Bug 1560968 (CVE-2017-18249) - CVE-2017-18249 kernel: Race condition in fs/f2fs/node.c:add_free_nid() function allows local users to cause denial of service
Summary: CVE-2017-18249 kernel: Race condition in fs/f2fs/node.c:add_free_nid() functi...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-18249
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1563517
Blocks: 1560970
TreeView+ depends on / blocked
 
Reported: 2018-03-27 11:30 UTC by Adam Mariš
Modified: 2019-09-29 14:35 UTC (History)
45 users (show)

Fixed In Version: kernel 4.12
Doc Type: If docs needed, set a value
Doc Text:
The add_free_nid function in fs/f2fs/node.c in the Linux kernel, before 4.12, does not properly track an allocated nid. This allows local users to cause a denial of service (race condition) or possibly have unspecified other impacts via concurrent threads.
Clone Of:
Environment:
Last Closed: 2018-04-05 12:22:30 UTC


Attachments (Terms of Use)

Description Adam Mariš 2018-03-27 11:30:07 UTC
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.

Upstream patch:

https://github.com/torvalds/linux/commit/30a61ddf8117c26ac5b295e1233eaa9629a94ca3

Comment 1 Wade Mealing 2018-04-04 04:48:02 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1563517]

Comment 4 Justin M. Forbes 2018-04-04 12:51:07 UTC
This was fixed for Fedora with the 4.12 kernel


Note You need to log in before you can comment on or make changes to this bug.