CVE-2013-4483: Medium severity linux kernel vulnerability
Published Oct 30, 2013
·
Updated
A flaw was found in the way ipcrcuputref() function handled reference counter decrementing. Without external synchronization reference counter might not be adjusted properly, as presented with the freeque() vs domsgsnd() race, leading to memory leaks.
An unprivileged local user could use this flaw to cause OOM conditions, potentially crashing the system.
Upstream patch:
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6062a8
(making the refcounter atomic hunks)
Acknowledgements:
Red Hat would like to thank Vladimir Davydov (Parallels) for reporting this issue.
Other sources
The ipcrcuputref function in ipc/util.c in the Linux kernel before 3.10 does not properly manage a reference count, which allows local users to cause a denial of service (memory consumption or system crash) via a crafted application.
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