CVE-2024-35834

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AF_XDP zero-copy data planes (cloud load balancers, 5G UPF, DPDK-style userspace networking) are by definition internet-facing.\nAC:L - The attacker fully controls the trigger by sending traffic faster than the application consumes it; there is no race to win and no memory-layout dependency, and `XDP_USE_NEED_WAKEUP` (which makes the ice/i40e drivers take the `XDP_EXIT` path that also skips the free) is the libbpf/xdpsock default. Every `-ENOBUFS` event leaks a buffer, so a flood drains the fixed-size umem pool deterministically.\nPR:N - No credentials or local account are needed \u2014 the attacker only has to send packets to the interface, and the entire path runs in the driver NAPI/XDP receive context before any authentication or authorization exists.\nUI:N - The leak occurs automatically during packet reception in the driver's NAPI poll; no action by any local user or administrator is required beyond the AF_XDP application already running.\nS:U - The leaked buffers and the resulting resource exhaustion are confined to the kernel's XSK buffer pool and the host's network stack, with no crossing into a hypervisor, IOMMU, or other security authority.\nC:N - There is no out-of-bounds read, uninitialized-memory read, or use-after-free; the stale `xskb_list` fragments that get mis-delivered contain packet data that was already destined for that same socket's umem, so no kernel memory or cross-boundary data is disclosed.\nI:L - Fragments left on the shared `pool->xskb_list` are produced as descriptors for a subsequent, unrelated frame, and the already-reserved `XDP_PKT_CONTD` descriptors desynchronize reassembly, so the attacker can cause corrupted, mis-assembled packet data to be delivered to the userspace application. This is bounded data corruption on the receive path, not an arbitrary write or control-flow hijack.\nA:H - Each Rx-full event permanently removes a chunk from the fixed-size, non-replenishable XSK buffer pool; a sustained flood drains it entirely, after which `xp_alloc_batch()` returns nothing, the Rx ring cannot be refilled, and packet reception on that queue ceases while `ice_clean_rx_irq_zc()` keeps returning `budget` and re-arming NAPI. 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This is bounded data corruption on the receive path, not an arbitrary write or control-flow hijack.\nA:H - Each Rx-full event permanently removes a chunk from the fixed-size, non-replenishable XSK buffer pool; a sustained flood drains it entirely, after which `xp_alloc_batch()` returns nothing, the Rx ring cannot be refilled, and packet reception on that queue ceases while `ice_clean_rx_irq_zc()` keeps returning `budget` and re-arming NAPI. 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Agregue la llamada xsk_buff_free() faltante cuando __xsk_rcv_zc() falla al generar un descriptor en la cola XSK Rx."}], "id": "CVE-2024-35834", "lastModified": "2026-08-04T11:17:57.270", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "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-2024-35834", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-06-12T15:14:57.887303Z", "version": "2.0.3"}}]}, "published": "2024-05-17T14:15:20.160", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/269009893146c495f41e9572dd9319e787c2eba9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7b4d93d31aade99210d41cd9d4cbd2957c98bc8c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cce713664548284daf977739e7ff1cd59e84189c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/269009893146c495f41e9572dd9319e787c2eba9"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7b4d93d31aade99210d41cd9d4cbd2957c98bc8c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cce713664548284daf977739e7ff1cd59e84189c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: xsk: recycle buffer in case Rx queue was full", "id": "2281167", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281167"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nxsk: recycle buffer in case Rx queue was full\nAdd missing xsk_buff_free() call when __xsk_rcv_zc() failed to produce\ndescriptor to XSK Rx queue."], "name": "CVE-2024-35834", "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": "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": "2024-05-17T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-35834\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-35834\nhttps://lore.kernel.org/linux-cve-announce/2024051730-CVE-2024-35834-2378@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-07-13T11:31:04.966766+00:00", "updated": "2025-07-13T11:31:04.966819+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}