Vulnerability Details : CVE-2020-10781
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.
Products affected by CVE-2020-10781
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.8.0:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.8.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.8.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.8.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.8.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.8.0:rc5:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-10781
0.04%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 6 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-10781
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.9
|
MEDIUM | AV:L/AC:L/Au:N/C:N/I:N/A:C |
3.9
|
6.9
|
NIST | |
|
5.5
|
MEDIUM | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
Red Hat, Inc. | |
|
5.5
|
MEDIUM | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
1.8
|
3.6
|
NIST |
CWE ids for CVE-2020-10781
-
The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2020-10781
-
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
[SECURITY] [DLA 2385-1] linux-4.19 security updateMailing List;Third Party Advisory
-
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=853eab68afc80f59f36bbdeb715e5c88c501e680
kernel/git/torvalds/linux.git - Linux kernel source treePatch;Vendor Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10781
1847832 – (CVE-2020-10781) CVE-2020-10781 kernel: zram sysfs resource consumptionIssue Tracking;Third Party Advisory
-
https://www.openwall.com/lists/oss-security/2020/06/18/1
oss-security - CVE-2020-10781 kernel: zram sysfs resource consumptionMailing List;Patch;Third Party Advisory
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