Bug 1696015 (CVE-2019-3892) - CVE-2019-3892 kernel: fix race condition between mmget_not_zero()/get_task_mm() and core dumping
Summary: CVE-2019-3892 kernel: fix race condition between mmget_not_zero()/get_task_mm...
Keywords:
Status: CLOSED DUPLICATE of bug 1705937
Alias: CVE-2019-3892
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:
Blocks: 1696007 1696223
TreeView+ depends on / blocked
 
Reported: 2019-04-04 02:55 UTC by Wade Mealing
Modified: 2021-03-26 18:10 UTC (History)
44 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A race condition was found between mmget_not_zero()/get_task_mm() when core dumping tasks. A local attacker is able to exploit race condition where locking of semaphore would allow an attacker to leak kernel memory to userspace.
Clone Of:
Environment:
Last Closed: 2019-05-03 09:11:53 UTC
Embargoed:

Attachments (Terms of Use)

Description Wade Mealing 2019-04-04 02:55:40 UTC 
A race condition was found between between mmget_not_zero()/get_task_mm() when core dumping tasks. A local attacker is able to exploit race condition where locking of semaphore would allow an attacker to leak kernel memory to userspace.


Upstream patch:
https://marc.info/?l=linux-mm&m=155355419911404&w=2
Comment 1 Wade Mealing 2019-04-04 02:56:26 UTC 
Acknowledgments:

Name: Andrea Arcangeli (Red Hat Engineering)
Comment 4 Wade Mealing 2019-04-04 06:46:36 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1696078]
Comment 6 Vladis Dronov 2019-05-02 09:20:16 UTC 
Note:

CVE-2019-11599 was kept and CVE-2019-3892 REJECTed as reservation duplicate of CVE-2019-11599:

https://seclists.org/oss-sec/2019/q2/77

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3892
Comment 7 msiddiqu 2019-05-03 09:11:53 UTC 

*** This bug has been marked as a duplicate of bug 1705937 ***
Comment 8 Doran Moppert 2020-02-10 04:37:00 UTC 
Statement:

This flaw was found to be a duplicate of CVE-2019-11599. Please see https://access.redhat.com/security/cve/CVE-2019-11599 for information about affected products and security errata.
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