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CVE-2026-73583 Red Hat CVE debrief

A local attacker with access to the system can exploit an unsafe deserialization vulnerability in the provider-manager's inter-process communication (IPC) message parsing. By sending a specially crafted message, the attacker can cause out-of-bounds memory access, leading to the termination of the provider-manager process and a denial of service. This could also potentially result in limited unintended information disclosure.

Vendor
Red Hat
Product
Red Hat Enterprise Linux 10
CVSS
MEDIUM 6.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-13
Original CVE updated
2026-08-25
Advisory published
2026-08-13
Advisory updated
2026-08-25

Who should care

System administrators and security teams responsible for managing Red Hat Enterprise Linux systems should be aware of this vulnerability and take necessary actions to update and protect their systems.

Technical summary

The CVE-2026-73583 vulnerability is caused by an unsafe deserialization in the provider-manager's IPC message parsing in sblim-sfcb. A local attacker can exploit this vulnerability by sending a specially crafted message, leading to a denial of service and potential information disclosure. The affected products include Red Hat Enterprise Linux 6, 7, 8, 9, and 10. The CVSS score for this vulnerability is 6.6, with a severity of Medium.

Defensive priority

Medium-priority defensive actions are required to address the vulnerability in sblim-sfcb. The vulnerability allows a local attacker to cause a denial of service and potentially limited information disclosure. Affected systems should be updated with a patched version of sblim-sfcb as soon as possible.

Recommended defensive actions

  • Update sblim-sfcb to the latest patched version
  • Restrict access to the system to authorized users only
  • Monitor system logs for suspicious activity
  • Implement compensating controls to detect and prevent similar attacks
  • Verify system configurations and inventory for affected systems

Evidence notes

The CVE-2026-73583 vulnerability was found in sblim-sfcb, which is used in Red Hat Enterprise Linux. The vulnerability is caused by an unsafe deserialization in the provider-manager's IPC message parsing. A local attacker can exploit this vulnerability by sending a specially crafted message, leading to a denial of service and potential information disclosure. The affected products include Red Hat Enterprise Linux 6, 7, 8, 9, and 10.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-73583 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-73583

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-73583 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-73583

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.