fpga: microchip-spi: fix zero header_size OOB read in mpf_ops_parse_header()
In the Linux kernel, the following vulnerability has been resolved: fpga: microchip-spi: fix zero header_size OOB read in mpf_ops_parse_header() mpf_ops_parse_header() reads header_size from the bitstream at MPF_HEADER_SIZE_OFFSET (24). When header_size is zero, the expression *(buf + header_size - 1) reads one byte before the buffer start. Since initial_header_size is set to 71 in mpf_ops, the fpga-mgr core guarantees the buffer is large enough to reach MPF_HEADER_SIZE_OFFSET. The only real gap is the zero header_size case, which cannot be resolved by providing a larger buffer, so return -EINVAL.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.1.178, 6.12.97, 6.18.40, 6.6.145, 7.1.5
- CVEs
- CVE-2026-72156
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 18:26 UTC · Revision 1
Source evidence
fpga: microchip-spi: fix zero header_size OOB read in mpf_ops_parse_header()
core-osv · Original sourcePublished 15 Aug 2026, 05:53 UTC
In the Linux kernel, the following vulnerability has been resolved: fpga: microchip-spi: fix zero header_size OOB read in mpf_ops_parse_header() mpf_ops_parse_header() reads header_size from the bitstream at MPF_HEADER_SIZE_OFFSET (24). When header_size is zero, the expression *(buf + header_size - 1) reads one byte before the buffer start. Since initial_header_size is set to 71 in mpf_ops, the fpga-mgr core guarantees the buffer is large enough to reach MPF_HEADER_SIZE_OFFSET. The only real gap is the zero header_size case, which cannot be resolved by providing a larger buffer, so return -EINVAL.
osv:CVE-2026-72156
Kernel
Fixed versions: 6.1.178, 6.6.145, 6.12.97, 6.18.40, 7.1.5
Complete source record
{
"id": "1935e7262547b90533189c9debfa49ef9bbd58cd98d47c5d645bef8d2f08d9f8",
"url": "https://osv.dev/vulnerability/CVE-2026-72156",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "fpga: microchip-spi: fix zero header_size OOB read in mpf_ops_parse_header()",
"summary": "In the Linux kernel, the following vulnerability has been resolved: fpga: microchip-spi: fix zero header_size OOB read in mpf_ops_parse_header() mpf_ops_parse_header() reads header_size from the bitstream at MPF_HEADER_SIZE_OFFSET (24). When header_size is zero, the expression *(buf + header_size - 1) reads one byte before the buffer start. Since initial_header_size is set to 71 in mpf_ops, the fpga-mgr core guarantees the buffer is large enough to reach MPF_HEADER_SIZE_OFFSET. The only real gap is the zero header_size case, which cannot be resolved by providing a larger buffer, so return -EINVAL.",
"evidence": "osv:CVE-2026-72156",
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"modified": "2026-10-28T02:30:22.147042554Z",
"provider": "osv",
"references": [
"https://git.kernel.org/stable/c/0d3766fecd9b2db39a18b48021c15c522997ec25",
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"https://nvd.nist.gov/vuln/detail/CVE-2026-72156",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
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"source_id": "core-osv",
"document_id": 488378,
"published_at": "2026-08-15T05:53:25.979+00:00"
}