CVE-2026-98785 - Vulnerability Details

- drm/amd/display: check dc_state_create_copy() for NULL in dm_suspend

Description

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: check dc_state_create_copy() for NULL in dm_suspend

dc_state_create_copy() can return NULL on allocation failure.
dm_suspend() only conditionally skips dm_gpureset_toggle_interrupts()
and continues execution, returning success. dm_resume() then
dereferences the NULL cached_dc_state in link_enc_cfg_copy() and the
following dc_state->stream_count loop, crashing during GPU reset
recovery.

Return -ENOMEM immediately if the copy fails, so the caller aborts
suspend instead of leaving a NULL cached state for resume.

(cherry picked from commit 84b6d7932fdd2857795a257f9f258562a3cddcab)

Published: 2026-10-18

Score: 4.7 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Impact

The defect permits a null pointer dereference in the AMD display driver’s suspend path. When the dm_suspend routine fails to allocate a copy of the dc_state, it continues execution and later the dm_resume path dereferences the resulting NULL pointer while restoring GPU state. This leads to a kernel panic during GPU reset recovery, forcing a system reboot and loss of service availability.

Affected Systems

The vulnerability is present in Linux kernel builds that include the AMD display driver (drm/amd). No specific kernel version ranges are provided, so all current kernel releases that have not applied the commit that introduced the null check are potentially affected.

Risk and Exploitability

The EPSS score is very low (< 1%) and the vulnerability is not listed in the CISA KEV catalog, indicating no known active exploitation at this time. The CVSS score is 4.7. Based on the description, the likely attack vector requires control over the system’s power‑management or suspend sequence, which typically requires privileged access. The impact is a denial‑of‑service crash during GPU reset recovery, forcing a system reboot and loss of service availability.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`d0b8b23b9c2ebec693a36fea518d8f13493ad655`	affected	< ed65678bb23a5f5040932960851ac39bdeafb765
`83c7f509ef087041604e9572938f82e18b724c9d`	affected	< 0b24f9d4e6e8ab64da8f2ae85bd1790d0f6a596f
`4cc2a94d96caeb3c975acdae7351c2f997c32175`	affected	< 29302964ef583f3a57efc3c990bc0a71337bd3a4
`8092aa3ab8f7b737a34b71f91492c676a843043a`	affected	< 686baa1f4ec43b33e39e3d4b4a4539a91d17e883
`8092aa3ab8f7b737a34b71f91492c676a843043a`	affected	< 197946faa1b7968046ba475ae2f266847c6f51ed
`8092aa3ab8f7b737a34b71f91492c676a843043a`	affected	< 7283b78ca07ce491984a63f6288f3f8de5bdcb22
`8092aa3ab8f7b737a34b71f91492c676a843043a`	affected	< 015e72cde567d2450e282c2790773463156b2d0a
`ea000e4b4ee5363997715531cb3d024b4e5d561c`	affected	—
`1686675405d07f35eae7ff3d13a530034b899df2`	affected	—
`5.15.165`	affected	< 5.15.224
`6.1.105`	affected	< 6.1.191
`6.6.46`	affected	< 6.6.160
`5.10.258`	affected	< 5.11
`6.10.5`	affected	< 6.11

Linux

affected

Version	Status	Constraints
`6.11`	affected	—
`0`	unaffected	< 6.11
`5.15.224`	unaffected	≤ 5.15.*
`6.1.191`	unaffected	≤ 6.1.*
`6.6.160`	unaffected	≤ 6.6.*
`6.12.113`	unaffected	≤ 6.12.*
`6.18.56`	unaffected	≤ 6.18.*
`7.2.10`	unaffected	≤ 7.2.*
`7.3`	unaffected	≤ *

No data.

Vendor Product Confidence Versions

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`[8092aa3ab8f7b737a34b71f91492c676a843043a,686baa1f4ec43b33e39e3d4b4a4539a91d17e883)`	affected	code_commit	—
`[8092aa3ab8f7b737a34b71f91492c676a843043a,197946faa1b7968046ba475ae2f266847c6f51ed)`	affected	code_commit	—
`[8092aa3ab8f7b737a34b71f91492c676a843043a,7283b78ca07ce491984a63f6288f3f8de5bdcb22)`	affected	code_commit	—
`[8092aa3ab8f7b737a34b71f91492c676a843043a,015e72cde567d2450e282c2790773463156b2d0a)`	affected	code_commit	—
`ea000e4b4ee5363997715531cb3d024b4e5d561c`	affected	code_commit	—
`d0b8b23b9c2ebec693a36fea518d8f13493ad655`	affected	code_commit	—
`83c7f509ef087041604e9572938f82e18b724c9d`	affected	code_commit	—
`4cc2a94d96caeb3c975acdae7351c2f997c32175`	affected	code_commit	—
`1686675405d07f35eae7ff3d13a530034b899df2`	affected	code_commit	—
`[5.10.258,5.11)`	affected	semver	—
`[5.15.165,5.16)`	affected	semver	—
`[6.1.105,6.2)`	affected	semver	—
`[6.6.46,6.7)`	affected	semver	—
`[6.10.5,6.11)`	affected	semver	—

Linux

Linux Kernel

99%

Version	Status	Scheme	Platform
`6.11`	affected	semver	—
`[0,6.11)`	unaffected	semver	—
`[6.12.113,6.12.*]`	unaffected	semver	—
`[6.18.56,6.18.*]`	unaffected	semver	—
`[7.2.10,7.2.*]`	unaffected	semver	—
`[7.3,*]`	unaffected	generic	—

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Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Update the Linux kernel to a release that includes the fix for the null pointer check in dm_suspend.
If a newer kernel cannot be installed, backport the commit that adds an immediate -ENOMEM return on allocation failure to the current kernel source and rebuild the kernel.
As a temporary measure, disable GPU suspend for AMD devices by setting the kernel parameter "acpi_backlight=legacy" or modifying the power‑management configuration to avoid triggering dm_suspend during suspend/resume cycles.

Generated by OpenCVE AI on October 23, 2026 at 18:48 UTC.

Tracking

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Advisories

Source	ID	Title
Debian DLA	DLA-4850-1	linux-6.12 security update

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00186.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98785.mbox
https://git.kernel.org/stable/c/015e72cde567d2450e282c2790773463156b2d0a
https://git.kernel.org/stable/c/0b24f9d4e6e8ab64da8f2ae85bd1790d0f6a596f
https://git.kernel.org/stable/c/197946faa1b7968046ba475ae2f266847c6f51ed
https://git.kernel.org/stable/c/29302964ef583f3a57efc3c990bc0a71337bd3a4
https://git.kernel.org/stable/c/686baa1f4ec43b33e39e3d4b4a4539a91d17e883
https://git.kernel.org/stable/c/7283b78ca07ce491984a63f6288f3f8de5bdcb22
https://git.kernel.org/stable/c/ed65678bb23a5f5040932960851ac39bdeafb765
https://nvd.nist.gov/vuln/detail/CVE-2026-98785
https://www.cve.org/CVERecord?id=CVE-2026-98785

History

Fri, 30 Oct 2026 13:00:00 +0000

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/0b24f9d4e6e8ab64da8f2ae85bd1790d0f6a596f https://git.kernel.org/stable/c/ed65678bb23a5f5040932960851ac39bdeafb765

Fri, 23 Oct 2026 12:30:00 +0000

Type	Values Removed	Values Added
References		https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98785.mbox https://nvd.nist.gov/vuln/detail/CVE-2026-98785 https://www.cve.org/CVERecord?id=CVE-2026-98785
Metrics	threat_severity `None`	cvssV3_1 `{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Moderate`

Wed, 21 Oct 2026 13:15:00 +0000

Type	Values Removed	Values Added
References		https://git.kernel.org/stable/c/29302964ef583f3a57efc3c990bc0a71337bd3a4

Sun, 18 Oct 2026 22:00:00 +0000

Type	Values Removed	Values Added
Weaknesses		CWE-476

Sun, 18 Oct 2026 16:00:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: check dc_state_create_copy() for NULL in dm_suspend dc_state_create_copy() can return NULL on allocation failure. dm_suspend() only conditionally skips dm_gpureset_toggle_interrupts() and continues execution, returning success. dm_resume() then dereferences the NULL cached_dc_state in link_enc_cfg_copy() and the following dc_state->stream_count loop, crashing during GPU reset recovery. Return -ENOMEM immediately if the copy fails, so the caller aborts suspend instead of leaving a NULL cached state for resume. (cherry picked from commit 84b6d7932fdd2857795a257f9f258562a3cddcab)
Title		drm/amd/display: check dc_state_create_copy() for NULL in dm_suspend
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/015e72cde567d2450e282c2790773463156b2d0a https://git.kernel.org/stable/c/197946faa1b7968046ba475ae2f266847c6f51ed https://git.kernel.org/stable/c/686baa1f4ec43b33e39e3d4b4a4539a91d17e883 https://git.kernel.org/stable/c/7283b78ca07ce491984a63f6288f3f8de5bdcb22

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2026-10-18T15:48:22.111Z

Updated: 2026-10-30T12:39:49.489Z

Reserved: 2026-09-25T10:25:14.370Z

Link: CVE-2026-98785

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-10-18T16:17:32.467

Modified: 2026-10-30T13:21:27.880

Link: CVE-2026-98785

Redhat

Severity : Moderate

Publid Date: 2026-10-18T00:00:00Z

Links: CVE-2026-98785 - Bugzilla

OpenCVE Enrichment

Updated: 2026-10-23T19:00:23Z

Weaknesses

CWE-476
NULL Pointer Dereference

Impact

Affected Systems

Risk and Exploitability

Tracking

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Subscriptions

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