{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97570",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-24T16:01:01.155Z",
        "datePublished": "2026-09-25T10:21:55.604Z",
        "dateUpdated": "2026-09-25T14:41:16.080Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-09-25T14:41:16.080Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbnxt_en: Bound SW TPA IDs to prevent crashes\n\nFW supports up to 1024 concurrent TPAs, so the FW TPA ID is in the range\n0..1023 (see commit ec4d8e7cf024 (\"bnxt_en: Add TPA ID mapping logic for\n57500 chips.\")). bnxt_alloc_agg_idx is intended to wrap the FW ID down to a\nsoftware ID which is used to index rxr->rx_tpa, and to generate a mapping\nbetween FW IDs and the wrapped software ID.\n\nOn a 57608 with firmware version 233, the firmware advertises 32\nconcurrent TPAs. As of the commit under fixes, bp->max_tpa on this NIC\nis set to 32.\n\nIf the software ID from bnxt_alloc_agg_idx is above 31, this results in\nan invalid address being loaded on this line:\n\n  tpa_info = &rxr->rx_tpa[agg_id];\n\nbecause rx_tpa is allocated with only bp->max_tpa (32) entries. Writes\nto tpa_info later in the code are out of bounds.\n\nThis bug results in a crash at boot:\n\nOops: general protection fault, kernel NULL pointer dereference 0x8: 0000 [#1] SMP NOPTI\nRIP: 0010:bnxt_rx_pkt+0xc0/0x1560\nRSP: 0018:ffffc900009b8c78 EFLAGS: 00010246\nRAX: 0000000000000000 RBX: 0000000000000048 RCX: 0000000206682516\nRDX: ffffc900009b8db4 RSI: 0000000000000000 RDI: 01ffffff038fe1c0\nRBP: ffffc9006e687480 R08: ffffc9006e687000 R09: 0000000000003048\nR10: 0000000000000480 R11: ffff8881c6083900 R12: 0000000006682516\nR13: ffff8881c6095400 R14: 0000000000000016 R15: ffff8881c6b66680\nFS:  0000000000000000(0000) GS:ffff88fef3c77000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fc8bda40584 CR3: 000000807c812001 CR4: 0000000008772ef0\nPKRU: 55555554\nCall Trace:\n <IRQ>\n ? __netif_receive_skb_list_core+0x1ca/0x250\n __bnxt_poll_work+0x152/0x280\n bnxt_poll_p5+0x1cd/0x480\n __napi_poll+0x30/0x180\n net_rx_action+0x20b/0x3b0\n ? note_gp_changes+0x53/0xe0\n ? tick_setup_sched_timer+0x180/0x180\n ? __napi_schedule+0x9a/0xb0\n ? bnxt_msix+0x24/0x30\n handle_softirqs+0xdd/0x2c0\n __irq_exit_rcu.llvm.3171231171502365008+0x47/0xf0\n common_interrupt+0x85/0x90\n </IRQ>\n <TASK>\n asm_common_interrupt+0x22/0x40\n\nThis stack trace is from a crash triggered when an out of bounds rx_tpa\nis dereferenced. The invalid write mentioned above is silent in this\nparticular crash.\n\nFix this by allocating rx_tpa with bp->max_tpa rounded up to the next\npower of 2 (bp->max_tpa_roundup_size) entries and masking the FW TPA ID\nwith that size, so the wrapped ID can never index past the end of the\narray."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 8.1,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - bnxt_tpa_start() runs from bnxt_rx_pkt()/__bnxt_poll_work() in NAPI when the NIC opens a TPA aggregation for received TCP segments, so a remote sender of TCP traffic drives the out-of-bounds rx_tpa[agg_id] access with no local access needed.\nAC:H - It needs a P7 NIC (e.g. 57608) whose firmware advertises max_aggs_supported <= 32 so max_tpa stays small. The firmware, not the attacker, picks TPA_START_AGG_ID_P5; a masked ID of 32-255 then overruns rx_tpa. The attacker controls neither the hardware/firmware nor the ID choice.\nPR:N - The path runs in the RX softirq on arriving TCP segments before any socket or authentication processing, so the sender needs no credentials.\nUI:N - No victim action is needed; normal packet reception on the bnxt interface with hardware GRO/TPA enabled reaches bnxt_tpa_start().\nS:U - The corruption is in kernel heap memory next to the kzalloc'ed rx_tpa array in the same kernel authority; no guest/host or IOMMU boundary is shown to be crossed.\nC:H - bnxt_tpa_start() reads data/data_ptr/mapping from an out-of-bounds bnxt_tpa_info and posts that mapping to the RX descriptor (rx_bd_haddr), so stale heap contents get handed to the NIC and later to skb construction, exposing out-of-bounds kernel memory.\nI:H - It writes buffer pointers, the DMA mapping, and packet-derived len/rss_hash/flags2/hdr_info past the end of rx_tpa, and has the NIC DMA received packet bytes to a stale mapping read from out-of-bounds memory; this is heap memory corruption.\nA:H - The commit's reproduction shows a general protection fault oops in bnxt_rx_pkt in IRQ context during boot under normal RX traffic, which takes the machine down."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/broadcom/bnxt/bnxt.c",
                        "drivers/net/ethernet/broadcom/bnxt/bnxt.h"
                    ],
                    "versions": [
                        {
                            "version": "54c28fab2fa5afd681c9c4b10f4f6da1efdd397a",
                            "lessThan": "05cf64d171772c65bcdee76ee7163c35d9f55a89",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "54c28fab2fa5afd681c9c4b10f4f6da1efdd397a",
                            "lessThan": "c0aceaf65b70b3c000e70dd867f3a673015f24ca",
                            "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/broadcom/bnxt/bnxt.c",
                        "drivers/net/ethernet/broadcom/bnxt/bnxt.h"
                    ],
                    "versions": [
                        {
                            "version": "7.1",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "7.1",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3-rc3",
                            "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": "7.1",
                                    "versionEndExcluding": "7.2.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.1",
                                    "versionEndExcluding": "7.3-rc3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/05cf64d171772c65bcdee76ee7163c35d9f55a89"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c0aceaf65b70b3c000e70dd867f3a673015f24ca"
                }
            ],
            "title": "bnxt_en: Bound SW TPA IDs to prevent crashes",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}