CVE-2021-47241

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Or with syzbot :)"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ethtool/strset.c"], "versions": [{"version": "71921690f9745fef60a2bad425f30adf8cdc9da0", "lessThan": "fb3a948143688e14e2cfd2a2812877923d0e5e92", "status": "affected", "versionType": "git"}, {"version": "71921690f9745fef60a2bad425f30adf8cdc9da0", "lessThan": "cfc7f0e70d649e6d2233fba0d9390b525677d971", "status": "affected", "versionType": "git"}, {"version": "71921690f9745fef60a2bad425f30adf8cdc9da0", "lessThan": "e175aef902697826d344ce3a12189329848fe898", "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/strset.c"], "versions": [{"version": "5.6", "status": "affected"}, {"version": "0", "lessThan": "5.6", "status": 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Or with syzbot :)"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.46", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.12.13", "versionStartIncluding": "5.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.13", "versionStartIncluding": "5.6"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-05-04T07:06:58.734Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47241", "state": "PUBLISHED", "dateUpdated": "2025-05-04T07:06:58.734Z", "dateReserved": "2024-04-10T18:59:19.532Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-05-21T14:19:41.009Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

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for.\nThis may result in ETHTOOL_MSG_STRSET_GET producing a warning like:\n\n calculated message payload length (684) not sufficient\n WARNING: CPU: 0 PID: 30967 at net/ethtool/netlink.c:369 ethnl_default_doit+0x87a/0xa20\n\nand a splat.\n\nAs usually with such warnings three conditions must be met for the warning\nto trigger:\n - there must be no skb size rounding up (e.g. reply_size of 684);\n - string set must be per-device (so that the header gets populated);\n - the device name must be at least 12 characters long.\n\nall in all with current user space it looks like reading priv flags\nis the only place this could potentially happen. Or with syzbot :)"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ethtool: strset: correcci\u00f3n del c\u00e1lculo de la longitud del mensaje. No se tiene en cuenta el nido externo para ETHTOOL_A_STRSET_STRINGSETS. Esto puede provocar que ETHTOOL_MSG_STRSET_GET produzca una advertencia como: la longitud calculada de el payload del mensaje (684) no es suficiente ADVERTENCIA: CPU: 0 PID: 30967 en net/ethtool/netlink.c:369 ethnl_default_doit+0x87a/0xa20 y un s\u00edmbolo. Como suele ocurrir con este tipo de advertencias, se deben cumplir tres condiciones para que se active la advertencia: - no debe haber ning\u00fan tama\u00f1o de skb redondeado hacia arriba (por ejemplo, tama\u00f1o_respuesta de 684); - el conjunto de cadenas debe ser por dispositivo (para que se complete el encabezado); - el nombre del dispositivo debe tener al menos 12 caracteres. Con todo, con el espacio de usuario actual, parece que leer indicadores privados es el \u00fanico lugar donde esto podr\u00eda suceder. O con syzbot :)"}], "id": "CVE-2021-47241", "lastModified": "2026-06-17T04:16:59.417", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47241", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-12T18:25:27.578860Z", "version": "2.0.3"}}]}, "published": "2024-05-21T15:15:13.250", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cfc7f0e70d649e6d2233fba0d9390b525677d971"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e175aef902697826d344ce3a12189329848fe898"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fb3a948143688e14e2cfd2a2812877923d0e5e92"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cfc7f0e70d649e6d2233fba0d9390b525677d971"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e175aef902697826d344ce3a12189329848fe898"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fb3a948143688e14e2cfd2a2812877923d0e5e92"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-266"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: ethtool: strset: fix message length calculation", "id": "2282575", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2282575"}, "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-99", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nethtool: strset: fix message length calculation\nOuter nest for ETHTOOL_A_STRSET_STRINGSETS is not accounted for.\nThis may result in ETHTOOL_MSG_STRSET_GET producing a warning like:\ncalculated message payload length (684) not sufficient\nWARNING: CPU: 0 PID: 30967 at net/ethtool/netlink.c:369 ethnl_default_doit+0x87a/0xa20\nand a splat.\nAs usually with such warnings three conditions must be met for the warning\nto trigger:\n- there must be no skb size rounding up (e.g. reply_size of 684);\n- string set must be per-device (so that the header gets populated);\n- the device name must be at least 12 characters long.\nall in all with current user space it looks like reading priv flags\nis the only place this could potentially happen. Or with syzbot :)"], "name": "CVE-2021-47241", "package_state": [{"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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-21T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47241\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47241\nhttps://lore.kernel.org/linux-cve-announce/2024052141-CVE-2021-47241-93cd@gregkh/T"], "threat_severity": "Low"}

{}