Detections
Analytics
CVE-2026-98030
high
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.
References
https://git.kernel.org/stable/c/fd1a78c16b1f6978c09cf048e15f349732e4c707
https://git.kernel.org/stable/c/f5e93162b3dd195bfda815e8f7a39aaf1d45437b
https://git.kernel.org/stable/c/f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4
https://git.kernel.org/stable/c/f1a2869b3629c0e8394b77b38cb9f19a018c653c
https://git.kernel.org/stable/c/cdb719f4b8596d9ccee2d56d204c2c4dce982f46
https://git.kernel.org/stable/c/ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e
https://git.kernel.org/stable/c/b231b6d8516d3fe0d4bba549908e08d26a4531a5
https://git.kernel.org/stable/c/8e41ce02589c92356bfd8ef62f6ceff840546e1a