EUVD-2026-78966
GHSA-4m8w-p4p5-8mhw
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V15 - Secure Coding and Architecture Concurrency control, locking
MITRE ATT&CK
1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Sep 15, 2026
Let me synthesize.
CVE-2026-56923: Android kernel TIPC virtio driver (tipc_virtio_dev.c) handle_unmap_req race condition memory corruption, local EoP.
CVSS 3.1: AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H → 6.4. Note PR:H which is odd for a local privilege escalation "with no additional execution privileges needed" — the description says no additional execution privileges needed. Hmm, the CVSS says PR:H. There's a conflict: description says local EoP with no additional execution privileges needed (implying PR:N or PR:L?), while CVSS vector says PR:H. This is a data conflict worth noting in confidence_notes and risk_assessment.
Actually Android's kernel CVEs for local EoP typically are AV:L/AC:H/PR:H/UI:N in their bulletins... Actually Android uses PR:H sometimes? Hmm. Let me note the conflict: description claims "no additional execution privileges needed" but vector shows PR:H (high privileges required), which typically means the attacker already needs elevated privileges — contradictory for an EoP. State explicitly.
Product name: "Android Kernel" — 2 words. Or "TIPC Virtio Driver". Primary product per CPE: google:android. I'd say "Android Kernel".
Tags: Privilege Escalation, Buffer Overflow, Google, Race Condition. Buffer Overflow mislabeled? The CWE is race condition/memory corruption. Hmm — "Buffer Overflow" tag is arguably a mislabeled tag since CWE-362 race condition and description says memory corruption not buffer overflow. But memory corruption could involve buffer overflow. I'd be moderately confident... The instructions say only emit flag when clearly wrong and verifiable. Memory corruption due to race condition — buffer overflow is a specific subclass. It's arguably mislabeling. I could flag it with low/medium confidence. Hmm. I think I'll flag it as mislabeled_tag with medium confidence since the CVE is a race condition leading to memory corruption, no buffer overflow specified. Actually careful — race conditions can cause buffer overflows (TOCTOU). Risky.
Affected VersionsENISA
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Severity by source
AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (Google_Devices) · only source for this CVE.
CVSS VectorVendor: Google_Devices
Lifecycle Timeline
3DescriptionCVE.org
In handle_unmap_req of tipc_virtio_dev.c, there is a possible memory corruption due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Race conditions occur when multiple concurrent requests exploit the brief time gap between checking a condition and acting upon it (TOCTOU - Time of Check, Time of Use).
Exploit-DB