CVE-2025-38342 (GCVE-0-2025-38342)
Vulnerability from cvelistv5
Published
2025-07-10 08:15
Modified
2026-08-05 12:01
Severity ?
7.0 (High) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: software node: Correct a OOB check in software_node_get_reference_args() software_node_get_reference_args() wants to get @index-th element, so the property value requires at least '(index + 1) * sizeof(*ref)' bytes but that can not be guaranteed by current OOB check, and may cause OOB for malformed property. Fix by using as OOB check '((index + 1) * sizeof(*ref) > prop->length)'.
References
Impacted products
Vendor Product Version
Linux Linux Version: 59abd83672f70cac4b6bf9b237506c5bc6837606
Version: 59abd83672f70cac4b6bf9b237506c5bc6837606
Version: 59abd83672f70cac4b6bf9b237506c5bc6837606
Version: 59abd83672f70cac4b6bf9b237506c5bc6837606
Version: 59abd83672f70cac4b6bf9b237506c5bc6837606
Version: 59abd83672f70cac4b6bf9b237506c5bc6837606
Version: 59abd83672f70cac4b6bf9b237506c5bc6837606
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              "value": "AV:L - The affected code is driver-core firmware-node plumbing reached only during in-kernel device/driver probe and property lookups on the local machine (gpiolib-swnode, iio/inkern, sfp-bus, reset, mailbox, v4l2-fwnode); no packet, socket or remote peer data ever reaches `software_node_get_reference_args()`.\nAC:H - The faulty bound only differs from the correct one when `prop-\u003elength` is not an exact multiple of `sizeof(struct software_node_ref_args)`, and every in-tree `DEV_PROP_REF` property is built by `PROPERTY_ENTRY_REF[_ARRAY[_LEN]]()`, which always sets an exact multiple; the required malformed property table is a condition the attacker cannot create or influence.\nPR:L - If a mis-sized reference property existed, the lookup is driven from ordinary probe/consumer paths that an unprivileged local user can provoke (device binding, opening a consumer device node) without any capability; scored as low privilege rather than high since no root-only interface gates it.\nUI:N - The out-of-bounds element read happens automatically inside the property lookup during device probe or consumer resource acquisition, with no action required from another user.\nS:U - The overread, wild pointer dereference and any resulting crash are confined to the kernel\u0027s own security authority on the same host; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to 87 bytes of adjacent slab memory beyond the reference array are read and interpreted as a `software_node_ref_args`, and the eight `u64 args[]` values from that out-of-bounds memory are propagated to consumers (GPIO/IIO/reset specifiers) where they can surface, making this more than a strictly bounded few-byte read.\nI:H - The out-of-bounds bytes are type-confused into a live `struct fwnode_handle *` that is dereferenced and invoked through its ops vtable (`fwnode_property_read_u32()`, `fwnode_handle_get()` \u2192 `kobject_get()`), giving an indirect call through non-object memory and a refcount increment at an out-of-bounds address \u2014 a control-flow-relevant corruption primitive.\nA:H - Reading past the allocation yields a garbage `fwnode` pointer that is immediately dereferenced and called through, producing a kernel oops/panic (and a KASAN slab-out-of-bounds report on instrumented kernels)."
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