# CVE-2025-40340: drm/xe: Fix oops in xe_gem_fault when running core_hotunplug test.

CVE-2025-40340 is fixed in 18 products on 1 platform, first by DEBIAN-CVE-2025-40340, released December 9, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-40340
- Priority: High
- CVSS: 7.0 (Moderate)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 9, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-40340

## Description

In the Linux kernel, the following vulnerability has been resolved:  drm/xe: Fix oops in xe_gem_fault when running core_hotunplug test.  I saw an oops in xe_gem_fault when running the xe-fast-feedback testlist against the realtime kernel without debug options enabled.  The panic happens after core_hotunplug unbind-rebind finishes. Presumably what happens is that a process mmaps, unlocks because of the FAULT_FLAG_RETRY_NOWAIT logic, has no process memory left, causing ttm_bo_vm_dummy_page() to return VM_FAULT_NOPAGE, since there was nothing left to populate, and then oopses in "mem_type_is_vram(tbo->resource->mem_type)" because tbo->resource is NULL.  It's convoluted, but fits the data and explains the oops after the test exits.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dtb-aarch64 opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-64kb opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-64kb sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-azure opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.20.24.1 | [SUSE-SU-2026:0281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0281-1.md) | Jan 23, 2026 |
| Linux | kernel-azure sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-default opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-default sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-default-base opensuse-leap 16.0 | 6.12.0-160000.9.1.160000.2.6 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.28.1.150700.17.19.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-default-base sles 16.0 | 6.12.0-160000.9.1.160000.2.6 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-docs opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-docs sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-kvmsmall opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-kvmsmall sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_8 sles 15.7 | 1-150700.1.3.1 | [SUSE-SU-2026:0278-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0278-1.md) | Jan 23, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_8 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-obs-build opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-obs-qa opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-obs-qa sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-rt opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-source opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-source sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-source-azure sles 15.7 | 6.4.0-150700.20.24.1 | [SUSE-SU-2026:0281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0281-1.md) | Jan 23, 2026 |
| Linux | kernel-syms opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-syms sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-syms-azure sles 15.7 | 6.4.0-150700.20.24.1 | [SUSE-SU-2026:0281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0281-1.md) | Jan 23, 2026 |
| Linux | kernel-zfcpdump opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-zfcpdump sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.63-1 | [DEBIAN-CVE-2025-40340](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40340.md) | Dec 9, 2025 |
| Linux | linux Debian 14 | 6.17.8-1 | [DEBIAN-CVE-2025-40340](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40340.md) | Dec 9, 2025 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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