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Bug 1554199 - (CVE-2018-8043) CVE-2018-8043 kernel: NULL pointer dereference in drivers/net/phy/mdio-bcm-unimac.c:unimac_mdio_probe() can lead to denial of service
CVE-2018-8043 kernel: NULL pointer dereference in drivers/net/phy/mdio-bcm-un...
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=20180111,reported=2...
: Security
Depends On: 1556978 1554200 1556979
Blocks: 1554204
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Reported: 2018-03-12 00:03 EDT by Sam Fowler
Modified: 2018-08-30 00:54 EDT (History)
44 users (show)

See Also:
Fixed In Version: kernel 4.16-rc1
Doc Type: If docs needed, set a value
Doc Text:
The Linux kernel was found vulnerable to a NULL pointer dereference in the drivers/net/phy/mdio-bcm-unimac.c:unimac_mdio_probe() function caused by an unchecked return value from the platform_get_resource() function. A successful flaw exploitation can cause a system panic and a denial of service. This flaw is believed not to be an attacker triggerable as bad return value can be caused by hardware misconfiguration.
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Description Sam Fowler 2018-03-12 00:03:39 EDT 
The Linux kernel was found vulnerable to a NULL pointer dereference in the drivers/net/phy/mdio-bcm-unimac.c:unimac_mdio_probe() function caused by an unchecked return value from the platform_get_resource() function. A successful flaw exploitation can cause a system panic and a denial of service. This flaw is believed not to be an attacker triggerable as bad return value can be caused by hardware misconfiguration.

References:

https://marc.info/?l=kernel-janitors&m=151566944123938&w=2

An upstream fix:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=297a6961ffb8ff4dc66c9fbf53b924bd1dda05d5
Comment 1 Sam Fowler 2018-03-12 00:04:40 EDT 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1554200]
Comment 6 Fedora Update System 2018-03-16 12:18:01 EDT 
kernel-4.15.9-200.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.
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