What’s Vulnerable › Vulnerabilities

CVE-2026-98146: accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-25 · updated 2026-10-22
• Weakness: CWE-362

Description

In the Linux kernel, the following vulnerability has been resolved: accel/amdxdna: Remove __counted_by from struct amdxdna_cmd_chain struct amdxdna_cmd_chain contains a flexible array annotated with __counted_by(command_count). Since the structure is stored in shared AMDXDNA_BO_SHARE memory, userspace can modify command_count concurrently. If command_count is changed to zero, the bounds check generated from __counted_by may fail and trigger a kernel panic. Remove __counted_by to avoid relying on the userspace-controlled command_count for the flexible array bounds check.

Affected products

• Linux kernel: from 6.14 before 6.18.53; from 6.19 before 7.2.7; 7.3-rc1 — fixed in 6.18.53, 7.2.7

How to fix

Upgrade to a fixed version: Linux kernel 6.18.53, 7.2.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/52f3e086760a9a3e02a46a10b57caffd73b1c204
• https://git.kernel.org/stable/c/93fa3e925b15b0ded0a549fe7f12bfbb1c4e171a
• https://git.kernel.org/stable/c/b3709d354545e70388177500761f92d906c4dfd6

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