CVE-2026-89329: Use of Blocking Code in Single-threaded, Non-blocking Context in Red Hat Red Hat Enterprise Linux 10
A flaw was found in `multipathd`. A local attacker with access to the `multipathd` UNIX control socket can exploit this vulnerability by sending valid commands and then ceasing to read replies. This action can cause the `multipathd` listener thread to block, leading to a Denial of Service (DoS) where legitimate Inter-Process Communication (IPC) operations may hang or time out. This issue does not result in privilege escalation, arbitrary code execution, or impact data confidentiality or integrity.
AI Analysis
Technical Summary
The vulnerability in multipathd arises from the use of blocking code in a single-threaded, non-blocking context. Specifically, a local attacker who can access the multipathd UNIX control socket can send valid commands and then stop reading the replies. This causes the listener thread to block, resulting in a denial of service condition where legitimate IPC operations may hang or time out. There is no impact on privilege escalation, arbitrary code execution, or data confidentiality and integrity.
Potential Impact
The primary impact is a denial of service (DoS) condition affecting inter-process communication operations related to multipathd. Legitimate IPC operations may hang or time out due to the blocking listener thread. There is no impact on privilege escalation, code execution, or data confidentiality and integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-89329 for current remediation guidance.
CVE-2026-89329: Use of Blocking Code in Single-threaded, Non-blocking Context in Red Hat Red Hat Enterprise Linux 10
Description
A flaw was found in `multipathd`. A local attacker with access to the `multipathd` UNIX control socket can exploit this vulnerability by sending valid commands and then ceasing to read replies. This action can cause the `multipathd` listener thread to block, leading to a Denial of Service (DoS) where legitimate Inter-Process Communication (IPC) operations may hang or time out. This issue does not result in privilege escalation, arbitrary code execution, or impact data confidentiality or integrity.
CVSS v3.1
Score 6.2medium
Affected software
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 6
Red Hat
Red Hat Enterprise Linux 7
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat OpenShift Container Platform 4
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in multipathd arises from the use of blocking code in a single-threaded, non-blocking context. Specifically, a local attacker who can access the multipathd UNIX control socket can send valid commands and then stop reading the replies. This causes the listener thread to block, resulting in a denial of service condition where legitimate IPC operations may hang or time out. There is no impact on privilege escalation, arbitrary code execution, or data confidentiality and integrity.
Potential Impact
The primary impact is a denial of service (DoS) condition affecting inter-process communication operations related to multipathd. Legitimate IPC operations may hang or time out due to the blocking listener thread. There is no impact on privilege escalation, code execution, or data confidentiality and integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-89329 for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-09-11T15:06:03.354Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-89329","vendor":"Red Hat"}]
Threat ID: 6aa44ce691cc7f384886b3c6
Added to database: 09/11/2026, 18:48:06 UTC
Last enriched: 09/11/2026, 19:03:18 UTC
Last updated: 09/12/2026, 12:01:23 UTC
Views: 14
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