CVE-2026-98566: drm/imagination: clamp freelist reconstruction requests
In the Linux kernel, the following vulnerability has been resolved:
drm/imagination: clamp freelist reconstruction requests
The firmware reconstruction count controls accesses to the request's fixed freelist ID array and the copy into the fixed response array. Neither access currently bounds the count to those protocol arrays.
Clamp the count to the request capacity, which is shared by the response layout, and use that count consistently for reconstruction and response publication. Keep the firmware recovery exchange instead of dropping an oversized request without a response, as discussed with the firmware maintainer.
The issue was found by our static-analysis tool.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
ubuntu/linux-hwe-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-42.42~24.04.1 - Upgrade
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ubuntu/linux-riscv-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-42.42.1~24.04.1 - Upgrade
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ubuntu/linuxto a version that resolves this vulnerability.Fixed in 7.0.0-42.42 - Upgrade
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 7.0.0-1016.17 - Upgrade
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ubuntu/linux-gcpto a version that resolves this vulnerability.Fixed in 7.0.0-1016.18 - Upgrade
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ubuntu/linux-ibmto a version that resolves this vulnerability.Fixed in 7.0.0-1017.17 - Upgrade
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ubuntu/linux-oem-7.0to a version that resolves this vulnerability.Fixed in 7.0.0-1017.17 - Upgrade
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ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 7.0.0-1015.16 - Upgrade
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ubuntu/linux-riscvto a version that resolves this vulnerability.Fixed in 7.0.0-42.42.1 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.12.112 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 6.18.55 - Upgrade
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linux/Kernelto a version that resolves this vulnerability.Fixed in 7.2.9 - Compensating control
Clamp the firmware freelist reconstruction count to the request capacity shared by the response layout, and use the clamped count consistently for reconstruction and response publication while preserving the firmware recovery exchange.
Event History
Frequently Asked Questions
Which systems are in scope?
The issue is in the Linux kernel's drm/imagination component. The provided information does not identify affected kernel versions or specific hardware configurations.
What does the fix do when firmware supplies an oversized reconstruction count?
It clamps the count to the request array capacity, which is also shared by the response layout. The firmware recovery exchange is still performed rather than dropping the request without a response.