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Bug 1507539 - (CVE-2017-15951) CVE-2017-15951 kernel: Race condition in the KEYS subsystem
CVE-2017-15951 kernel: Race condition in the KEYS subsystem
Status: CLOSED NOTABUG
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20171018,repor...
: Security
Depends On: 1514003
Blocks: 1507540
  Show dependency tree / graph
 
Reported: 2017-10-30 10:19 EDT by Andrej Nemec
Modified: 2018-02-12 03:57 EST (History)
48 users (show)

See Also:
Fixed In Version: kernel 4.13.10
Doc Type: Bug Fix
Doc Text:
The KEYS subsystem in the Linux kernel before 4.13.10 does not correctly synchronize the actions of updating versus finding a key in the "negative" state to avoid a race condition, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls.
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Clone Of:
Environment:
Last Closed: 2017-11-16 08:41:44 EST
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Regression: ---
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CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Andrej Nemec 2017-10-30 10:19:33 EDT 
The KEYS subsystem in the Linux kernel before 4.13.10 does not correctly synchronize the actions of updating versus finding a key in the "negative" state to avoid a race condition, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls.

References:

https://bugzilla.suse.com/show_bug.cgi?id=1065615

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=363b02dab09b3226f3bd1420dad9c72b79a42a76
Comment 1 Vladis Dronov 2017-11-16 08:19:49 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1514003]
Comment 4 Vladis Dronov 2017-11-16 08:41:44 EST 
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6, 7 and MRG 2 as a code with the flaw is not present in the products listed.
Comment 5 Justin M. Forbes 2018-01-29 11:58:49 EST 
This was fixed for Fedora with the 4.13.10 stable updates.
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