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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
7318166cacad158b46240f66250d7cc5a481653b to < ca49c526291d7cd3a5cb49b0edd7f50a5ae7176eaffected7318166cacad158b46240f66250d7cc5a481653b to < 8e41ce02589c92356bfd8ef62f6ceff840546e1aaffected7318166cacad158b46240f66250d7cc5a481653b to < f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4affected7318166cacad158b46240f66250d7cc5a481653b to < f5e93162b3dd195bfda815e8f7a39aaf1d45437baffected7318166cacad158b46240f66250d7cc5a481653b to < f1a2869b3629c0e8394b77b38cb9f19a018c653caffected7318166cacad158b46240f66250d7cc5a481653b to < fd1a78c16b1f6978c09cf048e15f349732e4c707affected7318166cacad158b46240f66250d7cc5a481653b to < b231b6d8516d3fe0d4bba549908e08d26a4531a5affected7318166cacad158b46240f66250d7cc5a481653b to < cdb719f4b8596d9ccee2d56d204c2c4dce982f46affected
Linux Linux
Default version status: affected
4.11affected0 to < 4.11unaffected5.10.271 to ≤ 5.10.*unaffected5.15.222 to ≤ 5.15.*unaffected6.1.189 to ≤ 6.1.*unaffected6.6.158 to ≤ 6.6.*unaffected6.12.111 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.2.7 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ca49c526291d7cd3a5cb49b0edd7f50a5ae7176e ↗
- https://git.kernel.org/stable/c/8e41ce02589c92356bfd8ef62f6ceff840546e1a ↗
- https://git.kernel.org/stable/c/f2cf4ef2d94fc15fd2e21c131fc1ab3f76125bf4 ↗
- https://git.kernel.org/stable/c/f5e93162b3dd195bfda815e8f7a39aaf1d45437b ↗
- https://git.kernel.org/stable/c/f1a2869b3629c0e8394b77b38cb9f19a018c653c ↗
- https://git.kernel.org/stable/c/fd1a78c16b1f6978c09cf048e15f349732e4c707 ↗
- https://git.kernel.org/stable/c/b231b6d8516d3fe0d4bba549908e08d26a4531a5 ↗
- https://git.kernel.org/stable/c/cdb719f4b8596d9ccee2d56d204c2c4dce982f46 ↗