- Description
- A flaw was found in the Linux Kernel before 5.8-rc6 in the ZRAM kernel module, where a user with a local account and the ability to read the /sys/class/zram-control/hot_add file can create ZRAM device nodes in the /dev/ directory. This read allocates kernel memory and is not accounted for a user that triggers the creation of that ZRAM device. With this vulnerability, continually reading the device may consume a large amount of system memory and cause the Out-of-Memory (OOM) killer to activate and terminate random userspace processes, possibly making the system inoperable.
- Source
- secalert@redhat.com
- NVD status
- Modified
CVSS 3.1
- Type
- Primary
- Base score
- 5.5
- Impact score
- 3.6
- Exploitability score
- 1.8
- Vector string
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Severity
- MEDIUM
CVSS 2.0
- Type
- Primary
- Base score
- 4.9
- Impact score
- 6.9
- Exploitability score
- 3.9
- Vector string
- AV:L/AC:L/Au:N/C:N/I:N/A:C
- Hype score
- Not currently trending
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "4B3B9FFD-856C-4B58-ADD4-EE58BA12ECB4",
"versionEndExcluding": "5.8.0"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.8.0:-:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D37CFF76-F00B-46FE-AC61-84A080316E4F"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.8.0:rc1:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "937239B6-1959-4099-AA57-039A3A661BE8"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.8.0:rc2:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "36DDFE55-065B-4549-A2EF-4F3C3015C7E3"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.8.0:rc3:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "1A8D373F-782F-41EC-AAC9-BB62BE3FDC00"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.8.0:rc4:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "5595D162-7A55-4223-9A78-7AAEFDA5B8D2"
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:5.8.0:rc5:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "49E44009-A5C4-411E-B457-3634AFC4049C"
}
],
"operator": "OR"
}
]
},
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252"
}
],
"operator": "OR"
}
]
}
]