CVE-2026-98030

CVE CVE-2026-98030EUVD EUVD-2026-86683Published 2026-09-25T10:23:46.000ZLast changed 2026-09-25T14:41:54.000ZCVSS 7.0

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 7.2.7; patch: 7.3-rc3; 7318166cacad158b46240f66250d7cc5a481653b <fd1a78c16b1f6978c09cf048e15f349732e4c707; 7318166cacad158b46240f66250d7cc5a481653b <f1a2869b3629c0e8394b77b38cb9f19a018c653c; patch: 0; patch: 6.12.111; 7318166cacad158b46240f66250d7cc5a481653b <cdb719f4b8596d9ccee2d56d204c2c4dce982f46; 7318166cacad158b46240f66250d7cc5a481653b <b231b6d8516d3fe0d4bba549908e08d26a4531a5; 4.11; patch: 6.18.53

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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