CVE-2023-52509

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Otherwise,\nravb_tx_timeout_work() is possible to use the freed priv after\nravb_remove() was called like below:\n\nCPU0\t\t\tCPU1\n\t\t\travb_tx_timeout()\nravb_remove()\nunregister_netdev()\nfree_netdev(ndev)\n// free priv\n\t\t\travb_tx_timeout_work()\n\t\t\t// use priv\n\nunregister_netdev() will call .ndo_stop() so that ravb_stop() is\ncalled. And, after phy_stop() is called, netif_carrier_off()\nis also called. So that .ndo_tx_timeout() will not be called\nafter phy_stop()."}], "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 UAF is triggered when local teardown (ravb_close via ip link down, system suspend, or ravb_remove/unbind) races with locally scheduled ravb_tx_timeout_work; remote packets alone cannot free priv or cancel the work.\nAC:L - Once TX-timeout work is queued, the attacker (or routine automotive autosuspend) fully controls when close/remove runs, and ravb_stop_dma inside the worker creates a wide, repeatable window overlapping teardown without relying on an uncontrolled memory layout.\nPR:L - On Renesas R-Car embedded/automotive deployments, ordinary socket traffic arms the timeout path and system autosleep/idle suspend invokes ravb_close without CAP_NET_ADMIN; the same close-vs-work UAF needs no platform unbind/root, matching the CVE-2025-21801 ravb scoring precedent.\nUI:N - Traffic generation and interface/suspend teardown are driven by the attacker or by automatic power-management on the affected platforms; no separate victim user action is required.\nS:U - The use-after-free corrupts host-kernel heap/DMA objects (ravb_private, descriptor rings) within a single kernel security authority and does not cross a VM, IOMMU, or sandbox boundary.\nC:H - ravb_tx_timeout_work continues to dereference priv and ring/skb pointers after free_netdev or ravb_ring_free, so reclaiming those slabs yields an arbitrary kernel-memory read primitive.\nI:H - The same UAF/double-free path re-enters ravb_ring_free/ravb_dmac_init on attacker-reclaimable objects (including work_struct and DMA state), enabling heap corruption and control-flow hijacking.\nA:H - Use-after-free of priv or double-free of DMA rings causes kernel oops/panic and takes down the primary Ethernet interface, as is typical for this race class."}]}], "affected": 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Otherwise,\nravb_tx_timeout_work() is possible to use the freed priv after\nravb_remove() was called like below:\n\nCPU0\t\t\tCPU1\n\t\t\travb_tx_timeout()\nravb_remove()\nunregister_netdev()\nfree_netdev(ndev)\n// free priv\n\t\t\travb_tx_timeout_work()\n\t\t\t// use priv\n\nunregister_netdev() will call .ndo_stop() so that ravb_stop() is\ncalled. And, after phy_stop() is called, netif_carrier_off()\nis also called. So that .ndo_tx_timeout() will not be called\nafter phy_stop()."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ravb: soluciona el problema de Use After Free en ravb_tx_timeout_work(). Ravb_stop() deber\u00eda llamar a cancel_work_sync(). De lo contrario, ravb_tx_timeout_work() es posible usar el privilegio liberado despu\u00e9s de que se llam\u00f3 a ravb_remove() como se muestra a continuaci\u00f3n: CPU0 CPU1 ravb_tx_timeout() ravb_remove() unregister_netdev() free_netdev(ndev) // priv libre ravb_tx_timeout_work() // usa priv unregister_netdev() llamar\u00e1 a .ndo_stop() para que se llame a ravb_stop(). Y, despu\u00e9s de llamar a phy_stop(), tambi\u00e9n se llama a netif_carrier_off(). De modo que .ndo_tx_timeout() no ser\u00e1 llamado despu\u00e9s de phy_stop()."}], "id": "CVE-2023-52509", "lastModified": "2026-08-04T10:18:30.977", "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": 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": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-52509", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-07-24T20:38:43.674426Z", "version": "2.0.3"}}]}, "published": "2024-03-02T22:15:47.540", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/105abd68ad8f781985113aee2e92e0702b133705"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3971442870713de527684398416970cf025b4f89"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/616761cf9df9af838c0a1a1232a69322a9eb67e6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65d34cfd4e347054eb4193bc95d9da7eaa72dee5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f6fa8061f756aedb93af12a8a5d3cf659127965"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/db9aafa19547833240f58c2998aed7baf414dc82"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/105abd68ad8f781985113aee2e92e0702b133705"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3971442870713de527684398416970cf025b4f89"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/616761cf9df9af838c0a1a1232a69322a9eb67e6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/65d34cfd4e347054eb4193bc95d9da7eaa72dee5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6f6fa8061f756aedb93af12a8a5d3cf659127965"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/db9aafa19547833240f58c2998aed7baf414dc82"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ravb: Fix use-after-free issue in ravb_tx_timeout_work()", "id": "2267774", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2267774"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nravb: Fix use-after-free issue in ravb_tx_timeout_work()\nThe ravb_stop() should call cancel_work_sync(). Otherwise,\nravb_tx_timeout_work() is possible to use the freed priv after\nravb_remove() was called like below:\nCPU0CPU1\nravb_tx_timeout()\nravb_remove()\nunregister_netdev()\nfree_netdev(ndev)\n// free priv\nravb_tx_timeout_work()\n// use priv\nunregister_netdev() will call .ndo_stop() so that ravb_stop() is\ncalled. And, after phy_stop() is called, netif_carrier_off()\nis also called. So that .ndo_tx_timeout() will not be called\nafter phy_stop()."], "name": "CVE-2023-52509", "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": "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"}], "public_date": "2024-03-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52509\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52509\nhttps://lore.kernel.org/linux-cve-announce/2024030250-CVE-2023-52509-997c@gregkh/T/#u"], "threat_severity": "Low"}

{}