CVE-2026-72212

CVE CVE-2026-72212EUVD EUVD-2026-58970Published 2026-08-15T05:54:07.000ZLast changed 2026-08-17T05:10:26.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: mm/memory_hotplug: fix incorrect altmap passing in error path In create_altmaps_and_memory_blocks(), when arch_add_memory() succeeds with memmap_on_memory enabled, the vmemmap pages are allocated from params.altmap. If create_memory_block_devices() subsequently fails, the error path calls arch_remove_memory() with a NULL altmap instead of params.altmap. This is a bug that could lead to memory corruption. Since altmap is NULL, vmemmap_free() falls back to freeing the vmemmap pages into the system buddy allocator via free_pages() instead of the altmap. arch_remove_memory() then immediately destroys the physical linear mapping for this memory. This injects unowned pages into the buddy allocator, causing machine checks or memory corruption if the system later attempts to allocate and use those freed pages. Fix this by passing params.altmap to arch_remove_memory() in the error path.

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 6b8f0798b85aa529011570369db985a788f3003f <722e6c54bde6391fb95f0357f555aca887c7b18c; 6b8f0798b85aa529011570369db985a788f3003f <2f9e3ec17c3d2093c664c00a027588a446c39894; 6.8; 6b8f0798b85aa529011570369db985a788f3003f <3833e6abdbbfb59ec8203a84a84206cb7ffb41ac; patch: 0; patch: 7.2; patch: 7.1.5; 6b8f0798b85aa529011570369db985a788f3003f <2fac4afa0e2e68841334c78c1821e49f74fbc66a; patch: 6.18.40; patch: 6.12.97

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

Does this concern one of your customers?

This page cannot answer that — it does not know your estate. Whoever has recorded their environments gets the answer the morning after publication, together with a paragraph they can forward to the customer unedited.

Try it for 28 days

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.