{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-35834", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-05-17T13:50:33.103Z", "datePublished": "2024-05-17T14:02:19.184Z", "dateUpdated": "2026-08-05T11:30:12.321Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:30:12.321Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: recycle buffer in case Rx queue was full\n\nAdd missing xsk_buff_free() call when __xsk_rcv_zc() failed to produce\ndescriptor to XSK Rx queue." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "baseScore": 8.2, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The trigger condition — the AF_XDP Rx ring becoming full in `__xsk_rcv_zc()` — is produced purely by inbound network packets arriving faster than the userspace application drains the ring, so a remote attacker flooding the NIC bound to the zero-copy socket reaches the vulnerable path with no local access. 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 — 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. This is a complete, non-self-healing denial of service of the network data path requiring an application restart to recover." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/xdp/xsk.c" ], "versions": [ { "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9", "lessThan": "cce713664548284daf977739e7ff1cd59e84189c", "status": "affected", "versionType": "git" }, { "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9", "lessThan": "7b4d93d31aade99210d41cd9d4cbd2957c98bc8c", "status": "affected", "versionType": "git" }, { "version": "24ea50127ecf0efe819c1f6230add27abc6ca9d9", "lessThan": "269009893146c495f41e9572dd9319e787c2eba9", "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/xdp/xsk.c" ], "versions": [ { "version": "6.6", "status": "affected" }, { "version": "0", "lessThan": "6.6", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.15", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.3", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "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": "6.6", "versionEndExcluding": "6.6.15" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.7.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6", "versionEndExcluding": "6.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cce713664548284daf977739e7ff1cd59e84189c" }, { "url": "https://git.kernel.org/stable/c/7b4d93d31aade99210d41cd9d4cbd2957c98bc8c" }, { "url": "https://git.kernel.org/stable/c/269009893146c495f41e9572dd9319e787c2eba9" } ], "title": "xsk: recycle buffer in case Rx queue was full", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2024-06-12T15:14:57.887303Z", "id": "CVE-2024-35834", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-12T15:15:08.082Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T03:21:48.585Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/cce713664548284daf977739e7ff1cd59e84189c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/7b4d93d31aade99210d41cd9d4cbd2957c98bc8c", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/269009893146c495f41e9572dd9319e787c2eba9", "tags": [ "x_transferred" ] } ] } ] } }