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Bug 1629940 - (CVE-2018-14656) CVE-2018-14656 kernel: Arbitrary Kernel Read into dmesg via Missing Address Check in segfault Handler
CVE-2018-14656 kernel: Arbitrary Kernel Read into dmesg via Missing Address C...
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: 1632820 1635876 1629941 1629942
Blocks: 1629943
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Reported: 2018-09-17 12:21 EDT by Pedro Sampaio
Modified: 2018-10-24 08:20 EDT (History)
53 users (show)

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Doc Text:
A missing address check in the callers of the show_opcodes() in the Linux kernel allows an attacker to dump the kernel memory at an arbitrary kernel address into the dmesg log.
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Description Pedro Sampaio 2018-09-17 12:21:46 EDT 
A missing address check in the callers of the show_opcodes() in the Linux kernel allows an attacker to dump the kernel memory at an arbitrary kernel address into the dmesg log.

References:

https://bugs.chromium.org/p/project-zero/issues/detail?id=1650

https://lore.kernel.org/lkml/20180828154901.112726-1-jannh@google.com/T/

https://seclists.org/oss-sec/2018/q4/9

An upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=342db04ae71273322f0011384a9ed414df8bdae4
Comment 1 Pedro Sampaio 2018-09-17 12:23:49 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1629942]
Comment 3 Justin M. Forbes 2018-09-17 15:09:44 EDT 
This is fixed for Fedora with the 4.18.6 stable updates.
Comment 11 Petr Matousek 2018-10-09 06:30:25 EDT 
External References:

https://bugs.chromium.org/p/project-zero/issues/detail?id=1650
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