Bug 1393904 - (CVE-2016-8645) CVE-2016-8645 kernel: a BUG() statement can be hit in net/ipv4/tcp_input.c
CVE-2016-8645 kernel: a BUG() statement can be hit in net/ipv4/tcp_input.c
Status: NEW
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=20161110,repor...
: Security
Depends On: 1400220 1393908 1395256 1400217 1400218
Blocks: 1390621
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Reported: 2016-11-10 10:13 EST by Vladis Dronov
Modified: 2018-07-19 02:21 EDT (History)
34 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was discovered that the Linux kernel since 3.6-rc1 with 'net.ipv4.tcp_fastopen' set to 1 can hit BUG() statement in tcp_collapse() function after making a number of certain syscalls leading to a possible system crash.
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)


External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:1842 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2017-08-01 14:22:09 EDT
Red Hat Product Errata RHSA-2017:2077 normal SHIPPED_LIVE Important: kernel-rt security, bug fix, and enhancement update 2017-08-01 14:13:37 EDT
Red Hat Product Errata RHSA-2017:2669 normal SHIPPED_LIVE Important: kernel-rt security and bug fix update 2017-09-06 20:36:52 EDT

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Description Vladis Dronov 2016-11-10 10:13:32 EST
It was discovered that the Linux kernel since, at least, v4.0 till v4.9-rc1 can hit BUG() statement in tcp_collapse() function after making a number of certain syscalls leading to a possible system crash.

Discussion at stable@:

http://www.spinics.net/lists/stable/msg150470.html

Discussion at netdev@:

http://www.spinics.net/lists/netdev/msg403701.html

http://marc.info/?l=linux-netdev&m=147878925724283&w=2

http://marc.info/?t=147878927800005&r=1&w=2 # the whole thread

A proposed patch:

http://marc.info/?l=linux-netdev&m=147881188232264&w=2 # patch v1

http://marc.info/?t=147881111500001&r=1&w=2&n=2 # the whole thread

http://marc.info/?l=linux-netdev&m=147881236332369&w=2 # patch v2

http://marc.info/?t=147881240700003&r=1&w=2 # the whole thread

http://www.spinics.net/lists/netdev/msg403787.html

http://www.spinics.net/lists/netdev/msg403789.html # patch v2

An upstream patch:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ac6e780070e30e4c35bd395acfe9191e6268bdd3

CVE-ID assignment:

http://seclists.org/oss-sec/2016/q4/397
Comment 1 Vladis Dronov 2016-11-10 10:14:00 EST
Acknowledgments:

Name: Marco Grassi
Comment 2 Vladis Dronov 2016-11-10 10:15:48 EST
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1393908]
Comment 3 Vladis Dronov 2016-11-11 07:55:06 EST
CVE-2016-8645 was assigned to this flaw internally by the Red Hat, please, use this CVE-ID in communications regarding this flaw:

http://seclists.org/oss-sec/2016/q4/397
Comment 5 Vladis Dronov 2016-11-15 09:12:22 EST
Statement:

This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 as the code which can trigger the flaw is not present in the products listed.

This issue affects the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and MRG-2. Future Linux kernel updates for the respective releases might address this issue.
Comment 10 errata-xmlrpc 2017-08-01 15:10:13 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:2077 https://access.redhat.com/errata/RHSA-2017:2077
Comment 11 errata-xmlrpc 2017-08-02 03:50:14 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2017:1842 https://access.redhat.com/errata/RHSA-2017:1842
Comment 12 errata-xmlrpc 2017-09-06 16:38:34 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise MRG 2

Via RHSA-2017:2669 https://access.redhat.com/errata/RHSA-2017:2669

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