CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
5.1%
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.
Author | Note |
---|---|
sbeattie | zram module is not loaded by default, but is enabled. |
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < 4.15.0-115.116 | UNKNOWN |
ubuntu | 20.04 | noarch | linux | < 5.4.0-45.49 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < 4.15.0-1080.84 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < 5.4.0-1022.22 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws-5.4 | < 5.4.0-1022.22~18.04.1 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-aws-hwe | < 4.15.0-1080.84~16.04.1 | UNKNOWN |
ubuntu | 20.04 | noarch | linux-azure | < 5.4.0-1023.23 | UNKNOWN |
ubuntu | 14.04 | noarch | linux-azure | < 4.15.0-1093.103~14.04.1 | UNKNOWN |
ubuntu | 16.04 | noarch | linux-azure | < 4.15.0-1093.103~16.04.1 | UNKNOWN |
ubuntu | 18.04 | noarch | linux-azure-4.15 | < 4.15.0-1093.103 | UNKNOWN |
launchpad.net/bugs/cve/CVE-2020-10781
lore.kernel.org/linux-block/[email protected]/
nvd.nist.gov/vuln/detail/CVE-2020-10781
security-tracker.debian.org/tracker/CVE-2020-10781
ubuntu.com/security/notices/USN-4483-1
ubuntu.com/security/notices/USN-4485-1
www.cve.org/CVERecord?id=CVE-2020-10781
www.openwall.com/lists/oss-security/2020/06/18/1
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:N/I:N/A:C
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS
Percentile
5.1%