Use of Uninitialized Variable Affecting python3-perf6.12-debuginfo package, versions <1:6.12.114-139.210.amzn2023


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.73% (55th percentile)

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  • Snyk IDSNYK-AMZN2023-PYTHON3PERF612DEBUGINFO-22393297
  • published10 Nov 2026
  • disclosed17 Sept 2026

Introduced: 17 Sep 2026

CVE-2026-90104  (opens in a new tab)
CWE-457  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 python3-perf6.12-debuginfo to version 1:6.12.114-139.210.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3402.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python3-perf6.12-debuginfo package and not the python3-perf6.12-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:

NFSv4.1: zero referring call lists before decoding

decode_cb_sequence_args() allocates csa_rclists with kmalloc_objs(), so each referring_call_list starts uninitialized. decode_rc_list() assigns rcl_refcalls only when rcl_nrefcalls is nonzero. A valid list with zero referring calls therefore leaves the pointer uninitialized, and nfs4_callback_sequence() later passes stale slab contents to kfree().

Allocate csa_rclists with kzalloc_objs() so every rcl_refcalls member is NULL from the beginning, including valid empty referring call lists.

CVSS Base Scores

version 3.1