Answer in brief
CVE-2026-90046 records a High severity (CVSS 7.8) vulnerability in mm/page_alloc: don't spin_trylock() in NMI on UP. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8c57b687e8331eb80e302a2c528b18b966a9ac7a <06c76d3c389ff504052f64b1acee44651bd847fa || >=8c57b687e8331eb80e302a2c528b18b966a9ac7a <68a069b407303e71db371df85036101e8ff59280 || >=8c57b687e8331eb80e302a2c528b18b966a9ac7a <3105ae628fb785d48b49256468be4f21a7b3cfc0 | 06c76d3c389ff504052f64b1acee44651bd847fa, 68a069b407303e71db371df85036101e8ff59280, 3105ae628fb785d48b49256468be4f21a7b3cfc0 |
| Linux/Linuxgeneric | 6.15 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
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/[email protected]/ 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.
Quoted source text, attributed separately from HOL analysis.