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Bug 1533909 (CVE-2018-5344) - CVE-2018-5344 kernel: drivers/block/loop.c mishandles lo_release serialization allowing denial-of-service
Summary: CVE-2018-5344 kernel: drivers/block/loop.c mishandles lo_release serializatio...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-5344
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: 1533910 1533911 1541228 1541229 1541230 1541231 1541232 1740295 1740296 1740297
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-01-12 14:03 UTC by Adam Mariš
Modified: 2021-02-17 00:59 UTC (History)
44 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2019-06-08 03:36:58 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:2948 0 None None None 2018-10-30 08:57:23 UTC
Red Hat Product Errata RHSA-2018:3083 0 None None None 2018-10-30 07:31:15 UTC
Red Hat Product Errata RHSA-2018:3096 0 None None None 2018-10-30 07:37:23 UTC

Description Adam Mariš 2018-01-12 14:03:33 UTC 
A flaw was found in the Linux kernels handling of loopback devices where it mishandles the release (lo_release function) where an attacker who has permissions to setup loopback disks.

This may allow an attacker to cause a denial of service (__lock_acquire use-after-free) or possibly have unspecified other impact.

Upstream patch:

https://github.com/torvalds/linux/commit/ae6650163c66a7eff1acd6eb8b0f752dcfa8eba5
Comment 1 Adam Mariš 2018-01-12 14:05:42 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1533911]
Comment 8 Eric Christensen 2018-02-02 16:17:30 UTC 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5 and 6.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2.

Future Linux kernel updates for the respective releases may address this issue.
Comment 9 errata-xmlrpc 2018-10-30 07:30:57 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3083 https://access.redhat.com/errata/RHSA-2018:3083
Comment 10 errata-xmlrpc 2018-10-30 07:37:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3096 https://access.redhat.com/errata/RHSA-2018:3096
Comment 11 errata-xmlrpc 2018-10-30 08:57:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:2948 https://access.redhat.com/errata/RHSA-2018:2948
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