CVE-2026-90046

CVE CVE-2026-90046EUVD EUVD-2026-80654Published 2026-09-16T10:33:43.000ZLast changed 2026-09-16T14:42:01.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: mm/page_alloc: don't spin_trylock() in NMI on UP Patch series "mm/page_alloc: fixes for free_pages_nolock() on RT/UP". Pre-existing bugs found by Sashiko during review of this other series: https://lore.kernel.org/all/20260703-alloc-trylock-v5-0-c87b714e19d3@google.com/ I have not reproduced these bugs, and I suspect there is no real-world user that is affected by them. This patch (of 2): As noted in can_spin_trylock(), using this is unsafe in this context. commit 620b46ed6ae17 ("mm/page_alloc: return NULL early from alloc_frozen_pages_nolock() in NMI on UP") fixed this on the alloc side but missed the free side. Impact: If BPF programs using these features in NMI (probably tracing) are present on non-SMP builds this might crash the kernel and is probably exploitable by local attackers for privilege escalation.

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 6.15; patch: 7.2.5; 8c57b687e8331eb80e302a2c528b18b966a9ac7a <68a069b407303e71db371df85036101e8ff59280; patch: 7.3-rc1; patch: 6.18.51; 8c57b687e8331eb80e302a2c528b18b966a9ac7a <06c76d3c389ff504052f64b1acee44651bd847fa; 8c57b687e8331eb80e302a2c528b18b966a9ac7a <3105ae628fb785d48b49256468be4f21a7b3cfc0; patch: 0

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.