Improper Validation of Specified Quantity in Input Affecting perf-debuginfo package, versions <1:6.1.166-197.305.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.12% (3rd percentile)

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  • Snyk IDSNYK-AMZN2023-PERFDEBUGINFO-17409675
  • published23 Jun 2026
  • disclosed27 May 2026

Introduced: 27 May 2026

CVE-2026-45890  (opens in a new tab)
CWE-1284  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 perf-debuginfo to version 1:6.1.166-197.305.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1544.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf-debuginfo package and not the perf-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

xen-netback: reject zero-queue configuration from guest

A malicious or buggy Xen guest can write "0" to the xenbus key "multi-queue-num-queues". The connect() function in the backend only validates the upper bound (requested_num_queues > xenvif_max_queues) but not zero, allowing requested_num_queues=0 to reach vzalloc(array_size(0, sizeof(struct xenvif_queue))), which triggers WARN_ON_ONCE(!size) in __vmalloc_node_range().

On systems with panic_on_warn=1, this allows a guest-to-host denial of service.

The Xen network interface specification requires the queue count to be "greater than zero".

Add a zero check to match the validation already present in xen-blkback, which has included this guard since its multi-queue support was added.

CVSS Base Scores

version 3.1