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Test your applicationsThere is no fixed version for Centos:6
kernel
.
Note: Versions mentioned in the description apply only to the upstream kernel
package and not the kernel
package as distributed by Centos
.
See How to fix?
for Centos:6
relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
keys: Fix UAF in key_put()
Once a key's reference count has been reduced to 0, the garbage collector thread may destroy it at any time and so key_put() is not allowed to touch the key after that point. The most key_put() is normally allowed to do is to touch key_gc_work as that's a static global variable.
However, in an effort to speed up the reclamation of quota, this is now done in key_put() once the key's usage is reduced to 0 - but now the code is looking at the key after the deadline, which is forbidden.
Fix this by using a flag to indicate that a key can be gc'd now rather than looking at the key's refcount in the garbage collector.