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Bug 1631205 - (CVE-2018-17182) CVE-2018-17182 kernel: Use-after-free in the vmacache_flush_all function resulting in a possible privilege escalation
CVE-2018-17182 kernel: Use-after-free in the vmacache_flush_all function resu...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
high Severity high
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Assigned To: Red Hat Product Security
impact=important,public=20180913,repo...
: Security
Depends On: 1631295 1631297 1631206 1631296
Blocks: 1631208
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Reported: 2018-09-20 04:26 EDT by Andrej Nemec
Modified: 2018-10-08 10:00 EDT (History)
50 users (show)

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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.
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Description Andrej Nemec 2018-09-20 04:26:54 EDT 
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 04:28:21 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1631206]
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