{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99046",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.388Z",
        "datePublished": "2026-10-23T12:22:10.460Z",
        "dateUpdated": "2026-10-24T14:10:10.249Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-24T14:10:10.249Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ngve: fix XSK buffer leak on error descriptor\n\nWhen the error bit is set in the RX completion descriptor, the buf_state\nand its attached buffer should be freed. In the case of AF_XDP ZC, the\nXSK buffer was not freed, leading to a leak.\n\nThis issue was caught by LLM."
                }
            ],
            "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 - A malformed Ethernet/IP packet received by gVNIC produces a DQO completion whose rx_error field denotes an invalid packet; gve_intr_dqo() schedules gve_napi_poll_dqo(), which reaches the patched gve_rx_dqo() through gve_rx_poll_dqo().\nAC:L - With a DQO-RDA AF_XDP zero-copy queue active, the sender can repeatedly transmit packets classified by the device as invalid; gve_rx_dqo() then deterministically takes the rx_error branch without a race or memory-layout dependency.\nPR:N - The gve_rx_dqo() receive path performs no authentication or capability check; xsk_create()'s CAP_NET_RAW check and XDP attachment are victim-side service provisioning, while the remote sender needs only packet access.\nUI:N - After gve_reg_xsk_pool() activates the pool, gve_intr_dqo() and NAPI process each error completion automatically without any victim action.\nS:U - The leak affects the guest kernel's own GVE XSK pool and DQO receive queue; it neither bypasses an IOMMU nor crosses the guest/hypervisor boundary.\nC:N - The lost xdp_buff_xsk remains allocated but unreturned; the branch performs no out-of-bounds read or data return, and gve_alloc_buf_state() clears the stale pointer before reusing the state.\nI:N - In the vulnerable XSK case, gve_free_buffer() releases only page-pool state and the buf_state while leaving the XSK object allocated, causing resource loss without a dangling access, memory corruption, or unauthorized modification.\nA:H - Each error completion omits xsk_buff_free()/xp_free(), removing one frame from the fixed XSK pool; repetition makes xsk_buff_alloc() fail in gve_alloc_buffer(), prevents RX-buffer reposting, and can stop the bound receive queue until the pool or service is reset."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/ethernet/google/gve/gve_rx_dqo.c"
                    ],
                    "versions": [
                        {
                            "version": "c1fffc5d66a7147d557736c2341a511e0896d9ff",
                            "lessThan": "06656aaa7e43ae62b673c2244d27099b8b94a70d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c1fffc5d66a7147d557736c2341a511e0896d9ff",
                            "lessThan": "889f763874855c575429f75946132a53c573aa14",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c1fffc5d66a7147d557736c2341a511e0896d9ff",
                            "lessThan": "9fed6a8ab8a5bacba2c709cb19d2dd6d2fa9112e",
                            "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/google/gve/gve_rx_dqo.c"
                    ],
                    "versions": [
                        {
                            "version": "6.17",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.17",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.57",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.11",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "6.17",
                                    "versionEndExcluding": "6.18.57"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "7.2.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.17",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
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                    ]
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/06656aaa7e43ae62b673c2244d27099b8b94a70d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/889f763874855c575429f75946132a53c573aa14"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9fed6a8ab8a5bacba2c709cb19d2dd6d2fa9112e"
                }
            ],
            "title": "gve: fix XSK buffer leak on error descriptor",
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}