CVE-2026-72032
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: HWS, fix matcher leak on resize target setup failure
hws_bwc_matcher_move() allocates a replacement matcher before setting it as the resize target. If mlx5hws_matcher_resize_set_target() fails, the replacement matcher is not attached anywhere and is leaked.
Fix the leak by destroying the replacement matcher before returning from the resize-target failure path.
The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1.
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An x86_64 allyesconfig build showed no new warnings. As we do not have a mlx5 HWS-capable device to test with, no runtime testing was able to be performed.
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.21%
- Percentil entre todas las CVEs puntuadas: 10
- Fecha de la puntuación: 5/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
Tecnologías afectadas (1)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
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{
"id": "CVE-2026-72032",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2111bb970c787b16b002dc726c1d296ce87a00fb",
"lessThan": "a751ccdc6ea9bde154f25a5ba66926f462f96c19",
"versionType": "git"
},
{
"status": "affected",
"version": "2111bb970c787b16b002dc726c1d296ce87a00fb",
"lessThan": "1dce4f4bb3c1c02080b1a45bdd2abb2913a6642a",
"versionType": "git"
},
{
"status": "affected",
"version": "2111bb970c787b16b002dc726c1d296ce87a00fb",
"lessThan": "ae0265f0a95aaacef59d560a3e1ea36db8be9a52",
"versionType": "git"
},
{
"status": "affected",
"version": "2111bb970c787b16b002dc726c1d296ce87a00fb",
"lessThan": "bb09d0e64ecaa0aa0f7d1133a1696ed74dead295",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/ethernet/mellanox/mlx5/core/steering/hws/bwc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/ethernet/mellanox/mlx5/core/steering/hws/bwc.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2026-08-15T06:21:12.143",
"references": [
{
"url": "https://git.kernel.org/stable/c/1dce4f4bb3c1c02080b1a45bdd2abb2913a6642a",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/a751ccdc6ea9bde154f25a5ba66926f462f96c19",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/ae0265f0a95aaacef59d560a3e1ea36db8be9a52",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/bb09d0e64ecaa0aa0f7d1133a1696ed74dead295",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Received",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: HWS, fix matcher leak on resize target setup failure\n\nhws_bwc_matcher_move() allocates a replacement matcher before setting it\nas the resize target. If mlx5hws_matcher_resize_set_target() fails, the\nreplacement matcher is not attached anywhere and is leaked.\n\nFix the leak by destroying the replacement matcher before returning from\nthe resize-target failure path.\n\nThe bug was first flagged by an experimental analysis tool we are\ndeveloping for kernel memory-management bugs while analyzing\nv6.13-rc1. The tool is still under development and is not yet publicly\navailable. Manual inspection confirms that the bug is still\npresent in v7.1.1.\n\nAn x86_64 allyesconfig build showed no new warnings. As we do not have a\nmlx5 HWS-capable device to test with, no runtime testing was able to be\nperformed."
}
],
"lastModified": "2026-08-17T06:18:00.970",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}