Bug 2400767 (CVE-2023-53495)

Summary: CVE-2023-53495 kernel: net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc()
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 2025-10-01 12:06:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc()

rules 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
rules to avoid OOB writing or NULL pointer dereference.
Comment 1 Jon Moroney 2025-10-01 20:18:56 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100125-CVE-2023-53495-3cce@gregkh/T