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vuln-cve/data/2026/98xxx/CVE-2026-98807.json
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{
"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"
}
]
}
]
}
],
"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",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}