CVE-2026-81017: Linux kernel · platform/chrome: sensorhub: Bound the EC-reported sensor number
Affects Linux kernelSource GCVE Database
Not known to be exploited · CVSS 8.4 High.
Data as of 26 Oct 2026, 12:55 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 11 Sep 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 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther 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 has been implemented that validates the sensor number before processing events, dropping malformed events early. Users should apply the official Linux kernel update containing this fix once available. No additional mitigation steps are indicated.
Description
In the Linux kernel, the following vulnerability has been resolved: platform/chrome: sensorhub: Bound the EC-reported sensor number Each EC FIFO event carries an 8-bit sensor number (in->sensor_num). cros_ec_sensorhub_ring_handler() validates the FIFO event count, the per-read count and the ring bound, but not the sensor number, which cros_ec_sensor_ring_process_event() then uses unchecked to index sensorhub->batch_state[] - allocated with only sensorhub->sensor_num entries. A sensor number of sensor_num or larger is an out-of-bounds read and write of batch_state[]. Validate the sensor number in the ring handler, where each event is read from the EC, and drop a malformed event before it is used.
References
- nvd.nist.gov/vuln/detail/CVE-2026-81017 (opens in a new tab)
- git.kernel.org/stable/c/3d2636dce0a8fe9eecad29010699847be425dc80 (opens in a new tab)
- git.kernel.org/stable/c/4d9bf63ed74f859c6698bc01d8fb216ef9253867 (opens in a new tab)
- git.kernel.org/stable/c/5eaf7faa99578ae090030d1e2e6ea3b37a615496 (opens in a new tab)
- git.kernel.org/stable/c/833740a2333c2e4db4e02e3d0ffba04e8718a5f3 (opens in a new tab)
- ubuntu.com/security/CVE-2026-81017 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-81017 (opens in a new tab)
- git.kernel.org/linus/833740a2333c2e4db4e02e3d0ffba04e8718a5f3 (opens in a new tab)