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Bug 1529124 - (CVE-2017-17862) CVE-2017-17862 kernel: Improper logic pruning in bpf/verifier.c
CVE-2017-17862 kernel: Improper logic pruning in bpf/verifier.c
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20171223,reported=2...
: Security
Depends On: 1535002 1529125
Blocks: 1528364
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Reported: 2017-12-26 09:46 EST by Pedro Sampaio
Modified: 2018-08-28 18:30 EDT (History)
43 users (show)

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Description Pedro Sampaio 2017-12-26 09:46:26 EST 
kernel/bpf/verifier.c in the Linux kernel through 4.14.8 ignores unreachable code, even though it would still be processed by JIT compilers. This behavior, also considered an improper branch-pruning logic issue, could possibly be used by local users for denial of service.

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c131187db2d3fa2f8bf32fdf4e9a4ef805168467

References:

https://www.spinics.net/lists/stable/msg206984.html
Comment 1 Pedro Sampaio 2017-12-26 09:47:33 EST 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1529125]
Comment 3 Prasad J Pandit 2018-01-18 00:26:05 EST 
Statement:

This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
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