CVE-2026-23454
Vulnerability Scoring
Analysis In Progress
CVE-2026-23454 Vulnerability Analysis & Exploit Details
CVE-2026-23454
Attack Complexity Details
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Attack Complexity:
Attack Complexity Analysis In Progress
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Attack Vector:
Attack Vector Under Analysis
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Privileges Required:
None
No authentication is required for exploitation.
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Scope:
Impact is confined to the initially vulnerable component.
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User Interaction:
None
No user interaction is necessary for exploitation.
CVE-2026-23454 Details
Status: Awaiting Analysis
Last updated: 🕐 07 Apr 2026, 13:21 UTC
Originally published on: 🕓 03 Apr 2026, 16:16 UTC
Time between publication and last update: 3 days
CVSS Release:
CVE-2026-23454 Vulnerability Summary
CVE-2026-23454: In the Linux kernel, the following vulnerability has been resolved: net: mana: fix use-after-free in mana_hwc_destroy_channel() by reordering teardown A potential race condition exists in mana_hwc_destroy_channel() where hwc->caller_ctx is freed before the HWC's Completion Queue (CQ) and Event Queue (EQ) are destroyed. This allows an in-flight CQ interrupt handler to dereference freed memory, leading to a use-after-free or NULL pointer dereference in mana_hwc_handle_resp(). mana_smc_teardown_hwc() signals the hardware to stop but does not synchronize against IRQ handlers already executing on other CPUs. The IRQ synchronization only happens in mana_hwc_destroy_cq() via mana_gd_destroy_eq() -> mana_gd_deregister_irq(). Since this runs after kfree(hwc->caller_ctx), a concurrent mana_hwc_rx_event_handler() can dereference freed caller_ctx (and rxq->msg_buf) in mana_hwc_handle_resp(). Fix this by reordering teardown to reverse-of-creation order: destroy the TX/RX work queues and CQ/EQ before freeing hwc->caller_ctx. This ensures all in-flight interrupt handlers complete before the memory they access is freed.
Assessing the Risk of CVE-2026-23454
Access Complexity Graph
The exploitability of CVE-2026-23454 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-2026-23454
No exploitability data is available for CVE-2026-23454.
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-2026-23454, 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-2026-23454, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.
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Confidentiality:
None
CVE-2026-23454 does not compromise confidentiality.
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Integrity:
None
CVE-2026-23454 does not impact data integrity.
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Availability:
None
CVE-2026-23454 does not affect system availability.
CVE-2026-23454 References
External References
- https://git.kernel.org/stable/c/05d345719d85b927cba74afac4d5322de3aa4256
- https://git.kernel.org/stable/c/249e905571583a434d4ea8d6f92ccc0eef337115
- https://git.kernel.org/stable/c/2b001901f689021acd7bf2dceed74a1bdcaaa1f9
- https://git.kernel.org/stable/c/afdb1533eb9c05432aeb793a7280fa827c502f5c
- https://git.kernel.org/stable/c/e23bf444512cb85d76012080a76cd1f9e967448e
- https://git.kernel.org/stable/c/fa103fc8f56954a60699a29215cb713448a39e87
CWE Common Weakness Enumeration
Unknown
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