CVE-2020-10781
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2020-10781
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2020-10781.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 5.7.10-1 |
| debian | bullseye | fixed | 5.7.10-1 |
| debian | forky | fixed | 5.7.10-1 |
| debian | sid | fixed | 5.7.10-1 |
| debian | trixie | fixed | 5.7.10-1 |
References
Verify integrity in audit chain (admin only). AS-IS.