CVE-2022-48672: of: fdt: fix off-by-one error in unflatten_dt_nodes()

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-03 · updated 2026-06-17
Weakness: CWE-193

Description

In the Linux kernel, the following vulnerability has been resolved: of: fdt: fix off-by-one error in unflatten_dt_nodes() Commit 78c44d910d3e ("drivers/of: Fix depth when unflattening devicetree") forgot to fix up the depth check in the loop body in unflatten_dt_nodes() which makes it possible to overflow the nps[] buffer... Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool.

Affected products

Linux kernel: from 4.7 before 4.14.295; from 4.15 before 4.19.260; from 4.20 before 5.4.215; from 5.5 before 5.10.145; from 5.11 before 5.15.70; from 5.16 before 5.19.11 — fixed in 4.14.295, 4.19.260, 5.10.145, 5.15.70, 5.19.11, 5.4.215

How to fix

Upgrade to a fixed version: Linux kernel 4.14.295, 4.19.260, 5.10.145, 5.15.70. Check the vendor advisory for mitigations.

References

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