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CVE-2026-80915— drm/xe: Fix DPT allocation paths.

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： drm/xe：修复 DPT 分配路径。 1. 移除了从 VRAM 回退到系统内存的逻辑。经测试，该回退机制完全不起作用，仅观察到黑屏以及管道故障（pipe fault）错误。 2. 在带有媒体 GT 的系统上，当 GT 处于 MC6 电源状态时，访问 stolen 内存会产生额外延迟。此外，由于我们没有统计 stolen 内存的使用量，理论上 DPT 可能会占满整个 stolen 区域。因此，应避免使用 stolen 内存，仅使用默认内存区域进行分配。 3. 使用 st

AI Predicted 5.5 Difficulty: Hard

Possible ATT&CK Techniques 2 AI

T1081 T1201 · Password Policy Discovery

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 775d0adc01a55fe0458139330415d86bb3533efe< 491c499295fb0b90308b230b0a1075dcdf7f4d12 affected
775d0adc01a55fe0458139330415d86bb3533efe< f03415030579163f791c978741af7f1f2f6510b7 affected
775d0adc01a55fe0458139330415d86bb3533efe< c457e2c845ccbf2224386029f3da4937ba424db0 affected
775d0adc01a55fe0458139330415d86bb3533efe< fc648757908304aedbad74f74bf58192aec383db affected
4854ac2f88e2168ee4da2b152c6711772a8149aa affected
6.11.3< 6.12 affected
6.12 affected
< 6.12 unaffected
… +4 more rows
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I. Basic Information for CVE-2026-80915

Vulnerability Information
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Vulnerability Title
drm/xe: Fix DPT allocation paths.
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Fix DPT allocation paths. Remove the fallback for VRAM to system memory, I tested it and that doesn't work at all, only a black screen with pipe fault errors were observed. On systems with media GT, extra latency is added when accessing stolen memory when the GT is in MC6. Since we additionally aren't counting how much memory is used for stolen and we could in theory fill up the entire stolen area with DPT's, avoid using stolen and only use the default memory region. Using stolen may also result in random system hangs under load. (cherry picked from commit a196406a3831291598fe8e73245914f7acffdfe0)
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 775d0adc01a55fe0458139330415d86bb3533efe ~ 491c499295fb0b90308b230b0a1075dcdf7f4d12 -
Linux Linux 6.12 -

II. Public POCs for CVE-2026-80915

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III. Intelligence Information for CVE-2026-80915

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Patches & Fixes for CVE-2026-80915 (4)

Same Patch Batch · Linux · 2026-09-09 · 12 CVEs total

CVE-2026-80925 vlan: fix skb_under_panic and races when toggling HW VLAN offload
CVE-2026-80924 crypto: krb5 - use kfree_sensitive() for derived key buffers
CVE-2026-80923 xhci: dbgtty: Fix unregister on tty_register_driver() failure
CVE-2026-80922 crypto: qcom-rng - Allow zero as a random number
CVE-2026-80921 KVM: s390: vsie: zero stale crypto bits
CVE-2026-80920 io_uring: defer eventfd signaling when queued from a wakeup handler
CVE-2026-80919 drm/amdgpu: fix recursive ww_mutex acquire in amdgpu_devcoredump_format
CVE-2026-80918 HID: core: fix number/pointer type confusion on long items
CVE-2026-80917 PCI: host-generic: Fix NULL pointer dereference on 32-bit CAM systems
CVE-2026-80916 kcov: fix data corruption and race conditions on PREEMPT_RT
CVE-2026-80914 Bluetooth: ISO: fix use-after-free of listener socket in iso_conn_ready

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-80915

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