pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy()

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Summary

CVECVE-2026-46308
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-08 17:16:49 UTC
Updated2026-06-08 17:16:49 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: pmdomain: mediatek: fix use-after-free in scpsys_get_bus_protection_legacy() In scpsys_get_bus_protection_legacy(), of_find_node_with_property() returns a device node with its reference count incremented. The function then calls of_node_put(node) before checking whether syscon_regmap_lookup_by_phandle() returns an error. If an error occurs, dev_err_probe() dereferences the node pointer to print diagnostic information, but the node memory may have already been freed due to the earlier of_node_put(), leading to a use-after-free vulnerability. Fix this by moving the of_node_put() call after the error check, ensuring the node is still valid when accessed in the error path.

Risk And Classification

EPSS: 0.001540000 probability, percentile 0.048980000 (date 2026-06-15)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c29345fa5f66bea0790cf2219f57b974d4fc177b cb27e43c0511e9e1ca8818d231656070b11c18cf git Not specified
CNA Linux Linux affected c29345fa5f66bea0790cf2219f57b974d4fc177b 38d8410021b55d226847b2ac8d189d89fe5a8866 git Not specified
CNA Linux Linux affected c29345fa5f66bea0790cf2219f57b974d4fc177b ec1fcddb3117d9452210e838fd37389ee61e10e8 git Not specified
CNA Linux Linux affected 6.18 Not specified
CNA Linux Linux unaffected 6.18 semver Not specified
CNA Linux Linux unaffected 6.18.30 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.7 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/ec1fcddb3117d9452210e838fd37389ee61e10e8 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/cb27e43c0511e9e1ca8818d231656070b11c18cf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/38d8410021b55d226847b2ac8d189d89fe5a8866 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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