished": "2026-07-19T14:56:08.940Z", "dateUpdated": "2026-08-05T12:37:54.593Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:37:54.593Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES\n\nethnl_update_profile() walks the ETHTOOL_A_PROFILE_IRQ_MODERATION\nnest list with an index 'i' and writes new_profile[i++] without\nbounding i. The destination is kmemdup()'d at NET_DIM_PARAMS_NUM_PROFILES\nentries (5), but the Netlink nest count is entirely user-controlled.\nNetlink policies do not have support for constraining the number\nof nested entries (or number of multi-attr entries)."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached only through the ETHTOOL_MSG_COALESCE_SET generic-netlink ioctl path (ethnl_default_set_doit \u2192 ethnl_set_coalesce \u2192 ethnl_update_profile), not via remote network packets or physical bus access.\nAC:L - An attacker with CAP_NET_ADMIN can send a crafted netlink message with more than five nested ETHTOOL_A_PROFILE_IRQ_MODERATION attributes and deterministically trigger a heap buffer overflow past the five-entry kmemdup buffer.\nPR:L - ETHTOOL_MSG_COALESCE_SET is gated by GENL_UNS_ADMIN_PERM, which requires CAP_NET_ADMIN in the socket's network namespace user namespace; this capability is obtainable by an unprivileged user via user namespaces (unshare -Urn) or containers granted NET_ADMIN (e.g., hostNetwork pods).\nUI:N - Exploitation requires only the attacker's own ethtool netlink SET_COALESCE request with a malformed profile nest; no action by another user or victim is needed.\nS:U - The vulnerability corrupts kernel heap memory within the same kernel security domain; it does not by itself cross a VM, container, or IOMMU boundary to affect a separate security authority.\nC:H - The out-of-bounds writes past the 120-byte (5 \u00d7 24-byte dim_cq_moder) kmalloc allocation can corrupt adjacent slab objects, providing a standard heap-corruption primitive that can be leveraged for arbitrary kernel memory disclosure.\nI:H - The attacker fully controls the overflowed u16 profile fields (usec, pkts, comps) written beyond the allocation boundary, enabling heap metadata or adjacent-object corruption that can be developed into arbitrary kernel write or code execution.\nA:H - Heap corruption from unbounded profile indexing can cause immediate kernel oops/panic during the write or when the corrupted profile is subsequently used by DIM/virtio-net interrupt moderation paths."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ethtool/coalesce.c"], "versions": [{"version": "f750dfe825b904164688adeb147950e0e0c4d262", "lessThan": "d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc", "status": "affected", "versionType": "git"}, {"version": "f750dfe825b904164688adeb147950e0e0c4d262", "lessThan": "0c02c190bcd9822477038ff2cee10ea584ac1b1d", "status": "affected", "versionType": "git"}, {"version": "f750dfe825b904164688adeb147950e0e0c4d262", "lessThan": "6205f7166d2dd14a017a5802c81e5bd1421a8635", "status": "affected", "versionType": "git"}, {"version": "f750dfe825b904164688adeb147950e0e0c4d262", "lessThan": "7281b096b072f6c6e30420e3467d738f2e4c4b57", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ethtool/coalesce.c"], "versions": [{"version": "6.11", "status": "affected"}, {"version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.93", "lessThanOrEqual": "6.12.*", "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": "6.11", "versionEndExcluding": "6.12.93"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.18.35"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.0.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc"}, {"url": "https://git.kernel.org/stable/c/0c02c190bcd9822477038ff2cee10ea584ac1b1d"}, {"url": "https://git.kernel.org/stable/c/6205f7166d2dd14a017a5802c81e5bd1421a8635"}, {"url": "https://git.kernel.org/stable/c/7281b096b072f6c6e30420e3467d738f2e4c4b57"}], "title": "ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/ethtool/coalesce.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc", "status": "affected", "version": "f750dfe825b904164688adeb147950e0e0c4d262", "versionType": "git"}, {"lessThan": "0c02c190bcd9822477038ff2cee10ea584ac1b1d", "status": "affected", "version": "f750dfe825b904164688adeb147950e0e0c4d262", "versionType": "git"}, {"lessThan": "6205f7166d2dd14a017a5802c81e5bd1421a8635", "status": "affected", "version": "f750dfe825b904164688adeb147950e0e0c4d262", "versionType": "git"}, {"lessThan": "7281b096b072f6c6e30420e3467d738f2e4c4b57", "status": "affected", "version": "f750dfe825b904164688adeb147950e0e0c4d262", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/ethtool/coalesce.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"lessThan": "6.11", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.93", "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"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "424D443C-A075-4671-94EC-F9F3E489E267", "versionEndExcluding": "6.12.93", "versionStartIncluding": "6.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0FCCB23A-7629-4386-93B6-B119237C4382", "versionEndExcluding": "6.18.35", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9161A938-0FA8-44BC-95FE-C5A271601AB3", "versionEndExcluding": "7.0.12", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*", "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*", "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*", "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*", "matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*", "matchCriteriaId": "81DFF19E-9CF8-49C6-8C36-1E4038622933", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES\n\nethnl_update_profile() walks the ETHTOOL_A_PROFILE_IRQ_MODERATION\nnest list with an index 'i' and writes new_profile[i++] without\nbounding i. The destination is kmemdup()'d at NET_DIM_PARAMS_NUM_PROFILES\nentries (5), but the Netlink nest count is entirely user-controlled.\nNetlink policies do not have support for constraining the number\nof nested entries (or number of multi-attr entries)."}], "id": "CVE-2026-63987", "lastModified": "2026-10-08T14:46:43.050", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-07-19T16:17:17.953", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0c02c190bcd9822477038ff2cee10ea584ac1b1d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6205f7166d2dd14a017a5802c81e5bd1421a8635"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7281b096b072f6c6e30420e3467d738f2e4c4b57"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES", "id": "2502409", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502409"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nethtool: coalesce: cap profile updates at NET_DIM_PARAMS_NUM_PROFILES\nethnl_update_profile() walks the ETHTOOL_A_PROFILE_IRQ_MODERATION\nnest list with an index 'i' and writes new_profile[i++] without\nbounding i. The destination is kmemdup()'d at NET_DIM_PARAMS_NUM_PROFILES\nentries (5), but the Netlink nest count is entirely user-controlled.\nNetlink policies do not have support for constraining the number\nof nested entries (or number of multi-attr entries).", "A flaw was found in the Linux kernel's ethtool subsystem. The ethnl_update_profile() function, responsible for updating profile settings, does not properly validate user-controlled input when processing Netlink nest lists. This allows a local attacker to cause an out-of-bounds write, potentially leading to a denial of service or other memory corruption issues."], "name": "CVE-2026-63987", "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63987\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63987\nhttps://lore.kernel.org/linux-cve-announce/2026071903-CVE-2026-63987-bda5@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f750dfe825b904164688adeb147950e0e0c4d262,d4c9cc7c47781c6f4fa29d80a1193a8bcd1525bc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f750dfe825b904164688adeb147950e0e0c4d262,0c02c190bcd9822477038ff2cee10ea584ac1b1d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f750dfe825b904164688adeb147950e0e0c4d262,6205f7166d2dd14a017a5802c81e5bd1421a8635)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f750dfe825b904164688adeb147950e0e0c4d262,7281b096b072f6c6e30420e3467d738f2e4c4b57)"}}], "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": "calver", "value": "6.11"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.11)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.93,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.35,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.12,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-21T07:45:03.517507+00:00", "updated": "2026-10-08T00:00:14.800276+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}