CVE-2026-80788

CVE CVE-2026-80788EUVD EUVD-2026-71431Published 2026-09-04T15:12:59.000ZLast changed 2026-09-07T14:21:13.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: Do not WARN on remotely-controlled oversized SGL allocations When fuzzing the nvme target code, I tripped a kernel warning in nvmet_tcp_map_data() because the length passed into the allocator is controlled by the remote initiator. A remote initiator that sends a command with an SGL claiming a huge number, can create a scatterlist and iovec allocation of over 1 million entries, which causes the backing kmalloc call to exceed MAX_PAGE_ORDER and then the page allocator will trip on a WARN_ON_ONCE_GFP() message: WARNING: mm/page_alloc.c:5280 __alloc_frozen_pages_noprof Workqueue: nvmet_tcp_wq nvmet_tcp_io_work ... sgl_alloc_order nvmet_tcp_map_data nvmet_tcp_try_recv_pdu As it's never good to trip a kernel warning remotely due to many systems having panic-on-warn enabled, let's silence it by just add GFP_NOWARN to the allocation flags.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 6.18.47; 872d26a391da92ed8f0c0f5cb5fef428067b7f30 <737a3b535247226f6e1a7988fd9d6e63e7d6fc71; 872d26a391da92ed8f0c0f5cb5fef428067b7f30 <c509f20be1cabda3087810bb2d658d66b3f31f35; 872d26a391da92ed8f0c0f5cb5fef428067b7f30 <7b6a54d4e7b0da423c2b53ed293fd36b16c0b19e; 5.0; 872d26a391da92ed8f0c0f5cb5fef428067b7f30 <9c95f7e66c62ee6c6abedcf1c04311f430ff5833; 872d26a391da92ed8f0c0f5cb5fef428067b7f30 <86cc450022473c4a29b43a09f3ec22a9ef566dac; patch: 6.1.185; patch: 7.1.11; 872d26a391da92ed8f0c0f5cb5fef428067b7f30 <9b770e40bc00381e5ebf53653de5776773415be3; patch: 0; 872d26a391da92ed8f0c0f5cb5fef428067b7f30 <8d01f0d0e96485e39ad89b859ef85e1dc3020465; 872d26a391da92ed8f0c0f5cb5fef428067b7f30 <7fd6da0f28932442b51658bac4ff55565ca9b377; 872d26a391da92ed8f0c0f5cb5fef428067b7f30 <e7077e6c45423dd2bb7de7b5fc4b018a8e6c4741; patch: 6.6.154; patch: 7.2.1; patch: 5.10.267; patch: 5.15.218; patch: 6.12.106; patch: 7.3-rc1

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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