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...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-17182
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1631206 1631295 1631296 1631297
Blocks: 1631208
TreeView+ depends on / blocked
 
Reported: 2018-09-20 08:26 UTC by Andrej Nemec
Modified: 2022-03-13 15:35 UTC (History)
49 users (show)

Fixed In Version:
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Doc Text:
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.
Clone Of:
Environment:
Last Closed: 2019-06-10 10:38:22 UTC
Embargoed:

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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2018:3656 0 None None None 2018-11-26 23:14:51 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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