---
id: CVE-2026-73584
title: >-
  Sblim-sfcb: sblim-sfcb: privileged file corruption and denial of service via
  insecure temporary file handling
summary: >-
  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 at…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-377
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: '2026-08-13T12:59:08.270240Z'
published: '2026-08-13'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T22:56:05.702Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-73584'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-73584'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2462721'
    label: RHBZ#2462721
tags:
  - cve.org
epss: 0.00126
epssPercentile: 0.02344
ingestedAt: '2026-11-05T23:41:31.934Z'
---

## Overview

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.

## 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, if instance migration is not required, run the `sfcbrepos` command with the `-i` option to disable the vulnerable migration path. For example: `sudo sfcbrepos -f -i`. Alternatively, avoid running `sfcbrepos` with elevated privileges on systems where untrusted local users can concurrently write to the `/tmp` directory. A service restart or reload may be required for changes to take effect if `sfcbrepos` is managed by a service.