CVE-2026-98786

drm/amd/display: guard dc_sink dereferences in MST mode validation

Products / packages Linux

Published 18/10/2026, 15:48:22 UTC

Severity and exploitation

Not in CISA KEVNo CVSS score

KEV coverage does not rule out exploitation.

KEV checked 14/11/2026, 21:05:32 UTC

Severity

unknown

CVSS measures technical severity, not the likelihood of an attack.

Known exploitation

Not listed in the checked CISA KEV catalog

Absence from CISA KEV does not rule out attacks.

Public exploit

Not established by this record

Missing evidence does not mean no public exploit exists.

Remediation

Fix status not established

No structured fix or guidance is available here. Check the latest publisher advisory.

What this means

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

Source excerpt · Linux

Attack conditions

No attack-condition excerpt has been identified here. Review the full source description and references for authentication, network access, and configuration requirements.

Review supporting sources →

Affected versions

Check the exact model, release, and any platform requirements against your installation.

Linux · Linux

Linux

4 ranges

Linux version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

f04d275d94e164d24516c32437c988a323018f63 → before 0189f725242087679bc9f1bbf77ad086f56a72c8

git versions

f04d275d94e164d24516c32437c988a323018f63 → before 5684a6c24c0d7c40ef2c4ccb3e4a64cffe76a791

git versions

f04d275d94e164d24516c32437c988a323018f63 → before daa0437fe5e451856aaf8fda602a9fc2105bbd54

git versions

f04d275d94e164d24516c32437c988a323018f63 → before 217f64f348c90cba62164e7ff38e0ccf78a5ca09

git versions

Other versions: unaffected

Linux · Linux

Linux

6 ranges

Linux version evidence

Check a product version

Compare with this publisher’s ranges. This does not inspect your installation.

affected

6.0

unaffected

0 → before 6.0

semver versions

6.12.117 → through 6.12.*

semver versions

6.18.61 → through 6.18.*

semver versions

7.2.10 → through 7.2.*

semver versions

7.3 → through *

original_commit_for_fix versions

Other versions: affected

Automatic dependency matching is unavailable for this record. Use the product evidence and publisher’s instructions to check your installation.

What to do

Compare your installed product and version with the affected versions above. A matching product name alone does not confirm exposure.

No structured fix or remediation guidance is available here. Check the full source description and vendor’s latest advisory for a patch or workaround; do not assume another version is safe.

cve.new guidance unless attributed to a publisher. This page does not inspect your installation.

Public exploit evidence

No public exploit reference is identified in the imported evidence. This is not a claim that no exploit exists.

Original source description

Read the full publisher description

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

drm/amd/display: guard dc_sink dereferences in MST mode validation

dm_dp_mst_is_port_support_mode() reads aconnector->dc_sink->dsc_caps... for the DSC branch-throughput check, and get_conv_frl_bw()'s HDMI-PCON FRL-bandwidth path reads aconnector->dc_sink->edid_caps.max_frl_rate, both without a NULL check. dc_sink is cleared asynchronously on MST unplug, and both functions run from paths that the driver's own comments document as racing that teardown: the connector probe worker's ->mode_valid callback and a compositor's atomic check, neither of which holds the MST manager lock that the teardown path uses. The former does have an existing dsc_aux NULL check, but dsc_aux isn't reliably cleared in every path that clears dc_sink, so it doesn't cover this.

Fail the port-support check and skip the FRL conversion path when the sink is already gone.

(cherry picked from commit 7c3db8da4e039698ae198c870712428644e965c7)

References

4 sources

git.kernel.org/stable/c/0189f725242087679bc9f1bbf77ad086f56a72c8

Source referenceLinux

git.kernel.org/stable/c/5684a6c24c0d7c40ef2c4ccb3e4a64cffe76a791

Source referenceLinux

git.kernel.org/stable/c/daa0437fe5e451856aaf8fda602a9fc2105bbd54

Source referenceLinux

git.kernel.org/stable/c/217f64f348c90cba62164e7ff38e0ccf78a5ca09

Source referenceLinux

Inside the record

Evidence available

Package identity · not supplied

Version evidence

Remediation guidance · not supplied

Weakness classification · not supplied

Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-98786

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Environment requirements

These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.

Linux · platform conditions

Any condition may hold

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.0

After:

Through (inclusive):

Before: 6.12.117

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.0

After:

Through (inclusive):

Before: 6.18.61

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.0

After:

Through (inclusive):

Before: 7.2.10

Vulnerable product

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

From (inclusive): 6.0

After:

Through (inclusive):

Before: 7.3

Applicability preview

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Contributing organizations · 1

Linux

Assigning organization

2026-11-10

Timeline

All times UTC

18 Oct 2026, 15:48
Advisory published
Publication date supplied by the source.
10 Nov 2026, 18:15
Source updated
Latest modification date supplied by the source.
10 Nov 2026, 18:25
Last imported by cve.new
Latest catalog import, not the date we first saw this advisory.

What changed

Follow changes

CVE · CVE-2026-987862026-11-10

Observed 2026-11-10T18:25:20.886Z · upstream updated 2026-11-10T18:15:19.556Z

Product or version evidence changed

before

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after

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References changed

before

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after

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Environment requirements changed

before

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after

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Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

Reading the signals

Severity · CVSS: Technical impact and attack conditions. No numeric assessment supplied.
Observed exploitation · KEV: An absent or unavailable KEV listing does not establish that exploitation has not occurred.
Predicted exploitation · EPSS: 0.15% estimated probability in the next 30 days. 2026-11-06 · FIRST EPSS.

Record identifiers

Aliases: None recorded

Source evidence

Request a correction or dispute

Start with the assigning organization for this record. Include the CVE ID, the disputed information, and supporting evidence. A dispute does not itself reject a record.

Find the responsible CNA →Official dispute and escalation process ↗

CVE CVE-2026-98786

Enrichment coverage

NVDAvailable

Checked 07/11/2026, 02:30:41 UTC

GHSAAvailable

Checked 07/11/2026, 02:30:40 UTC

EUVDAvailable

Checked 07/11/2026, 02:30:40 UTC

EPSSAvailable

Checked 07/11/2026, 02:30:40 UTC

Additional source evidence

ENISA EUVD · EUVD-2026-103871Checked 07/11/2026, 02:30:40 UTC

FIRST EPSS · CVE-2026-98786

EPSS 0.15% probability of exploitation in the next 30 days. Percentile: 4.70% · 2026-11-06

Checked 07/11/2026, 02:30:40 UTC

GitHub Advisory Database · GHSA-7r8j-xcf8-cxq6Checked 07/11/2026, 02:30:40 UTC

NVD · CVE-2026-98786Checked 07/11/2026, 02:30:41 UTC

Sponsored by MoxsoBuild security habits with adaptive training and phishing simulations.View as JSON

drm/amd/display: guard dc_sink dereferences in MST mode validation

Severity and exploitation

What this means

Attack conditions

Affected versions

Linux

affected

unaffected

unknown

Linux

affected

unaffected

unknown

What to do

Public exploit evidence

Original source description

References

Inside the record

Evidence available

Original records

Environment requirements

Timeline

Advisory published

Source updated

Last imported by cve.new

What changed