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.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | - | 5.8.0 |
| linux / linux_kernel | 5.8.0 | 5.8.0.x |
| linux / linux_kernel | 5.8.0-rc1 | 5.8.0-rc1.x |
| linux / linux_kernel | 5.8.0-rc2 | 5.8.0-rc2.x |
| linux / linux_kernel | 5.8.0-rc3 | 5.8.0-rc3.x |
| linux / linux_kernel | 5.8.0-rc4 | 5.8.0-rc4.x |
| linux / linux_kernel | 5.8.0-rc5 | 5.8.0-rc5.x |
| debian / debian_linux | 9.0 | 9.0.x |
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10781
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=853eab68afc80f59f36bbdeb715e5c88c501e680
- https://lists.debian.org/debian-lts-announce/2020/09/msg00025.html
- https://www.openwall.com/lists/oss-security/2020/06/18/1
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