Security readout for executives and security teams
Plain-English summary
This is a kernel-level Android vulnerability where a race condition could let local code touch memory after it was freed. If exploitable on a vulnerable build, it could help an attacker with local access or a malicious app gain higher privileges. The public bundle does not provide CVSS, broad affected version detail, or evidence of active exploitation.
Executive priority
Handle through normal kernel patch governance, with higher priority for shared, unmanaged, or app-exposed Android fleets. It is not documented here as actively exploited, but kernel privilege escalation can materially increase the business impact of any initial compromise.
Technical view
CVE-2015-9016 is a possible use-after-free in upstream Linux blk-mq, specifically blk_mq_tag_to_rq in blk-mq.c, when a request was previously freed by blk_mq_complete_request. The reported impact is local escalation of privilege. The bundle names Android kernel as affected and cites an upstream Linux commit, Android bulletin, and Debian DSA-4187.
Likely exposure
Exposure is most relevant to Android kernel builds containing the vulnerable blk-mq code. The bundle also cites Debian DSA-4187, but does not include exact affected Debian package versions. Systems without local code execution paths are less exposed, because the stated impact is local privilege escalation, not remote compromise.
Exploitation context
The bundle does not show CISA KEV listing or any cited evidence of active exploitation. The impact requires local execution context. Treat it as a privilege-escalation risk that can worsen another foothold, especially on devices where untrusted apps or users can run code.
Researcher notes
The evidence is sparse: no CVSS, CWE, detailed affected versions, or exploit status are supplied. The key technical anchor is a blk-mq use-after-free race involving request completion and tag-to-request lookup. Avoid over-scoping beyond Android kernel and cited vendor guidance without additional vendor-specific evidence.
Mitigation direction
- Apply Android security updates covering the February 2018 bulletin guidance.
- For Debian systems, review and apply updates from DSA-4187 if applicable.
- Confirm kernel builds include the referenced upstream Linux fix commit.
- Prioritize vendor-supported kernels over backporting manually.
- Check vendor guidance where affected version details are unclear.
Validation and detection
- Inventory Android devices and kernel build versions in scope.
- Map kernel source or vendor changelogs to commit 0048b4837affd153897ed1222283492070027aa9.
- Review Android February 2018 bulletin applicability for managed devices.
- Review Debian DSA-4187 applicability for Debian-based assets.
- Document any unsupported kernels needing replacement or isolation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2015-9016 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- DSA-4187CVE reference · vendor-advisory, x_refsource_DEBIAN
- https://github.com/torvalds/linux/commit/0048b4837affd153897ed1222283492070027aa9CVE reference · x_refsource_CONFIRM
- https://source.android.com/security/bulletin/2018-02-01CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.