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CVE-2026-98808: net: systemport: Fix buffer overflow in bcm_sysport_get_stats()

• Severity: unknown
• 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: 2026-10-18 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: net: systemport: Fix buffer overflow in bcm_sysport_get_stats() When running on SYSTEMPORT Lite, certain statistics are unsupported and skipped during bcm_sysport_get_stats(). The variable 'j' tracks the compacted index into the destination data buffer, whereas 'i' iterates over all elements in bcm_sysport_gstrings_stats. Because the buffer allocated by ethtool is sized only according to bcm_sysport_get_sset_count(), storing values at data[i] instead of data[j] writes past the allocated array bounds, leading to memory corruption. Fix this by writing to data[j] instead of data[i].

Affected products

• Linux kernel: 4.14 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/29d1d35ad5ad379a904263ea1cd4ba1d71cd965f
• https://git.kernel.org/stable/c/96a2b042051553df0d9f03b518dd3b7105b36935
• https://git.kernel.org/stable/c/96d8b26be5bc451188acdcee055948da45adbde0
• https://git.kernel.org/stable/c/eb7b84af0ec5c71b4920e999611b466b3784496c
• https://git.kernel.org/stable/c/faba9fdde480356f4a1d3b1a5713b7b354858a1c

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