Bug 2426027 (CVE-2023-54240) - CVE-2023-54240 kernel: net: ethernet: mtk_eth_soc: fix possible NULL pointer dereference in mtk_hwlro_get_fdir_all()
Summary: CVE-2023-54240 kernel: net: ethernet: mtk_eth_soc: fix possible NULL pointer ...
Keywords:
Status: NEW
Alias: CVE-2023-54240
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-30 13:03 UTC by OSIDB Bzimport
Modified: 2025-12-31 14:43 UTC (History)
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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
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