power: supply: qcom_battmgr: terminate the strings from firmware (CVE-2026-89466) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89466

power: supply: qcom_battmgr: terminate the strings from firmware

Answer in brief

CVE-2026-89466 records a Unknown severity vulnerability in power: supply: qcom_battmgr: terminate the strings from firmware. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Sep 11, 2026Source checked Sep 11, 2026First seen by HOL Sep 11, 2026Material review Sep 11, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=29e8142b5623b5949587bcc4f591c4e6595c4aca <0e70a9b0d16acf7adebc4f386178a95da27c0027 \|\| >=29e8142b5623b5949587bcc4f591c4e6595c4aca <ee053561e21ce1e1741dd64ca5ddcdb92e40edc1 \|\| >=29e8142b5623b5949587bcc4f591c4e6595c4aca <6cc6c28c9ab6e8ecf901397717a5b391b828cdaf \|\| >=29e8142b5623b5949587bcc4f591c4e6595c4aca <ab1112df8f4ffa88cb024dd370c432ced80f77d8	0e70a9b0d16acf7adebc4f386178a95da27c0027, ee053561e21ce1e1741dd64ca5ddcdb92e40edc1, 6cc6c28c9ab6e8ecf901397717a5b391b828cdaf, ab1112df8f4ffa88cb024dd370c432ced80f77d8
Linux/Linuxgeneric	6.3	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 0e70a9b0d16acf7adebc4f386178a95da27c0027 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 11, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.