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vuln-cve/data/2026/72xxx/CVE-2026-72006.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-72006",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-08-09T03:40:39.899Z",
"datePublished": "2026-08-15T05:51:36.635Z",
"dateUpdated": "2026-08-17T05:06:27.714Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-08-17T05:06:27.714Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: free mlx5_st_idx_data on final dealloc\n\nWorkloads that repeatedly allocate and release mkeys carrying TPH\nsteering-tag hints (e.g. churning RDMA MRs) leak one\nstruct mlx5_st_idx_data per cycle; kmemleak flags it as unreferenced\nand the kmalloc slab grows over time.\n\nWhen the last reference to an ST table entry is dropped,\nmlx5_st_dealloc_index() removed the entry from idx_xa but the backing\nmlx5_st_idx_data allocation was never freed.\n\nFree idx_data after the xa_erase() so the lifetime of the bookkeeping\nstruct matches the lifetime of the ST entry it tracks."
}
],
"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/lib/st.c"
],
"versions": [
{
"version": "888a7776f4fb04c19bec70c737c61c2f383c6b1e",
"lessThan": "262da8b6ea03d01ee7ed01ad309e4c89941f6b14",
"status": "affected",
"versionType": "git"
},
{
"version": "888a7776f4fb04c19bec70c737c61c2f383c6b1e",
"lessThan": "6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75",
"status": "affected",
"versionType": "git"
},
{
"version": "888a7776f4fb04c19bec70c737c61c2f383c6b1e",
"lessThan": "df6134b527a88b3e65ba6ae5073664af091d5fd2",
"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/lib/st.c"
],
"versions": [
{
"version": "6.17",
"status": "affected"
},
{
"version": "0",
"lessThan": "6.17",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.40",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.1.5",
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.2",
"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": "6.18.40"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.17",
"versionEndExcluding": "7.1.5"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "6.17",
"versionEndExcluding": "7.2"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/262da8b6ea03d01ee7ed01ad309e4c89941f6b14"
},
{
"url": "https://git.kernel.org/stable/c/6eb4cf2fa8997f62c11e0006dc010a1fd89c5a75"
},
{
"url": "https://git.kernel.org/stable/c/df6134b527a88b3e65ba6ae5073664af091d5fd2"
}
],
"title": "net/mlx5: free mlx5_st_idx_data on final dealloc",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
}
}