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.
References
Link | Resource |
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https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=853eab68afc80f59f36bbdeb715e5c88c501e680 | Patch Vendor Advisory |
https://www.openwall.com/lists/oss-security/2020/06/18/1 | Mailing List Patch Third Party Advisory |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10781 | Issue Tracking Third Party Advisory |
https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html | Mailing List Third Party Advisory |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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Information
Published : 2020-09-16 06:15
Updated : 2022-11-07 12:16
NVD link : CVE-2020-10781
Mitre link : CVE-2020-10781
JSON object : View
CWE
CWE-732
Incorrect Permission Assignment for Critical Resource
Products Affected
debian
- debian_linux
linux
- linux_kernel