CVE-2011-4080
Medium
Description
The sysrq_sysctl_handler function in kernel/sysctl.c in the Linux kernel before 2.6.39 does not require the CAP_SYS_ADMIN capability to modify the dmesg_restrict value, which allows local users to bypass intended access restrictions and read the kernel ring buffer by leveraging root privileges, as demonstrated by a root user in a Linux Containers (aka LXC) environment.
SeverityMedium
CVSS4.0
Exploit probability—
Product
Linux Kernel
PublishedMay 24, 2012
First seenMay 24, 2012
How to fix
Update
- linux linux_kernel2.6.39 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | v < 2.6.39 | 2.6.39 |
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