CVE-2026-98030 Linux Kernel - Buffer Overflow

Linux kernel net: dsa: bcm_sf2 contains a buffer overflow caused by bcm_sf2_cfp_rule_get_all() not bounding CFP rule dump by caller's buffer size, letting unprivileged users cause out-of-bounds memory access, exploit requires installed CFP 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, Information Disclosure
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 with the fix applied.

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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