Bug 1249442 – CVE-2015-4176 kernel:deletion of a file or directory could unmount and reveal data under a mount point.

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Bug 1249442 - (CVE-2015-4176) CVE-2015-4176 kernel:deletion of a file or directory could unmount and reveal data under a mount point.

Summary:	CVE-2015-4176 kernel:deletion of a file or directory could unmount and reveal...

Status:	CLOSED NOTABUG

Aliases:	CVE-2015-4176

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	impact=moderate,public=20150506,repor...
Keywords:	Security

Depends On:
Blocks:	1224245
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Reported:	2015-08-02 22:07 EDT by Wade Mealing
Modified:	2017-08-25 08:26 EDT (History)
CC List:	13 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:	A flaw was found in the Linux kernel where the deletion of a file or directory could trigger an unmount and reveal data under a mount point. This flaw was inadvertently introduced with the new feature of being able to lazily unmount a mount tree when using file system user namespaces.
Story Points:	---
Clone Of:
Environment:
Last Closed:	2017-08-25 08:26:17 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Wade Mealing 2015-08-02 22:07:19 EDT

A flaw was found in the Linux kernel where the deletion of a file or directory could
trigger an unmount and reveal data under a mount point. This flaw was inadvertantly
introduced with the new feature of being able to lazily unmount a mount tree when
using filesystem user namespaces.

Upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e0c9c0afd2fc958ffa34b697972721d81df8a56f

Comment 2 Petr Matousek 2017-08-25 08:26:17 EDT

Closing, based on https://bugzilla.redhat.com/show_bug.cgi?id=1224245#c19

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