CVE-2021-47416
- Source
- https://cve.org/CVERecord?id=CVE-2021-47416
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47416.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47416
- Downstream
- Related
- Published
- 2024-05-21T15:15:27Z
- Modified
- 2026-03-15T22:43:13Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
phy: mdio: fix memory leak
Syzbot reported memory leak in MDIO bus interface, the problem was in wrong state logic.
MDIOBUS_ALLOCATED indicates 2 states: 1. Bus is only allocated 2. Bus allocated and __mdiobus_register() fails, but device_register() was called
In case of device_register() has been called we should call put_device() to correctly free the memory allocated for this device, but mdiobus_free() calls just kfree(dev) in case of MDIOBUS_ALLOCATED state
To avoid this behaviour we need to set bus->state to MDIOBUS_UNREGISTERED before calling device_register(), because put_device() should be called even in case of device_register() failure.
- References
-
- https://git.kernel.org/stable/c/0d2dd40a7be61b89a7c99dae8ee96389d27b413a
- https://git.kernel.org/stable/c/2250392d930bd0d989f24d355d6355b0150256e7
- https://git.kernel.org/stable/c/2397b9e118721292429fea8807a698e71b94795f
- https://git.kernel.org/stable/c/25e9f88c7e3cc35f5e3d3db199660d28a15df639
- https://git.kernel.org/stable/c/414bb4ead1362ef2c8592db723c017258f213988
- https://git.kernel.org/stable/c/ca6e11c337daf7925ff8a2aac8e84490a8691905
- https://git.kernel.org/stable/c/f4f502a04ee1e543825af78f47eb7785015cd9f6
- https://git.kernel.org/stable/c/064c2616234a7394867c924b5c1303974f3a4f4d
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47416.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "2.6.28"
},
{
"fixed": "4.4.289"
}
]
},
{
"events": [
{
"introduced": "4.5"
},
{
"fixed": "4.9.287"
}
]
},
{
"events": [
{
"introduced": "4.10"
},
{
"fixed": "4.14.251"
}
]
},
{
"events": [
{
"introduced": "4.15"
},
{
"fixed": "4.19.211"
}
]
},
{
"events": [
{
"introduced": "4.20"
},
{
"fixed": "5.4.153"
}
]
},
{
"events": [
{
"introduced": "5.5"
},
{
"fixed": "5.10.73"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.14.12"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc2"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc3"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.15-rc4"
}
]
}
]