Bug 2500850 - CVE-2026-15811 kronosnet: kronosnet: encryption key exposure in memory after cryptographic configuration changes [fedora-all]
Summary: CVE-2026-15811 kronosnet: kronosnet: encryption key exposure in memory after ...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: kronosnet
Version: rawhide
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: ---
Assignee: Fabio Massimo Di Nitto
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["a91db4f8-a241-4186-944c-4...
Depends On:
Blocks: CVE-2026-15811
TreeView+ depends on / blocked
 
Reported: 2026-07-15 10:36 UTC by Ganesh
Modified: 2026-07-20 14:01 UTC (History)
3 users (show)

Fixed In Version: kronosnet-1.35-1.fc45
Clone Of:
Environment:
Last Closed: 2026-07-20 14:01:52 UTC
Type: ---
Embargoed:


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Description Ganesh 2026-07-15 10:36:33 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Vulnerability Reference: A flaw was found in kronosnet where it fails to properly sanitize sensitive memory locations following cryptographic configuration adjustments, potentially exposing encryption keys to local attackers.

Component / Vulnerable Part: kronosnet -> Core cryptographic configuration and memory management subsystems (https://github.com/kronosnet/kronosnet/).

Technical Analysis & Root Cause: When cryptographic configuration changes are performed within kronosnet, the internal memory structures holding active encryption keys are freed or reallocated. However, the runtime implementation lacks an explicit memory-wiping routine (such as memset_s or equivalent secure clearing operations) before releasing these blocks back to the system heap. As a result, the raw cryptographic key material remains resident in unallocated memory space. A local attacker with the capability to exploit secondary memory disclosure vulnerabilities or inspect uninitialized heap segments can recover the active encryption key.

Impact: With the recovered cryptographic key, a local attacker can decrypt network communications handled by the kronosnet framework or inject unauthorized packets into the cluster traffic, leading to data exposure and cluster or system instability.

Comment 2 Fedora Update System 2026-07-20 13:57:48 UTC
FEDORA-2026-3e85d87212 (kronosnet-1.35-1.fc45) has been submitted as an update to Fedora 45.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-3e85d87212

Comment 3 Fedora Update System 2026-07-20 14:01:52 UTC
FEDORA-2026-3e85d87212 (kronosnet-1.35-1.fc45) has been pushed to the Fedora 45 stable repository.
If problem still persists, please make note of it in this bug report.


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