CVE-2026-99003: Linux kernel · drm/panthor: validate userspace queue count against initialized firmware slot count
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 28 Oct 2026, 01:58 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
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.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.10linuxpkg:deb/ubuntu/linux?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Ubuntu 26.10linux-oraclepkg:deb/ubuntu/linux-oracle?arch=source&distro=stonkingOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix for this vulnerability has been implemented in the Linux kernel panthor driver to properly validate the userspace queue count against the firmware-initialized slot count. Users should apply the updated kernel versions that include this fix. No additional mitigation steps are indicated.
Description
A vulnerability in the Linux kernel's panthor driver allows unprivileged userspace to request more queues than the firmware has initialized, potentially causing a crash due to dereferencing uninitialized memory. The flaw arises because the queue count validation checks against a hardcoded maximum rather than the actual number of firmware-initialized slots.
References
- ubuntu.com/security/CVE-2026-99003 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-99003 (opens in a new tab)
- git.kernel.org/stable/c/4487cf79bf173f2b426a02d102076f8a20d23b96 (opens in a new tab)
- git.kernel.org/stable/c/9be126be5f78bc331a930295af97c9b1f9158f06 (opens in a new tab)
- git.kernel.org/stable/c/ec86c43dcfff68eab4db9bdafcd3e2b16e342e18 (opens in a new tab)
- git.kernel.org/stable/c/fdee3570b282a6c8699aea63fa5694355e010ec9 (opens in a new tab)