Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size bcm_sf2_cfp_rule_get_all() walks the whole cfp.unique bitmap into rule_locs[] without consulting nfc->rule_cnt, which is how many entries the caller had room for. ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the ioctl sizes the buffer from the rule_cnt userspace passes in, so once an admin has installed CFP rules any user can ask for fewer slots than there are rules and run off the end of the allocation. A rule_cnt of 0 leaves the buffer pointer NULL and the walk dereferences it.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/8e41ce02589c92356bfd8ef62f6ceff840546e1a
- https://git.kernel.org/stable/c/b231b6d8516d3fe0d4bba549908e08d26a4531a5
- https://git.kernel.org/stable/c/ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e
- https://git.kernel.org/stable/c/cdb719f4b8596d9ccee2d56d204c2c4dce982f46
- https://git.kernel.org/stable/c/f1a2869b3629c0e8394b77b38cb9f19a018c653c
- https://git.kernel.org/stable/c/f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4
- https://git.kernel.org/stable/c/f5e93162b3dd195bfda815e8f7a39aaf1d45437b
- https://git.kernel.org/stable/c/fd1a78c16b1f6978c09cf048e15f349732e4c707
FAQ
What is CVE-2026-98030?
CVE-2026-98030 is a vulnerability with a CVSS score of 7.0 (HIGH). In the Linux kernel, the following vulnerability has been resolved: net: dsa: bcm_sf2: bound the CFP rule dump by the caller's buffer size bcm_sf2_cfp_rule_get_all() walks the whole cfp.unique bitma...
How severe is CVE-2026-98030?
CVE-2026-98030 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-98030?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.