Bug 2516287 (CVE-2026-72182)

Summary: CVE-2026-72182 kernel: power: supply: charger-manager: fix refcount leak in is_full_charged()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's power supply charger-manager component. A reference count (refcount) leak occurs within the `is_full_charged()` function. This happens when a reference to the fuel gauge power supply is obtained but not properly released if a specific voltage check succeeds. This resource leak could potentially lead to system instability or a denial of service.
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Description OSIDB Bzimport 2026-08-15 06:04:37 UTC 
In the Linux kernel, the following vulnerability has been resolved:

power: supply: charger-manager: fix refcount leak in is_full_charged()

In is_full_charged(), power_supply_get_by_name() is called to
obtain a reference to the fuel_gauge power supply. If the
voltage check (uV >= desc->fullbatt_uV) succeeds, the function
returns true directly without releasing the reference, leaking
the refcount.

Fix this by setting a flag and jumping to the out label where
power_supply_put() properly drops the reference.
Comment 1 gkamathe 2026-08-18 05:17:08 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026081540-CVE-2026-72182-39e5@gregkh/T