CVE-2021-47158

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Add a cleanup path."}], "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 in the SJA1105 SPI DSA driver probe path (sja1105_probe \u2192 dsa_register_switch \u2192 sja1105_setup), not in packet processing; exploitation is local via driver (re)bind failure and subsequent access to the leftover /dev/ptpN device.\nAC:L - The error path is deterministic once static_config_load/clocking_setup/devlink_setup fails after PTP registration (e.g., -ENOMEM or SPI failure), and the resulting dangling PTP clock can be exercised reliably through standard PTP ioctls with no race beyond attacker influence.\nPR:L - On automotive/industrial SJA1105 systems, a mid-setup failure leaves a registered PTP clock after demv frees priv; an unprivileged local user who can open /dev/ptpN (ptp_open has no capability check) can then trigger the UAF without needing CAP_SYS_ADMIN.\nUI:N - No victim action is required; the attacker drives probe-failure conditions and/or opens the dangling PTP device and issues ioctls themselves.\nS:U - Impact is confined to kernel memory corruption within the same host kernel authority; this is not a VM escape, IOMMU bypass, or other cross-boundary break.\nC:H - After demv releases priv while ptp->info still points into it, PTP ioctls (e.g. GETCAPS/gettime) dereference freed ptp_clock_info, yielding a UAF that can be reclaimed and read for arbitrary kernel memory disclosure.\nI:H - The dangling ptp_clock_info holds function pointers (adjfine/gettimex64/settime64/etc.) in freed heap; heap reuse enables control-flow hijacking through those callbacks, so integrity impact is High.\nA:H - Use-after-free on the freed priv/ptp_data (and related timer/worker state) causes kernel oops/crash even without full exploitation, so availability impact is High."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/dsa/sja1105/sja1105_main.c"], "versions": [{"version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4", "lessThan": "dd8609f203448ca6d58ae71461208b3f6b0329b0", "status": "affected", "versionType": "git"}, {"version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4", "lessThan": "987e4ab8b8a4fcbf783069e03e7524cd39ffd563", "status": "affected", "versionType": "git"}, {"version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4", "lessThan": "cec279a898a3b004411682f212215ccaea1cd0fb", "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/dsa/sja1105/sja1105_main.c"], "versions": [{"version": "5.2", "status": "affected"}, {"version": "0", "lessThan": "5.2", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.42", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.12.9", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.13", "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": "5.2", "versionEndExcluding": "5.10.42"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.12.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"}, {"url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"}, {"url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"}], "title": "net: dsa: sja1105: add error handling in sja1105_setup()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.943Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47158", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:54:47.842191Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:55.376Z"}}]}}

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heap reuse enables control-flow hijacking through those callbacks, so integrity impact is High.\nA:H - Use-after-free on the freed priv/ptp_data (and related timer/worker state) causes kernel oops/crash even without full exploitation, so availability impact is High."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4", "lessThan": "dd8609f203448ca6d58ae71461208b3f6b0329b0", "versionType": "git"}, {"status": "affected", "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4", "lessThan": "987e4ab8b8a4fcbf783069e03e7524cd39ffd563", "versionType": "git"}, {"status": "affected", "version": "8aa9ebccae87621d997707e4f25e53fddd7e30e4", "lessThan": "cec279a898a3b004411682f212215ccaea1cd0fb", "versionType": "git"}], "programFiles": ["drivers/net/dsa/sja1105/sja1105_main.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.2"}, {"status": "unaffected", "version": "0", "lessThan": "5.2", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.42", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.12.9", "versionType": "semver", "lessThanOrEqual": "5.12.*"}, {"status": "unaffected", "version": "5.13", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/dsa/sja1105/sja1105_main.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"}, {"url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"}, {"url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: sja1105: add error handling in sja1105_setup()\n\nIf any of sja1105_static_config_load(), sja1105_clocking_setup() or\nsja1105_devlink_setup() fails, we can't just return in the middle of\nsja1105_setup() or memory will leak. 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Add a cleanup path."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: sja1105: agregue manejo de errores en sja1105_setup() Si alguno de sja1105_static_config_load(), sja1105_clocking_setup() o sja1105_devlink_setup() falla, no podemos simplemente regresar en el medio de sja1105_setup() o se perder\u00e1 memoria. Agregue una ruta de limpieza."}], "id": "CVE-2021-47158", "lastModified": "2026-08-04T10:16:49.340", "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"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47158", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:54:47.842191Z", "version": "2.0.3"}}]}, "published": "2024-03-25T10:15:07.707", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/987e4ab8b8a4fcbf783069e03e7524cd39ffd563"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cec279a898a3b004411682f212215ccaea1cd0fb"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dd8609f203448ca6d58ae71461208b3f6b0329b0"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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