Bug 2482137 (CVE-2025-71308)

Summary: CVE-2025-71308 kernel: accel/amdxdna: Fix potential NULL pointer dereference in context cleanup
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel's accel/amdxdna module. During error handling in the `aie2_create_context()` function, the `aie_destroy_context()` function can be called when a mailbox channel pointer is unexpectedly null. This can lead to a NULL pointer dereference, potentially causing a system crash and resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2026-05-27 15:13:06 UTC 
In the Linux kernel, the following vulnerability has been resolved:

accel/amdxdna: Fix potential NULL pointer dereference in context cleanup

aie_destroy_context() is invoked during error handling in
aie2_create_context(). However, aie_destroy_context() assumes that the
context's mailbox channel pointer is non-NULL. If mailbox channel
creation fails, the pointer remains NULL and calling aie_destroy_context()
can lead to a NULL pointer dereference.

In aie2_create_context(), replace aie_destroy_context() with a function
which request firmware to remove the context created previously.
Comment 1 Keith Grant 2026-05-28 20:17:23 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026052707-CVE-2025-71308-f05e@gregkh/T