CVE-2015-9016

Description

In blk_mq_tag_to_rq in blk-mq.c in the upstream kernel, there is a possible use after free due to a race condition when a request has been previously freed by blk_mq_complete_request. This could lead to local escalation of privilege. Product: Android. Versions: Android kernel. Android ID: A-63083046.

CVSS Metrics

• v3.0•HIGH•Score: 7CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 6.9AV:L/AC:M/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.14%• Percentile: 4%

Techniques & Countermeasures

• CWE-264•Permissions, Privileges, and Access Controls

  Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control.

• CWE-362•Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

  The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Affected Systems

• debian•linux

  < 4.2.3-1 | < 4.2.3-1 | < 4.2.3-1 | < 4.2.3-1

• google inc.•android

  Android kernel

• google•android

  na

References (4)

• https://www.debian.org/security/2018/dsa-4187
• https://github.com/torvalds/linux/commit/0048b4837affd153897ed1222283492070027aa9
• https://source.android.com/security/bulletin/2018-02-01
• https://security-tracker.debian.org/tracker/CVE-2015-9016