Bug 2426027 (CVE-2023-54240)

Summary: CVE-2023-54240 kernel: net: ethernet: mtk_eth_soc: fix possible NULL pointer dereference in mtk_hwlro_get_fdir_all()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-30 13:03:14 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: mtk_eth_soc: fix possible NULL pointer dereference in mtk_hwlro_get_fdir_all()

rule_locs is allocated in ethtool_get_rxnfc and the size is determined by
rule_cnt from user space. So rule_cnt needs to be check before using
rule_locs to avoid NULL pointer dereference.
Comment 1 Alexander B 2025-12-31 14:39:38 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025123033-CVE-2023-54240-b9f8@gregkh/T