VulnerabilityPublished 23 Oct 2026

CVE-2026-99003: Linux kernel · drm/panthor: validate userspace queue count against initialized firmware slot count

Source GCVE Database

Authoritative record:CVE-2026-99003· Medium

Not known to be exploited · fixed in fdee3570b282a6c8699aea63fa5694355e010ec9 : update Linux kernel 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 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in fdee3570b282a6c8699aea63fa5694355e010ec9, ec86c43dcfff68eab4db9bdafcd3e2b16e342e18, 4487cf79bf173f2b426a02d102076f8a20d23b96 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 23 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-chr3-6fxw-gjw4

What to do

Upgrade Linux kernel to fdee3570b282a6c8699aea63fa5694355e010ec9, ec86c43dcfff68eab4db9bdafcd3e2b16e342e18, 4487cf79bf173f2b426a02d102076f8a20d23b96 or 9be126be5f78bc331a930295af97c9b1f9158f06.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ de85488138247d034eb3241840424a54d660926b, < fdee3570b282a6c8699aea63fa5694355e010ec9	Fixed in fdee3570b282a6c8699aea63fa5694355e010ec9
LinuxLinux	Affected ≥ de85488138247d034eb3241840424a54d660926b, < ec86c43dcfff68eab4db9bdafcd3e2b16e342e18	Fixed in ec86c43dcfff68eab4db9bdafcd3e2b16e342e18
LinuxLinux	Affected ≥ de85488138247d034eb3241840424a54d660926b, < 4487cf79bf173f2b426a02d102076f8a20d23b96	Fixed in 4487cf79bf173f2b426a02d102076f8a20d23b96
LinuxLinux	Affected ≥ de85488138247d034eb3241840424a54d660926b, < 9be126be5f78bc331a930295af97c9b1f9158f06	Fixed in 9be126be5f78bc331a930295af97c9b1f9158f06
LinuxLinux	Affected =6.10	Fixed in–

AI-suggested

A fix for this vulnerability has been implemented in the Linux kernel. Users should update to the patched kernel version once available. Since this is a kernel-level issue, applying the official kernel update is the recommended remediation.

Description

A vulnerability in the Linux kernel's drm/panthor driver was resolved that involved improper validation of the userspace queue count against the number of initialized firmware slots. Unprivileged userspace could request more queues than the firmware had initialized, leading to potential crashes due to dereferencing uninitialized stream interfaces.

References

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