CVE-2026-72129

Status: UPDATED  |  Advisory ID: CVE-2026-72129

Key Details

Affected Products, Subsystems & Sectors

What to Know

In the Linux kernel, the following vulnerability has been resolved:

nvmet-rdma: handle inline data with a nonzero offset

nvmet_rdma_use_inline_sg() maps the host-controlled inline data offset

into the per-command inline scatterlist. The bounds check admits any

offset with off + len <= inline_data_size, but the mapping still assumes

the data begins in the first inline page:

sg->offset = off;

sg->length = min_t(int, len, PAGE_SIZE - off);

When a port is configured with inline_data_size > PAGE_SIZE (settable up

to max(SZ_16K, PAGE_SIZE)), an offset in (PAGE_SIZE, inline_data_size]

makes "PAGE_SIZE - off" underflow, so sg->length is set to ~4 GiB and

the block backend reads far past the first inline page. num_pages(len)

also ignores the offset, so an in-bounds offset whose [off, off+len)

span crosses a page boundary under-counts the scatterlist.

Map the offset properly: split it into a page index and an in-page

offset, start the scatterlist at that page, and size the page count from

page_off + len. Because the request scatterlist may now start at

inline_sg[page_idx] rather than inline_sg[0], generalize the inline-SGL

identity test in nvmet_rdma_release_rsp() to a range test; otherwise the

persistent inline scatterlist is mistaken for an allocated one and

nvmet_req_free_sgls() frees an inline page (and warns in

free_large_kmalloc()). (NVD)

What to Do

Monitor Linux's web page for any future patch releases.

References