CVE-2018-7480 - Double Free

Severity

72%

Complexity

39%

Confidentiality

165%

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.

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.

CVSS 3.0 Base Score 7.8. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 7.2. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:C/I:C/A:C).

Demo Examples

Double Free

CWE-415

Double Free

CWE-415

While contrived, this code should be exploitable on Linux distributions which do not ship with heap-chunk check summing turned on.


               
}
free(buf1R2);

Overview

Type

Linux

First reported 6 years ago

2018-02-25 20:29:00

Last updated 5 years ago

2019-03-04 18:08:00

Affected Software

Linux Kernel

Canonical Ubuntu Linux 14.04 LTS (Long-Term Support)

14.04

Canonical Ubuntu Linux 16.04 LTS (Long-Term Support)

16.04

Debian Linux 9.0

9.0

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9b54d816e00425c3a517514e0d677bb3cec49258

Patch, Vendor Advisory

https://github.com/torvalds/linux/commit/9b54d816e00425c3a517514e0d677bb3cec49258

Patch, Vendor Advisory

USN-3654-1

Third Party Advisory

USN-3654-2

Third Party Advisory

USN-3656-1

Third Party Advisory

DSA-4188

Third Party Advisory

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