CVE-2026-89729 (CVSS 8.8)

Description

In the Linux kernel, the following vulnerability has been resolved: HID: sensor-hub: Fix out-of-bounds write in sensor_hub_get_feature sensor_hub_get_feature() clamps its return value to the caller's buffer size, but the copy loop still copies field->report_size / 8 bytes for each report value. A malicious HID descriptor can advertise a large feature field size while an IIO caller supplies a small stack buffer, such as a single s32, causing an out-of-bounds write. HID core stores parsed report values in __s32 slots and clamps extracted values to 32 bits. Reject feature fields that require more than one slot per value, guard the total byte count calculation, and clamp each per-value copy to the remaining caller buffer.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0035

Probability of exploitation

0.29%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/1c0463f0f028801a933f090cd2695f132635b374 https://git.kernel.org/stable/c/4145aa149a32e4b35d5d47e380d0c6c438b4e6fe https://git.kernel.org/stable/c/8bf8aaf2f74de64f801eb30bc38927dba1f8e40a https://git.kernel.org/stable/c/9f43499ce6458a572b781f6bb46c464ab59fa825 https://git.kernel.org/stable/c/bc3d72c44bff17688dc5f3e5132a53b51dae0f04 https://git.kernel.org/stable/c/c5c60260a07e627084e792ea959ab468ccfa4d50 https://git.kernel.org/stable/c/c92693f3ed099401d0383ef35ca1fe1e6ba033de https://git.kernel.org/stable/c/fa95b14198b6c8ea721b4784f466d3c2c2bac83a

Frequently Asked Questions

What is CVE-2026-89729? +

In the Linux kernel, the following vulnerability has been resolved: HID: sensor-hub: Fix out-of-bounds write in sensor_hub_get_feature sensor_hub_get_feature() clamps its return value to the caller's buffer size, but the copy loop still copies field->report_size / 8 bytes for each report value. A malicious HID descriptor can advertise a large feature field size while an IIO caller supplies a small stack buffer, such as a single s32, causing an out-of-bounds write. HID core stores parsed report values in __s32 slots and clamps extracted values to 32 bits. Reject feature fields that require more than one slot per value, guard the total byte count calculation, and clamp each per-value copy to the remaining caller buffer. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-89729? +

CVE-2026-89729 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0035, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-89729? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-89729