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sblim-sfcb CVE-2026-73584

| EUVDEUVD-2026-57829 MEDIUM
Insecure Temporary File (CWE-377)
2026-08-13 redhat GHSA-58x3-7493-rjr4
Denial Of Service Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 Red Hat Enterprise Linux 9
6.3
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
6.3 MEDIUM
AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
vuln.today AI
6.3 MEDIUM

Local-only vector with low-privilege requirement; AC:H reflects race condition timing; no confidentiality impact as the attack redirects writes rather than exfiltrating data.

3.1 AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
4.0 AV:L/AC:H/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
MEDIUM
qualitative
Red Hat
6.3 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Aug 13, 2026 - 13:21 vuln.today
CVE Published
Aug 13, 2026 - 12:44 cve.org
MEDIUM 6.3

DescriptionCVE.org

A flaw was found in sblim-sfcb. A local, low-privileged attacker can exploit a race condition during privileged instance migration by manipulating a temporary file in the /tmp directory. By repeatedly recreating a symbolic link, the attacker can redirect privileged output to an arbitrary file. This can lead to privileged file corruption or a denial of service (DoS) on the system.

AnalysisAI

Privileged file corruption and denial of service in sblim-sfcb (Small Footprint CIM Broker) on Red Hat Enterprise Linux 6 through 10 is achievable by a local low-privileged attacker exploiting a symlink-based race condition during privileged instance migration. The SFCB daemon writes to a temporary file in /tmp without atomic safety guarantees, allowing an attacker who repeatedly races a symbolic link into place to redirect that privileged write to an arbitrary file path. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Gain low-privileged local shell
Delivery
Identify /tmp path used during sfcbd migration
Exploit
Launch automated symlink-race loop
Execution
Win TOCTOU window during privileged migration write
Persist
Privileged output redirected to attacker-chosen file
Impact
Corrupt system file or trigger DoS
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Vulnerability AssessmentAI

Exploitation The attacker must hold a local OS account with at least low-level shell privileges on the target system (PR:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H accurately characterizes the threat: exploitation requires local shell access with at minimum low OS privileges, and AC:H reflects the genuine timing difficulty of winning a race condition window, which requires automation and repeated attempts. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario A local attacker with a standard low-privileged shell account on an RHEL system running sblim-sfcb launches a tight loop that continuously creates and replaces a symlink at the predictable /tmp path used during privileged instance migration. When the sfcbd daemon initiates a migration - either on a natural schedule or triggered by the attacker through a legitimate CIM operation - the daemon's privileged file write is redirected by the winning symlink to an attacker-chosen path such as /etc/cron.d/, /etc/sudoers.d/, or a critical configuration file, resulting in corruption of that file or a system denial of service. …
Remediation Monitor the Red Hat Security Advisory at https://access.redhat.com/security/cve/CVE-2026-73584 and apply the vendor-released sblim-sfcb package update via `dnf update sblim-sfcb` (RHEL 8/9/10) or `yum update sblim-sfcb` (RHEL 6/7) once a fixed version is published. … Detailed patch versions, workarounds, and compensating controls in full report.
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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise High Performance Computing 15 SP7 Affected
SUSE Linux Enterprise Module for Server Applications 15 SP7 Affected
SUSE Linux Enterprise Server 15 SP7 Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 Affected
SUSE Linux Enterprise High Performance Computing 12 SP5 Affected

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CVE-2026-73584 vulnerability details – vuln.today
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