Bug 1549421 (CVE-2017-18193) - CVE-2017-18193 kernel: Mishandled extent trees in fs/f2fs/extent_cache.c can allow a local user to cause a denial of service
Summary: CVE-2017-18193 kernel: Mishandled extent trees in fs/f2fs/extent_cache.c can ...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2017-18193
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1550994
Blocks: Embargoed1549422
TreeView+ depends on / blocked
 
Reported: 2018-02-27 04:18 UTC by Sam Fowler
Modified: 2021-06-10 14:53 UTC (History)
27 users (show)

Fixed In Version: kernel 4.13
Doc Type: If docs needed, set a value
Doc Text:
fs/f2fs/extent_cache.c in the Linux kernel, before 4.13, mishandles extent trees. This allows local users to cause a denial of service via an application with multiple threads.
Clone Of:
Environment:
Last Closed: 2018-03-02 14:03:32 UTC

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Description Sam Fowler 2018-02-27 04:18:56 UTC 
fs/f2fs/extent_cache.c in the Linux kernel before 4.13 mishandles extent trees, which allows local users to cause a denial of service via an application with multiple threads.

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=dad48e73127ba10279ea33e6dbc8d3905c4d31c0
Comment 2 Vladis Dronov 2018-03-02 14:00:03 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1550994]
Comment 4 Vladis Dronov 2018-03-02 14:03:32 UTC 
Statement:

This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE, as the code with the flaw is not built and shipped in the products listed.
Comment 5 Justin M. Forbes 2018-03-02 21:19:23 UTC 
This issue was fixed for Fedora with the 4.13 kernel rebases.
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