VulnerabilityPublished 18 Oct 2026

CVE-2026-98786: Linux kernel · drm/amd/display: guard dc_sink dereferences in MST mode validation

Source GCVE Database

Authoritative record:CVE-2026-98786· Medium

Not known to be exploited : upgrade to daa0437fe5e451856aaf8fda602a9fc2105bbd54 or 217f64f348c90cba62164e7ff38e0ccf78a5ca09 when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in daa0437fe5e451856aaf8fda602a9fc2105bbd54, 217f64f348c90cba62164e7ff38e0ccf78a5ca09

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-7r8j-xcf8-cxq6

What to do

Upgrade Linux kernel to daa0437fe5e451856aaf8fda602a9fc2105bbd54 or 217f64f348c90cba62164e7ff38e0ccf78a5ca09.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ f04d275d94e164d24516c32437c988a323018f63, < daa0437fe5e451856aaf8fda602a9fc2105bbd54	Fixed in daa0437fe5e451856aaf8fda602a9fc2105bbd54
LinuxLinux	Affected ≥ f04d275d94e164d24516c32437c988a323018f63, < 217f64f348c90cba62164e7ff38e0ccf78a5ca09	Fixed in 217f64f348c90cba62164e7ff38e0ccf78a5ca09
LinuxLinux	Affected =6.0	Fixed in–

AI-suggested

A fix has been applied to the Linux kernel to add proper NULL checks on dc_sink dereferences during MST mode validation. Users should update to the patched kernel version containing commit 7c3db8da4e039698ae198c870712428644e965c7 or later. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's AMD display driver (drm/amd/display) involving improper NULL checks on dc_sink dereferences during MST mode validation has been resolved. The flaw occurs because functions accessing dc_sink fields do so without verifying if dc_sink is NULL, leading to potential race conditions during MST unplug events. The fix ensures that port-support checks fail and skip certain processing paths when the sink is no longer present.

References

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