It was found that AIO interface didn't use the proper rw_verify_area() helper function with extended functionality, for example, mandatory locking on the file. Also rw_verify_area() makes extended checks, for example, that the size of the access doesn't cause overflow of the provided offset limits. This integer overflow in fs/aio.c in the Linux kernel before 3.4.1 allows local users to cause a denial of service or possibly have unspecified other impact via a large AIO iovec.
CVE-ID request and assignment:
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 5. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 6. Future Linux kernel updates for the respective releases might address this issue.
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2 as the corresponding fix is already present.
This issue has been addressed in the following products:
Red Hat Enterprise Linux 6
Via RHSA-2018:1854 https://access.redhat.com/errata/RHSA-2018:1854