Description

In the Linux kernel before 4.15, fs/ocfs2/aops.c omits use of a semaphore and consequently has a race condition for access to the extent tree during read operations in DIRECT mode, which allows local users to cause a denial of service (BUG) by modifying a certain e_cpos field.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=3e4c56d41eef5595035872a2ec5a483f42e8917f

http://www.securityfocus.com/bid/103353

https://github.com/torvalds/linux/commit/3e4c56d41eef5595035872a2ec5a483f42e8917f

https://www.debian.org/security/2018/dsa-4188

Details

Risk Information

CVSS v2

CVSS v3