---
id: CVE-2026-73583
title: >-
  Sblim-sfcb: unsafe deserialization in sblim-sfcb provider-manager ipc allows
  out-of-bounds memory access via malformed operationhdr
summary: >-
  A flaw was found in sblim-sfcb. 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 me…
severity: medium
cvss: 6.6
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H'
cvssSource: cna
cwe:
  - CWE-125
vendor: Red Hat
product: sblim-sfcb
affected:
  - sblim-sfcb (all versions)
  - sblim-sfcb
  - sblim-sfcb (all versions)
  - sblim-sfcb (all versions)
  - sblim-sfcb (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-13T15:10:09.591498Z'
published: '2026-08-13'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T22:56:03.498Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-73583'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-73583'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2462126'
    label: RHBZ#2462126
tags:
  - cve.org
epss: 0.00131
epssPercentile: 0.02739
ingestedAt: '2026-11-05T23:41:31.936Z'
---

## Overview

A flaw was found in sblim-sfcb. 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.

## Affected

- `sblim-sfcb (all versions)`
- `sblim-sfcb`
- `sblim-sfcb (all versions)`
- `sblim-sfcb (all versions)`
- `sblim-sfcb (all versions)`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

To mitigate this issue, restrict access to the local connect socket used by `sblim-sfcb` to prevent untrusted local users from obtaining the internal provider-manager descriptor. Deployments where only trusted users can reach this socket will have materially reduced exposure. Consult your system's documentation for appropriate methods to secure local IPC channels and socket permissions for the `sblim-sfcb` service. A restart of the `sfcbd` service may be required for changes to take effect, which could temporarily disrupt services relying on `sblim-sfcb`.