{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53398", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:54:09.738Z", "datePublished": "2025-09-18T13:33:38.842Z", "dateUpdated": "2026-08-05T09:13:53.982Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:13:53.982Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmlx5: fix possible ptp queue fifo use-after-free\n\nFifo indexes are not checked during pop operations and it leads to\npotential use-after-free when poping from empty queue. Such case was\npossible during re-sync action. WARN_ON_ONCE covers future cases.\n\nThere were out-of-order cqe spotted which lead to drain of the queue and\nuse-after-free because of lack of fifo pointers check. Special check and\ncounter are added to avoid resync operation if SKB could not exist in the\nfifo because of OOO cqe (skb_id must be between consumer and producer\nindex)." } ], "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 in the mlx5 PTP TX port-timestamp completion path (NAPI → mlx5e_ptp_handle_ts_cqe → fifo pop), reached only by locally originated skbs with SKBTX_HW_TSTAMP classified as PTP (UDP/319 or ethertype 0x88F7). A remote peer cannot set those TX flags or inject the DMA'd CQEs the handler consumes.\nAC:L - An unprivileged local attacker fully controls the traffic that fills the PTP skb fifo and can burst PTP TX to provoke lost/out-of-order wire CQEs and the subsequent empty-fifo resync drain; the enabling tx_port_ts setting is routine in PTP deployments, not a rare config beyond attacker influence.\nPR:L - setsockopt(SO_TIMESTAMPING) with SOF_TIMESTAMPING_TX_HARDWARE and sending UDP to port 319 need no capabilities, and mlx5e_use_ptpsq() gates only on skb tx_flags and packet type—so any unprivileged local user can drive the vulnerable path once the interface is in normal PTP TX-port-TS configuration.\nUI:N - The attacker’s own packet transmissions and the resulting TS-CQE/NAPI processing trigger the empty-fifo pop and UAF with no action required from another user or administrator.\nS:U - Impact is confined to kernel heap objects (sk_buffs and the driver’s skb fifo) in the same kernel security authority, with no VM, IOMMU, or sandbox boundary crossed.\nC:H - Popping an empty/stale fifo slot yields a use-after-free of sk_buff: mlx5e_skb_cb_get_hwts()/skb_tstamp_tx() read and clone freed slab memory onto a socket error queue, enabling heap disclosure via spraying.\nI:H - The same UAF leads to napi_consume_skb() on a freed (or reallocated) sk_buff, causing double-free/refcount underflow and writes into freed skb->cb via mlx5e_skb_cb_hwtstamp_handler—heap corruption primitives suitable for control-flow hijack.\nA:H - Empty-fifo pops dereference NULL/stale pointers and double-free sk_buffs in softirq/NAPI context, producing kernel oopses/BUGs (and WARN_ON_ONCE under panic_on_warn) that take down the host." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/mellanox/mlx5/core/en/ptp.c", "drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h", "drivers/net/ethernet/mellanox/mlx5/core/en_stats.c", "drivers/net/ethernet/mellanox/mlx5/core/en_stats.h" ], "versions": [ { "version": "58a518948f60153e8f6cb8361d2712aa3a1af94a", "lessThan": "52e6e7a0bc04c85012a9251c7cf2d444a77eb966", "status": "affected", "versionType": "git" }, { "version": "58a518948f60153e8f6cb8361d2712aa3a1af94a", "lessThan": "6afdedc4e66e3846ce497744f01b95c34bf39d21", "status": "affected", "versionType": "git" }, { "version": "58a518948f60153e8f6cb8361d2712aa3a1af94a", "lessThan": "3a50cf1e8e5157b82268eee7e330dbe5736a0948", "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/ethernet/mellanox/mlx5/core/en/ptp.c", "drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h", "drivers/net/ethernet/mellanox/mlx5/core/en_stats.c", "drivers/net/ethernet/mellanox/mlx5/core/en_stats.h" ], "versions": [ { "version": "6.0", "status": "affected" }, { "version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.18", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2.5", "lessThanOrEqual": "6.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3", "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": "6.0", "versionEndExcluding": "6.1.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.2.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/52e6e7a0bc04c85012a9251c7cf2d444a77eb966" }, { "url": "https://git.kernel.org/stable/c/6afdedc4e66e3846ce497744f01b95c34bf39d21" }, { "url": "https://git.kernel.org/stable/c/3a50cf1e8e5157b82268eee7e330dbe5736a0948" } ], "title": "mlx5: fix possible ptp queue fifo use-after-free", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2023-53398", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2026-01-14T19:00:48.835326Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T19:03:06.499Z" } } ] } }