power: supply: max17040: handle missing status supplier

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Summary

CVECVE-2026-80711
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 08:16:56 UTC
Updated2026-08-28 08:16:56 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: power: supply: max17040: handle missing status supplier MAX17040 does not report charger state itself, so the driver forwards POWER_SUPPLY_PROP_STATUS to a supplier power supply. If no supplier is registered, power_supply_get_property_from_supplier() returns -ENODEV and leaves the output value untouched. max17040_get_property() currently ignores that error and returns success, so userspace can read an uninitialized status value from the battery power supply. This happens on systems that use the fuel gauge without a charger supplier relationship in firmware. Return POWER_SUPPLY_STATUS_UNKNOWN when no supplier provides STATUS, and propagate other supplier lookup errors.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f4b782af61ae7bbf93008d5809b0e3a8ac2bb88e 91ac995a6f4ddf4f92b231b080544abf23a9b871 git Not specified
CNA Linux Linux affected f4b782af61ae7bbf93008d5809b0e3a8ac2bb88e b039f13e095d28a64ca6b21d0ee5440d8b048f37 git Not specified
CNA Linux Linux affected f4b782af61ae7bbf93008d5809b0e3a8ac2bb88e ee2ea0c452edc0930e7395b080dccd5a1cb965e1 git Not specified
CNA Linux Linux affected f4b782af61ae7bbf93008d5809b0e3a8ac2bb88e 725668c6b6aa3971fe850659102c250d0d676e18 git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 semver Not specified
CNA Linux Linux unaffected 6.12.103 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/b039f13e095d28a64ca6b21d0ee5440d8b048f37 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ee2ea0c452edc0930e7395b080dccd5a1cb965e1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/725668c6b6aa3971fe850659102c250d0d676e18 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/91ac995a6f4ddf4f92b231b080544abf23a9b871 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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