CVE-2021-3492
Published Apr 17, 2021
Last updated 3 years ago
Overview
- Description
- Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562.
- Source
- security@ubuntu.com
- NVD status
- Analyzed
Social media
- Hype score
- Not currently trending
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 7.8
- Impact score
- 5.9
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
CVSS 2.0
- Type
- Primary
- Base score
- 7.2
- Impact score
- 10
- Exploitability score
- 3.9
- Vector string
- AV:L/AC:L/Au:N/C:C/I:C/A:C
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:lts:*:*:*",
"vulnerable": true,
"matchCriteriaId": "90A80DE7-3EFA-464C-9D31-C46521FFBFBF",
"versionEndExcluding": "18.04"
},
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:lts:*:*:*",
"vulnerable": true,
"matchCriteriaId": "2027773B-26DA-408E-B71D-40D05690D9EA",
"versionEndExcluding": "20.04",
"versionStartIncluding": "18.04.1"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:canonical:ubuntu_linux:*:*:*:*:-:*:*:*",
"vulnerable": true,
"matchCriteriaId": "ACAB2EE0-EC21-4669-840F-94F6C3028C64",
"versionEndExcluding": "20.10"
}
],
"operator": "OR"
}
]
}
]