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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-23454 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-019113.html siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-082556.html siemens-SADP
https://git.kernel.org/stable/c/05d345719d85b927cba74afac4d5322de3aa4256 kernel.org Patch 
https://git.kernel.org/stable/c/249e905571583a434d4ea8d6f92ccc0eef337115 kernel.org Patch 
https://git.kernel.org/stable/c/2b001901f689021acd7bf2dceed74a1bdcaaa1f9 kernel.org Patch 
https://git.kernel.org/stable/c/afdb1533eb9c05432aeb793a7280fa827c502f5c kernel.org Patch 
https://git.kernel.org/stable/c/b88edf12fc3779521ae5f6f1584153b15f7da6df kernel.org Patch 
https://git.kernel.org/stable/c/e23bf444512cb85d76012080a76cd1f9e967448e kernel.org Patch 
https://git.kernel.org/stable/c/fa103fc8f56954a60699a29215cb713448a39e87 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-416 Use After Free cwe source acceptance level NIST  

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Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-23454
NVD Published Date:
04/03/2026
NVD Last Modified:
07/14/2026
Source:
kernel.org