Bug 2401485 (CVE-2023-53535)

Summary: CVE-2023-53535 kernel: net: bcmgenet: Add a check for oversized packets
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A missing bounds check flaw was found in the Linux kernel's Broadcom GENET Ethernet driver in the packet receive path. A local user on systems with this hardware can trigger this issue when the network interface receives oversized packets from the network that exceed the nominal 2KiB buffer allocation. This causes the driver to invoke skb_over_panic, resulting in a kernel panic and denial of service.
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Description OSIDB Bzimport 2025-10-04 16:03:15 UTC 
In the Linux kernel, the following vulnerability has been resolved:

net: bcmgenet: Add a check for oversized packets

Occasionnaly we may get oversized packets from the hardware which
exceed the nomimal 2KiB buffer size we allocate SKBs with. Add an early
check which drops the packet to avoid invoking skb_over_panic() and move
on to processing the next packet.
Comment 1 Alexander B 2025-10-06 16:06:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100442-CVE-2023-53535-c515@gregkh/T