CVE-2026-64557
Vulnerability Scoring
Analysis In Progress
CVE-2026-64557 Vulnerability Analysis & Exploit Details
CVE-2026-64557
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-2026-64557 Details
Status: Received on 29 Jul 2026, 09:16 UTC
Published on: 29 Jul 2026, 09:16 UTC
CVSS Release:
CVE-2026-64557 Vulnerability Summary
CVE-2026-64557: In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free in l2cap_sock_new_connection_cb() l2cap_sock_new_connection_cb() returned l2cap_pi(sk)->chan after release_sock(parent). Once the parent lock is dropped the newly enqueued child socket sk is reachable via the accept queue, so another task can accept and free it before the callback dereferences sk, resulting in a use-after-free. Rework the ->new_connection() op so the core, rather than the callback, owns the child channel's lifetime. The op now receives a pre-allocated new_chan and returns an errno instead of allocating and returning a channel. l2cap_new_connection() allocates the child channel and links it into the conn list via __l2cap_chan_add() before invoking the callback, so the conn-list reference keeps the channel alive once release_sock(parent) exposes the socket to other tasks. Channel configuration that was duplicated in l2cap_sock_init() and the various new_connection callbacks is consolidated into l2cap_chan_set_defaults(), which now inherits from the parent channel when one is supplied.
Assessing the Risk of CVE-2026-64557
Access Complexity Graph
The exploitability of CVE-2026-64557 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-2026-64557
No exploitability data is available for CVE-2026-64557.
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-2026-64557, 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-2026-64557, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
-
Confidentiality:
None
CVE-2026-64557 does not compromise confidentiality.
-
Integrity:
None
CVE-2026-64557 does not impact data integrity.
-
Availability:
None
CVE-2026-64557 does not affect system availability.
CVE-2026-64557 References
External References
- https://git.kernel.org/stable/c/36da806f7fbaee56ad9e81859deec203f9728700
- https://git.kernel.org/stable/c/6fef032af0092ed5ccb767239a9ac1bc38c08a40
- https://git.kernel.org/stable/c/733e76e74e406c1d1ddc7369420dd8a47f48bb8a
- https://git.kernel.org/stable/c/84e718b6a814edc84159361f9f454a4e92ae91ae
- https://git.kernel.org/stable/c/8c37e4338c801ebb8cee52436c01c41e009f6e87
- https://git.kernel.org/stable/c/b39298044e5534612511a2ff5de03ba5f6e7a820
CWE Common Weakness Enumeration
Unknown
Protect Your Infrastructure against CVE-2026-64557: 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-2026-65100 – Apache Traffic Server updates the HTTP/2 HPACK dynamic table before confirming the header block encoded successfully, so an encode failure leaves t...
- CVE-2026-59243 – The FAB auth manager's Azure AD OAuth login defaulted `verify_signature=False` when decoding the ID token, so an attacker able to present a forged ...
- CVE-2026-58189 – Apache Traffic Server allows redirect-limit bypass when plugins reset the retry counter, enabling SSRF amplification. This issue affects Apache Tr...
- CVE-2026-58188 – Several Apache Traffic Server experimental plugins have memory-safety and limit-bypass errors. This issue affects Apache Traffic Server: from 8.0....
- CVE-2026-58187 – The Apache Traffic Server multiplexer plugin overruns its chunk-decode buffer on upstream input, enabling denial of service. This issue affects Ap...