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CVE-2026-89466

7.7 · HIGH

In the Linux kernel, the following vulnerability has been resolved: power: supply: qcom_battmgr: terminate the strings from firmware The qcom_battmgr_sc8280xp_strcpy() takes a Pascal-style string…

Published Sep 11, 2026EPSS 0.14%

Overview

CVE-2026-89466 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

power: supply: qcom_battmgr: terminate the strings from firmware

The qcom_battmgr_sc8280xp_strcpy() takes a Pascal-style string when the

firmware sends one. Otherwise it copies all BATTMGR_STRING_LEN bytes and

leaves the destination without a terminator.

Those destinations are model_number, serial_number and oem_info, each

BATTMGR_STRING_LEN and declared next to each other. They go out to user

space as val->strval, which power_supply_format_property() prints with

"%s", so a firmware string that fills the whole field makes that read run

into the following members.

Use strscpy() so the copy always terminates, the way the SM8350 path

already does for the same field.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0e70a9b0d16acf7adebc4f386178a95da27c0027Refgit.kernel.org/stable/c/6cc6c28c9ab6e8ecf901397717a5b391b828cdafRefgit.kernel.org/stable/c/ab1112df8f4ffa88cb024dd370c432ced80f77d8Refgit.kernel.org/stable/c/c06028db620854b11ad81b04b0a4e1ead930cb76Refgit.kernel.org/stable/c/ee053561e21ce1e1741dd64ca5ddcdb92e40edc1

How CyberStrike helps

Frequently asked questions

What is CVE-2026-89466?

CVE-2026-89466 is a high-severity vulnerability. It was published on September 11, 2026 and has a CVSS 3.1 base score of 7.7 (HIGH).

How severe is CVE-2026-89466?

This vulnerability has a CVSS 3.1 base score of 7.7, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-89466?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-89466?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-89466 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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