Linux Kernel up to 7.2.6/7.3-rc1 amdxdna amdxdna_cmd_set_error information disclosure

Summaryinfo

A vulnerability was found in Linux Kernel up to 7.2.6/7.3-rc1. It has been declared as problematic. Affected by this issue is the function amdxdna_cmd_set_error of the component amdxdna. Such manipulation leads to information disclosure. This vulnerability is uniquely identified as CVE-2026-98144. Local access is required to approach this attack. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 7.2.6/7.3-rc1 and classified as problematic. Affected by this issue is the function amdxdna_cmd_set_error of the component amdxdna. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: put the chained BO when its mapping fails amdxdna_cmd_set_error() looks up the first BO of a command chain, which takes a reference, and drops it at the end of the function. The mapping of that BO is established in between, and the failure path returns without the put, so the reference is leaked. Ordinary use does not reach it. The chain has been submitted before any of this runs, so aie2_cmdlist_fill_slot() has already called amdxdna_cmd_get_op() on that BO and amdxdna_gem_vmap() has cached its address. What makes it reachable is that the BO is resolved again by handle here, and the handle is userspace's to recycle: closing it after submission and importing a dma-buf whose exporter implements no vmap onto the same id leaves amdxdna_gem_get_obj() returning an object this cannot map, since prime_import() types every import AMDXDNA_BO_SHARE.

The advisory is available at git.kernel.org. This vulnerability is handled as CVE-2026-98144 since 09/25/2026. The exploitation is known to be easy. Local access is required to approach this attack. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 7.2.7 or 7.3-rc2 eliminates this vulnerability. Applying the patch eb90cb257e0792ac11f0347254bad3fc72417db6/7e33ba3a1d48c2d20ed270dec9d2d08332585c8e is able to eliminate this problem. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 7.2.0
• 7.2.1
• 7.2.2
• 7.2.3
• 7.2.4
• 7.2.5
• 7.2.6
• 7.3-rc1

License

• open-source

Website

• Vendor: https://www.kernel.org/

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