{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98807",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.371Z",
        "datePublished": "2026-10-18T15:48:53.992Z",
        "dateUpdated": "2026-10-19T09:26:00.670Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:26:00.670Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Fix slab-out-of-bounds when handling team device events\n\nThe mlx5_handle_changeupper_event() and mlx5_handle_changeinfodata_event()\nfunctions check for LAG masters (which includes both bonding and team\ndevices) but only call bonding-specific APIs. When processing team device\nevents, calling bond_slave_get_rcu() and bond_is_slave_inactive() on\nteam_port structures causes KASAN to detect an out-of-bounds memory access\nsince team_port is smaller than bond slave.\n\nFix this by wrapping the bond-specific API calls with a check for bonding\ndevices. This allows the function to still process LAG events for both\nbonding and teams but only calls bond-specific functions when dealing with\nactual bonding devices.\n\nFor mlx5_handle_changeinfodata_event(), keep the explicit bond check as\nmlx5 doesn't handle state information for team ports anyway.\n\nTested with Mellanox ConnectX-5 on Linux 7.2.0-rc6:\n- Bonding: PASS (no regressions)\n- Team device: PASS (no KASAN 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/lag/lag.c"
                    ],
                    "versions": [
                        {
                            "version": "54493a08e21f46446b3b24577c5a6f229d049757",
                            "lessThan": "16ca0e79f31ea810346a79dda545ba344ede1d47",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "54493a08e21f46446b3b24577c5a6f229d049757",
                            "lessThan": "3a6e67ff267af2053a793825c3b7844741fed461",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "54493a08e21f46446b3b24577c5a6f229d049757",
                            "lessThan": "8117cbc504cb01980258d8a8c9be8f57cf0aaceb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "54493a08e21f46446b3b24577c5a6f229d049757",
                            "lessThan": "04c824940d52871c49866a4ac67b504146f7cf35",
                            "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/lag/lag.c"
                    ],
                    "versions": [
                        {
                            "version": "5.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.113",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.56",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.10",
                            "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": "5.18",
                                    "versionEndExcluding": "6.12.113"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "6.18.56"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "7.2.10"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.18",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
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                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/16ca0e79f31ea810346a79dda545ba344ede1d47"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3a6e67ff267af2053a793825c3b7844741fed461"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8117cbc504cb01980258d8a8c9be8f57cf0aaceb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/04c824940d52871c49866a4ac67b504146f7cf35"
                }
            ],
            "title": "net/mlx5: Fix slab-out-of-bounds when handling team device events",
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}