{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43031",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:55.977Z",
        "datePublished": "2026-05-01T14:15:31.256Z",
        "dateUpdated": "2026-08-05T12:25:24.979Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:25:24.979Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: xilinx: axienet: Fix BQL accounting for multi-BD TX packets\n\nWhen a TX packet spans multiple buffer descriptors (scatter-gather),\naxienet_free_tx_chain sums the per-BD actual length from descriptor\nstatus into a caller-provided accumulator. That sum is reset on each\nNAPI poll. If the BDs for a single packet complete across different\npolls, the earlier bytes are lost and never credited to BQL. This\ncauses BQL to think bytes are permanently in-flight, eventually\nstalling the TX queue.\n\nThe SKB pointer is stored only on the last BD of a packet. When that\nBD completes, use skb->len for the byte count instead of summing\nper-BD status lengths. This matches netdev_sent_queue(), which debits\nskb->len, and naturally survives across polls because no partial\npacket contributes to the accumulator."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                        "baseScore": 7.5,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - The vulnerable cleanup runs on transmitted packets for a network interface; in a reasonable embedded/router/server deployment, an unauthenticated remote peer can cause multi-fragment replies or forwarded traffic to be transmitted through the affected axienet device.\nAC:L - The trigger is repeated multi-BD scatter-gather TX completion with descriptors split across NAPI polls, which can be induced through sustained traffic and does not require winning an attacker-uncontrolled race.\nPR:N - No local privileges are needed in the network-triggered scenario because packets from a remote peer can cause the host or forwarding device to transmit through the affected interface.\nUI:N - Once the affected interface is up and carrying traffic, exploitation does not require any user action by a victim.\nS:U - The impact remains within the kernel/network device availability scope and does not cross a virtualization, sandbox, or separate security authority boundary.\nC:N - The bug is an accounting mismatch in BQL byte completion reporting; it does not expose memory contents or create a read primitive.\nI:N - The vulnerable path does not corrupt memory or attacker-controlled data; it under-credits completed TX bytes and affects queue state only.\nA:H - Repeated under-accounting makes BQL believe bytes remain permanently in flight, eventually stalling the TX queue and causing a persistent denial of transmit service on the affected network interface."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/xilinx/xilinx_axienet_main.c"
                    ],
                    "versions": [
                        {
                            "version": "c900e49d58eb32b192b6d200ace4ae3ab89779d4",
                            "lessThan": "2a0323a913109b52bfc9f5ea7b92a1b249e07d3e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c900e49d58eb32b192b6d200ace4ae3ab89779d4",
                            "lessThan": "3c3a6b9020c01fde7b22e8550105de0b59904f61",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c900e49d58eb32b192b6d200ace4ae3ab89779d4",
                            "lessThan": "d1978d03e86785872871bff9c2623174b10740de",
                            "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/xilinx/xilinx_axienet_main.c"
                    ],
                    "versions": [
                        {
                            "version": "6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.22",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.12",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "6.15",
                                    "versionEndExcluding": "6.18.22"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "6.19.12"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/2a0323a913109b52bfc9f5ea7b92a1b249e07d3e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3c3a6b9020c01fde7b22e8550105de0b59904f61"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d1978d03e86785872871bff9c2623174b10740de"
                }
            ],
            "title": "net: xilinx: axienet: Fix BQL accounting for multi-BD TX packets",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}