CVE-2026-92509
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/core: Fix potential use after free in counter_release() When accessing a counter via the netlink path the only synchronization mechanism for the said counter is rdma_restrack_get(). Currently, rdma_restrack_del() is invoked at the end of counter_release(), which is too late, since by that point vendor-specific resources associated with the counter might already be freed. This can leave a short window where the counter remains accessible through restrack, leading to a potential use-after-free. Fix this by moving the rdma_restrack_del() call to be before the freeing of the vendor-specific resources, ensuring that the counter is removed from restrack before its internal resources are released. This guarantees that no new users hold references to a counter that is in the process of destruction.
Severity
Not scored
CVSS score
Not available
Vulnerability status
Received
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-09-17 17:17:53.590000
Last modified
2026-10-19 10:16:51.260000
View original CVE JSON
{
"id": "CVE-2026-92509",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-09-17T17:17:53.590",
"lastModified": "2026-10-19T10:16:51.260",
"vulnStatus": "Received",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in counter_release()\n\nWhen accessing a counter via the netlink path the only synchronization\nmechanism for the said counter is rdma_restrack_get().\nCurrently, rdma_restrack_del() is invoked at the end of\ncounter_release(), which is too late, since by that point\nvendor-specific resources associated with the counter might already be\nfreed. This can leave a short window where the counter remains\naccessible through restrack, leading to a potential use-after-free.\n\nFix this by moving the rdma_restrack_del() call to be before the\nfreeing of the vendor-specific resources, ensuring that the counter is\nremoved from restrack before its internal resources are released.\nThis guarantees that no new users hold references to a counter that is\nin the process of destruction."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/infiniband/core/counters.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
"lessThan": "5eb0c57a8b568eb08f464861d84d518a2af939ac",
"versionType": "git",
"status": "affected"
},
{
"version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
"lessThan": "d5cc211e8c39e46f357d30a092d683e84d560de9",
"versionType": "git",
"status": "affected"
},
{
"version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
"lessThan": "2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b",
"versionType": "git",
"status": "affected"
},
{
"version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
"lessThan": "8c013e3a8d8273da4d47bf1c27f016a3551996f5",
"versionType": "git",
"status": "affected"
},
{
"version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
"lessThan": "64c72390d8407ea86de712a477c796b07d37abc4",
"versionType": "git",
"status": "affected"
},
{
"version": "99fa331dc8629be55ac7a0cca0dc56492070ddac",
"lessThan": "235ef2d0e750885c29340b0fc40620a7a4f52e12",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/infiniband/core/counters.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.3",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.3",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.188",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.157",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.110",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18.52",
"lessThanOrEqual": "6.18.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.2.6",
"lessThanOrEqual": "7.2.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "7.3",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {},
"references": [
{
"url": "https://git.kernel.org/stable/c/235ef2d0e750885c29340b0fc40620a7a4f52e12",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/2f0c6705e26ba92c0c6b0b0908a2d3f35a039d5b",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5eb0c57a8b568eb08f464861d84d518a2af939ac",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/64c72390d8407ea86de712a477c796b07d37abc4",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/8c013e3a8d8273da4d47bf1c27f016a3551996f5",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/d5cc211e8c39e46f357d30a092d683e84d560de9",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}