CVE-2021-46966
- Source
- https://cve.org/CVERecord?id=CVE-2021-46966
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46966.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-46966
- Downstream
- Related
- Published
- 2024-02-27T19:04:07Z
- Modified
- 2026-03-15T22:42:42Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
ACPI: custom_method: fix potential use-after-free issue
In cm_write(), buf is always freed when reaching the end of the function. If the requested count is less than table.length, the allocated buffer will be freed but subsequent calls to cm_write() will still try to access it.
Remove the unconditional kfree(buf) at the end of the function and set the buf to NULL in the -EINVAL error path to match the rest of function.
- References
-
- https://git.kernel.org/stable/c/1d53ca5d131074c925ce38361fb0376d3bf7e394
- https://git.kernel.org/stable/c/72814a94c38a33239793f7622cec6ace1e540c4b
- https://git.kernel.org/stable/c/a5b26a2e362f572d87e9fd35435680e557052a17
- https://git.kernel.org/stable/c/b7a5baaae212a686ceb812c32fceed79c03c0234
- https://git.kernel.org/stable/c/f16737caf41fc06cfe6e49048becb09657074d4b
- https://git.kernel.org/stable/c/62dc2440ebb552aa0d7f635e1697e077d9d21203
- https://git.kernel.org/stable/c/8b04d57f30caf76649d0567551589af9a66ca9be
- https://git.kernel.org/stable/c/90575d1d9311b753cf1718f4ce9061ddda7dfd23
- https://git.kernel.org/stable/c/e483bb9a991bdae29a0caa4b3a6d002c968f94aa
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-46966.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "4.4.195"
},
{
"fixed": "4.4.269"
}
]
},
{
"events": [
{
"introduced": "4.9.195"
},
{
"fixed": "4.9.269"
}
]
},
{
"events": [
{
"introduced": "4.14.147"
},
{
"fixed": "4.14.233"
}
]
},
{
"events": [
{
"introduced": "4.19.77"
},
{
"fixed": "4.19.191"
}
]
},
{
"events": [
{
"introduced": "5.4"
},
{
"fixed": "5.4.118"
}
]
},
{
"events": [
{
"introduced": "5.5"
},
{
"fixed": "5.10.36"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.11.20"
}
]
},
{
"events": [
{
"introduced": "5.12"
},
{
"fixed": "5.12.3"
}
]
}
]