In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net\/mlx5: Fix MCIA register buffer overflow on 32 dword reads<\/p>\n
The MCIA register can return up to 32 dwords (128 bytes) when the device
\nadvertises the mcia_32dwords capability, but struct
\nmlx5_ifc_mcia_reg_bits only defines dword_0..11, leaving room for just
\n12 dwords (48 bytes) of data.<\/p>\n
mlx5_query_mcia() clamps the read size to mlx5_mcia_max_bytes() and then
\nmemcpy()s that many bytes out of the register, potentially reading past
\nthe end of the ‘out’ buffer. On kernels built with FORTIFY_SOURCE this
\nis caught as a buffer overflow while reading the module EEPROM via
\nethtool:<\/p>\n
detected buffer overflow in memcpy
\n kernel BUG at lib\/string_helpers.c:1048!
\n RIP: 0010:fortify_panic+0x13\/0x20
\n Call Trace:
\n mlx5_query_mcia.isra.0+0x200\/0x210 [mlx5_core]
\n mlx5_query_module_eeprom_by_page+0x4a\/0xa0 [mlx5_core]
\n mlx5e_get_module_eeprom_by_page+0xbb\/0x120 [mlx5_core]
\n eeprom_prepare_data+0xf3\/0x170
\n ethnl_default_doit+0xf1\/0x3b0<\/p>\n
Extend the mcia_reg layout to 32 dwords.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
net\/mlx5: Fix MCIA register buffer overflow on 32 dword reads<\/p>\n
The MCIA register can return up to 32 dwords (128 bytes) when the de<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-5412","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/5412","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5412"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5412"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}