In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
cxl\/ras: Fix cxl_rch_get_aer_info() out-of-bounds AER register read<\/p>\n
cxl_rch_get_aer_info() copies the RCH Downstream Port AER capability from
\nthe RCRB MMIO block using a readl() loop bounded by sizeof(struct
\naer_capability_regs). This struct is a software layout and its embedded
\nstruct pcie_tlp_log is larger than the on-wire AER capability. As a
\nresult the loop reads past the mapped AER register block.<\/p>\n
The over-read also populates the software-only tail fields including
\nheader_log.header_len. An out-of-range header_len passed to
\npcie_print_tlp_log() can then loop past the header log buffer and cause
\na second out-of-bounds read.<\/p>\n
The read was correct when introduced, but struct pcie_tlp_log has since
\ngrown (Header Log and TLP Prefix Log sizes, header_len and flit fields),
\nso sizeof(struct aer_capability_regs) no longer matches the physical AER
\ncapability.<\/p>\n
Bound the read to the physical AER registers, header through the 16 byte
\nHeader Log. Zero the destination first so the software-only fields are
\ndeterministic.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
cxl\/ras: Fix cxl_rch_get_aer_info() out-of-bounds AER register read<\/p>\n
cxl_rch_get_aer_info() copies the RCH Downstream Port AER capa<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-21653","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/21653","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=21653"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21653"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21653"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}