Use of Uninitialized Resource Affecting perf-debuginfo package, versions <1:6.1.159-181.297.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.09% (25th percentile)

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  • Snyk IDSNYK-AMZN2023-PERFDEBUGINFO-14904365
  • published9 Jan 2026
  • disclosed6 Dec 2025

Introduced: 6 Dec 2025

CVE-2025-40279  (opens in a new tab)
CWE-908  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 perf-debuginfo to version 1:6.1.159-181.297.amzn2023 or higher.
This issue was patched in ALAS2023-2025-1350.

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:

net: sched: act_connmark: initialize struct tc_ife to fix kernel leak

In tcf_connmark_dump(), the variable 'opt' was partially initialized using a designatied initializer. While the padding bytes are reamined uninitialized. nla_put() copies the entire structure into a netlink message, these uninitialized bytes leaked to userspace.

Initialize the structure with memset before assigning its fields to ensure all members and padding are cleared prior to beign copied.

CVSS Base Scores

version 3.1