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CVE-2025-39807 (GCVE-0-2025-39807)

Vulnerability from cvelistv5 – Published: 2025-09-16 13:00 – Updated: 2026-05-23 16:00
VLAI
Title
drm/mediatek: Add error handling for old state CRTC in atomic_disable
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: Add error handling for old state CRTC in atomic_disable Introduce error handling to address an issue where, after a hotplug event, the cursor continues to update. This situation can lead to a kernel panic due to accessing the NULL `old_state->crtc`. E,g. Unable to handle kernel NULL pointer dereference at virtual address Call trace: mtk_crtc_plane_disable+0x24/0x140 mtk_plane_atomic_update+0x8c/0xa8 drm_atomic_helper_commit_planes+0x114/0x2c8 drm_atomic_helper_commit_tail_rpm+0x4c/0x158 commit_tail+0xa0/0x168 drm_atomic_helper_commit+0x110/0x120 drm_atomic_commit+0x8c/0xe0 drm_atomic_helper_update_plane+0xd4/0x128 __setplane_atomic+0xcc/0x110 drm_mode_cursor_common+0x250/0x440 drm_mode_cursor_ioctl+0x44/0x70 drm_ioctl+0x264/0x5d8 __arm64_sys_ioctl+0xd8/0x510 invoke_syscall+0x6c/0xe0 do_el0_svc+0x68/0xe8 el0_svc+0x34/0x60 el0t_64_sync_handler+0x1c/0xf8 el0t_64_sync+0x180/0x188 Adding NULL pointer checks to ensure stability by preventing operations on an invalid CRTC state.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 18:14 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 40b5b4ba8ed87c0bfb6268c10589777652ebde4c , < 7d5cc22efa44e0fe321ce195c71c3d7da211fbb2 (git)
Affected: d208261e9f7c66960587b10473081dc1cecbe50b , < 9a94e9d8b50bcfe89693bc899a54d3866d86e973 (git)
Affected: d208261e9f7c66960587b10473081dc1cecbe50b , < 0c6b24d70da21201ed009a2aca740d2dfddc7ab5 (git)
Affected: a9c482689051ca96f4a4630fe49fd6919694caaa (git)
Affected: 6.12.40 , < 6.12.45 (semver)
Affected: 6.15.8 , < 6.16 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.16
Unaffected: 0 , < 6.16 (semver)
Unaffected: 6.12.45 , ≤ 6.12.* (semver)
Unaffected: 6.16.5 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: drm/mediatek: Add error handling for old state CRTC in atomic_disable",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39807.json",
      "version": "3"
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      "current_release_date": "2026-09-11T01:58:34Z",
      "cve": "CVE-2025-39807",
      "id": "CVE-2025-39807",
      "initial_release_date": "2025-09-17T23:23:28Z",
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      "product_status:recommended": "247",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-39807",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-39807.json",
      "version": "40"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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