CVE-2026-46308
In 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.
Affected versions
Linux kernel versions
6.18
and later are affected. Fixed in
6.18.30,
7.0.7,
7.1-rc3
and their respective stable series.
References
The following references provide additional information about CVE-2026-46308 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/38d8410021b55d226847b2ac8d189d89fe5a8866
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PatchKernel patch commithttps://git.kernel.org/stable/c/cb27e43c0511e9e1ca8818d231656070b11c18cf
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PatchKernel patch commithttps://git.kernel.org/stable/c/ec1fcddb3117d9452210e838fd37389ee61e10e8
Frequently asked questions
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What is CVE-2026-46308?
CVE-2026-46308 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.18 onward and has been patched in 6.18.30, 7.0.7 and 7.1-rc3. CVE-2026-46308 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-46308?
Yes — CVE-2026-46308 has been patched. Fixed versions include 6.18.30, 7.0.7 and 7.1-rc3. If you are running Linux kernel 6.18 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-46308 actively exploited?
No — CVE-2026-46308 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.