CVE-2026-80854
Vulnerability Scoring
Analysis In Progress
CVE-2026-80854 Vulnerability Analysis & Exploit Details
CVE-2026-80854
Attack Complexity Details
-
Attack Complexity:
Attack Complexity Analysis In Progress
-
Attack Vector:
Attack Vector Under Analysis
-
Privileges Required:
None
No authentication is required for exploitation.
-
Scope:
Impact is confined to the initially vulnerable component.
-
User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2026-80854 Details
Status: Received on 04 Sep 2026, 16:18 UTC
Published on: 04 Sep 2026, 16:18 UTC
CVSS Release:
CVE-2026-80854 Vulnerability Summary
CVE-2026-80854: In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_tcm: keep port count until LUN teardown completes tcm_usbg_drop_nexus() permits session removal once tpg_port_count reaches zero. However, usbg_port_unlink() currently decrements that count from the fabric_pre_unlink() callback, before core_dev_del_lun() waits for active se_lun references to drain. If removal of the last LUN races a nexus removal, the latter can observe a zero port count and call target_remove_session(). This frees sess_cmd_map while an in-flight struct usbg_cmd, including its work item, can still be accessed. Overlapping the last-LUN unlink with nexus removal reproduces this lifetime violation as a DEBUG_OBJECTS "free active" warning for usbg_cmd_work, followed by a target-core BUG/Oops. The generic target-core unlink path has no callback after core_dev_del_lun() completes. Add an optional fabric_post_unlink() callback and use it for the f_tcm port count. The count now remains nonzero until core_dev_del_lun() has finished draining active LUN references, preventing nexus removal from freeing the session during command completion.
Assessing the Risk of CVE-2026-80854
Access Complexity Graph
The exploitability of CVE-2026-80854 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).
Exploitability Analysis for CVE-2026-80854
No exploitability data is available for CVE-2026-80854.
Understanding AC and PR
A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.
Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.
Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.
CVSS Score Breakdown Chart
Above is the CVSS Sub-score Breakdown for CVE-2026-80854, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.
CIA Impact Analysis
Below is the Impact Analysis for CVE-2026-80854, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
-
Confidentiality:
None
CVE-2026-80854 does not compromise confidentiality.
-
Integrity:
None
CVE-2026-80854 does not impact data integrity.
-
Availability:
None
CVE-2026-80854 does not affect system availability.
CVE-2026-80854 References
External References
- https://git.kernel.org/stable/c/178f59a0bccd3f66cdfa5184310f31a58b7257c4
- https://git.kernel.org/stable/c/2efbfd42441d3ef8137aff2d59e9835e1d5ae780
- https://git.kernel.org/stable/c/85aa61fedcb4eb13f3dc5db73f6dc359f41f5d95
- https://git.kernel.org/stable/c/ad6f0375d2e93a1d8c015463e5e92dfcb26e311b
- https://git.kernel.org/stable/c/bbd6aa311a9f4dd17822c7557451458d3d2e980b
- https://git.kernel.org/stable/c/c1f359d9a5efed458946063de65ddbeaacc4f165
- https://git.kernel.org/stable/c/c39d0916da47d94909391876c9e5bd429ea7b1b9
- https://git.kernel.org/stable/c/c494c5562ca69b61a82f566e3b87a445d2c28929
- https://git.kernel.org/stable/c/eaa96a8458f54d6cf0954242ab8b1df2a6fccafa
CWE Common Weakness Enumeration
Unknown
Protect Your Infrastructure against CVE-2026-80854: Combat Critical CVE Threats
Stay updated with real-time CVE vulnerabilities and take action to secure your systems. Enhance your cybersecurity posture with the latest threat intelligence and mitigation techniques. Develop the skills necessary to defend against CVEs and secure critical infrastructures. Join the top cybersecurity professionals safeguarding today's infrastructures.
Other 5 Recently Published CVEs Vulnerabilities
- CVE-2026-85200 – The GEO my WP plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 4.5.5.3 via the gmw_posts_locator_aj...
- CVE-2026-85198 – The MPG – Multiple Page Generator, Bulk Landing Pages & Programmatic SEO plugin for WordPress is vulnerable to generic SQL Injection via URL Path i...
- CVE-2026-78175 – The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and includin...
- CVE-2026-78159 – The The Events Calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 6.17.3 via the parse_arra...
- CVE-2026-78006 – The The Events Calendar plugin for WordPress is vulnerable to Remote Code Execution in all versions up to, and including, 6.17.4 via the is_safe_wi...