Unrated severityNVD Advisory· Published May 24, 2012· Updated Jun 16, 2026
CVE-2011-4080
CVE-2011-4080
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.
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Affected products
2Patches
Vulnerability mechanics
References
4- github.com/torvalds/linux/commit/bfdc0b497faa82a0ba2f9dddcf109231dd519fccnvdPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2011/10/26/10nvdMailing ListThird Party Advisory
- ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39nvdBroken Link
- git.kernel.orgnvd
News mentions
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