Bug 1631205 (CVE-2018-17182) - CVE-2018-17182 kernel: Use-after-free in the vmacache_flush_all function resulting in a possible privilege escalation
Summary: CVE-2018-17182 kernel: Use-after-free in the vmacache_flush_all function resu...
Status: NEW
Alias: CVE-2018-17182
Product: Security Response
Classification: Other
Component: vulnerability   
(Show other bugs)
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=important,public=20180913,repo...
Keywords: Security
Depends On: 1631297 1631206 1631295 1631296
Blocks: 1631208
TreeView+ depends on / blocked
 
Reported: 2018-09-20 08:26 UTC by Andrej Nemec
Modified: 2019-02-08 14:56 UTC (History)
49 users (show)

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A security flaw was discovered in the Linux kernel. The vmacache_flush_all() function in mm/vmacache.c mishandles sequence number overflows. An attacker can trigger a use-after-free (and possibly gain privileges) via certain thread creation, map, unmap, invalidation, and dereference operations.
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RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---


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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3656 None None None 2018-11-26 23:14 UTC

Description Andrej Nemec 2018-09-20 08:26:54 UTC
A security flaw was discovered in the Linux kernel. The vmacache_flush_all() function in mm/vmacache.c mishandles sequence number overflows. An attacker can trigger a use-after-free (and possibly gain privileges) via certain thread creation, map, unmap, invalidation, and dereference operations.

References:

https://seclists.org/oss-sec/2018/q3/251

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7a9cdebdcc17e426fb5287e4a82db1dfe86339b2

Comment 1 Andrej Nemec 2018-09-20 08:28:21 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1631206]

Comment 5 errata-xmlrpc 2018-11-26 23:14:36 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:3656 https://access.redhat.com/errata/RHSA-2018:3656


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