{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-99079",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.389Z",
        "datePublished": "2026-10-23T12:23:26.458Z",
        "dateUpdated": "2026-10-23T12:23:26.458Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-23T12:23:26.458Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Prevent stale XSK buffer release on refill retry\n\nWhen an XDP redirect to an AF_XDP socket fails because its RX ring is\nfull, the XSK core frees the buffer. During the subsequent batched refill\nof a legacy cyclic RQ, mlx5e also releases the WQE's XSK buffer before\nallocating a replacement. If that refill succeeds only partially, a WQE\nleft without a replacement retains its old buffer pointer.\n\nThe buffer can meanwhile be allocated to another WQE. A later refill\nretry can then free the live buffer through the stale pointer and publish\nthe same UMEM frame twice.\n\nMark the WQE as released immediately after the driver-side free. The flag\nis already cleared when a replacement buffer is assigned, so refill\nretries no longer release stale pointers.\n\nThe failure is silent and produces no kernel warning or splat. A\nstandalone legacy cyclic-RQ zero-copy libxsk reproducer, using 64-byte UDP\ntraffic offered at 12 Mpps, detected it: stock stopped after 2,854,914\npackets in 4.094 seconds, with 4,542 xdp_rx_ring_full events and 64\nownership/double-publication errors. With this change it processed\n356,904,225 packets in 30 seconds despite 571,405 xdp_rx_ring_full events,\nwith no ownership or data errors."
                }
            ],
            "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_rx.c"
                    ],
                    "versions": [
                        {
                            "version": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
                            "lessThan": "32bbb870078d467479965c21bbc4960c57eea208",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
                            "lessThan": "34d1db2b18e1c1d189e34dd51923e031815f88e3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
                            "lessThan": "639522e5056cade578a324acfa993ec6c9f7f5dc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
                            "lessThan": "655f47477054d19de3b138840be229a1a4490d0c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "3f93f82988bc6b4104314bf9aa485d47fbb7e241",
                            "lessThan": "e01620844c5c88b6fcf819d171df8e3976a0e76f",
                            "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_rx.c"
                    ],
                    "versions": [
                        {
                            "version": "6.4",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.4",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.113",
                            "lessThanOrEqual": "6.12.*",
                            "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": "6.4",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.12.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "6.18.57"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "7.2.11"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.4",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/32bbb870078d467479965c21bbc4960c57eea208"
                },
                {
                    "url": "https://git.kernel.org/stable/c/34d1db2b18e1c1d189e34dd51923e031815f88e3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/639522e5056cade578a324acfa993ec6c9f7f5dc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/655f47477054d19de3b138840be229a1a4490d0c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e01620844c5c88b6fcf819d171df8e3976a0e76f"
                }
            ],
            "title": "net/mlx5e: Prevent stale XSK buffer release on refill retry",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}