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Bug 1549427 - (CVE-2018-7480) CVE-2018-7480 kernel: Double free in block/blk-cgroup.c:blkcg_init_queue() can allow a local user to cause a denial of service
CVE-2018-7480 kernel: Double free in block/blk-cgroup.c:blkcg_init_queue() ca...
Status: CLOSED NOTABUG
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=20180225,repor...
: Security
Depends On:
Blocks: 1549429
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Reported: 2018-02-26 23:34 EST by Sam Fowler
Modified: 2018-03-12 11:09 EDT (History)
26 users (show)

See Also:
Fixed In Version: kernel 4.11
Doc Type: If docs needed, set a value
Doc Text:
The blkcg_init_queue function in block/blk-cgroup.c in the Linux kernel, before 4.11, allows local users to cause a denial of service (double free) or possibly have unspecified other impact by triggering a creation failure.
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Clone Of:
Environment:
Last Closed: 2018-03-01 04:21:50 EST
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CRM:
Verified Versions:
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Sam Fowler 2018-02-26 23:34:34 EST 
The blkcg_init_queue function in block/blk-cgroup.c in the Linux kernel before 4.11 allows local users to cause a denial of service (double free) or possibly have unspecified other impact by triggering a creation failure.

References:

https://marc.info/?t=148611364100003&r=1&w=2

An upstream commit:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b54d816e00425c3a517514e0d677bb3cec49258
Comment 3 Vladis Dronov 2018-03-01 04:21:50 EST 
Statement:

This issue does not affect the versions of the Linux kernel as shipped with Red Hat Enterprise Linux 5, 6, 7, its real-time kernel, Red Hat Enterprise MRG 2, Red Hat Enterprise Linux 7 for ARM 64 and Red Hat Enterprise Linux 7 for Power 9 LE, as the code with the flaw is not present in the products listed.
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