CVE-2017-18249

Description

The add_free_nid function in fs/f2fs/node.c in the Linux kernel before 4.12 does not properly track an allocated nid, which allows local users to cause a denial of service (race condition) or possibly have unspecified other impact via concurrent threads.

References

Link	Tags
http://www.securitytracker.com/id/1041432	third party advisory vdb entry
https://github.com/torvalds/linux/commit/30a61ddf8117c26ac5b295e1233eaa9629a94ca3	third party advisory patch
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html	third party advisory mailing list
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=30a61ddf8117c26ac5b295e1233eaa9629a94ca3	third party advisory patch
https://usn.ubuntu.com/3932-1/	vendor advisory
https://usn.ubuntu.com/3932-2/	vendor advisory

Frequently Asked Questions

What is the severity of CVE-2017-18249?: CVE-2017-18249 has been scored as a high severity vulnerability.
How to fix CVE-2017-18249?: To fix CVE-2017-18249, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2017-18249 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2017-18249 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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Description

Category

CWE-362 – Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

References

Frequently Asked Questions