Bug 1801616 (CVE-2019-15791) - CVE-2019-15791 kernel: reference count underflow was discovered in shiftfs implementation causing dos
Summary: CVE-2019-15791 kernel: reference count underflow was discovered in shiftfs im...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-15791
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: 1801617
Blocks: 1801619
TreeView+ depends on / blocked
 
Reported: 2020-02-11 11:24 UTC by Dhananjay Arunesh
Modified: 2021-02-16 20:36 UTC (History)
44 users (show)

Fixed In Version:
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Doc Text:
A vulnerability was found in Linux kernel. A reference count underflow was discovered in the shiftfs implementation which could be used to cause a denial of service (system crash) or possibly execute arbitrary code. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2020-03-31 05:47:22 UTC
Embargoed:

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Description Dhananjay Arunesh 2020-02-11 11:24:48 UTC 
A vulnerability was found in Linux Kernel, where a reference count underflow was discovered in the shiftfs implementation in the Linux kernel. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Reference:
http://people.canonical.com/~ubuntu-security/cve/2019/CVE-2019-15791.html
Comment 1 Dhananjay Arunesh 2020-02-11 11:25:47 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1801617]
Comment 2 Justin M. Forbes 2020-02-11 15:52:50 UTC 
Shiftfs is not upstream, and is currently an Ubuntu specific patch set.  This has never impacted any Fedora products.
Comment 3 Dave Baker 2020-03-10 13:57:50 UTC 
The fs/shiftfs.c file affected by this flaw is also not present in RHEL.
Comment 4 Wade Mealing 2020-03-31 05:46:35 UTC 
Statement:

No current shipping products include the code necessary to fix this issue.
Comment 5 Wade Mealing 2020-03-31 05:47:04 UTC 
Mitigation:

Mitigation of this flaw is not necessary on Red Hat Enterprise Linux and layered products.
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