CVE-2026-97617

CVE CVE-2026-97617EUVD EUVD-2026-86748Published 2026-09-25T10:22:24.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Check resize_disabled before publishing the new subbuf order ring_buffer_subbuf_order_set() stores the new order and only then walks the CPUs, returning -EBUSY if any of them has resizing disabled. A user mapped buffer has resizing disabled, and __rb_map_vma() reads buffer->subbuf_order without buffer->mutex, so an mmap of an already mapped CPU racing the failing order change sizes the mapping with the new order and inserts pages past the sub-buffer into the VMA. Check the CPUs before storing the new order.

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 117c39200d9d760cbd5944bb89efb7b9c51965aa <9fd4ea952e6ac12a63c3fe89f08ad02771aa2c06; patch: 0; patch: 7.3-rc3; 117c39200d9d760cbd5944bb89efb7b9c51965aa <f2099644e1b2a2c0805c5240d63ab0522d9d0174; 117c39200d9d760cbd5944bb89efb7b9c51965aa <d860c67c051685abb0460b593b193f0f45f4fa92; patch: 6.18.53; 6.10; patch: 6.12.111; patch: 7.2.7; 117c39200d9d760cbd5944bb89efb7b9c51965aa <32bf47db9237c5b8b6f6aaa5356bb4c79d241f76

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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