CVE-2026-98027 Linux Kernel net: dsa: mv88e6xxx - Buffer Overflow

Linux kernel net: dsa: mv88e6xxx contains a buffer overflow caused by improper handling of rxnfc->rule_cnt in mv88e6xxx_get_rxnfc(), letting unprivileged users cause out-of-bounds memory access, exploit requires installed policy rules by admin.

CVSS base score 7.0 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
25 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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