Bug 2451251 (CVE-2026-23328)

Summary: CVE-2026-23328 kernel: accel/amdxdna: Fix NULL pointer dereference of mgmt_chann
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's accel/amdxdna component. An unexpected firmware error during message handling can cause a critical communication variable (mgmt_chann) to be set to NULL. This can lead to a NULL pointer dereference when the system attempts to stop hardware operations, resulting in a Denial of Service (DoS) that crashes the system.
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Description OSIDB Bzimport 2026-03-25 11:07:07 UTC 
In the Linux kernel, the following vulnerability has been resolved:

accel/amdxdna: Fix NULL pointer dereference of mgmt_chann

mgmt_chann may be set to NULL if the firmware returns an unexpected
error in aie2_send_mgmt_msg_wait(). This can later lead to a NULL
pointer dereference in aie2_hw_stop().

Fix this by introducing a dedicated helper to destroy mgmt_chann
and by adding proper NULL checks before accessing it.
Comment 1 Alexander B 2026-03-25 13:14:37 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026032532-CVE-2026-23328-9600@gregkh/T