CVE-2026-73584: sblim-sfcb · CWE-377
Source GCVE Database
Not known to be exploited · CVSS 6.3 Medium.
Data as of 13 Nov 2026, 23:54 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 6.3 |
|---|
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 13 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10sblim-sfcb | Affected– | Fixed in– |
| Red Hat Enterprise Linux 6sblim-sfcb | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7sblim-sfcb | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8sblim-sfcb | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9sblim-sfcb | Affected– | Fixed in– |
AI-suggested
Red Hat advises mitigating this vulnerability by disabling the vulnerable instance migration path if it is not required. This can be done by running 'sfcbrepos' with the '-i' option (e.g., 'sudo sfcbrepos -f -i'). Alternatively, avoid running 'sfcbrepos' with elevated privileges on systems where untrusted local users can write to the /tmp directory. A service restart or reload may be necessary if 'sfcbrepos' is managed by a service.
Description
CVE-2026-73584 is a moderate severity vulnerability in sblim-sfcb that allows a local low-privileged attacker to exploit a race condition during privileged instance migration by manipulating a temporary file in /tmp. This race condition involves repeatedly recreating a symbolic link to redirect privileged output to an arbitrary file, potentially causing privileged file corruption or denial of service. Exploitation requires winning a race during privileged sfcbrepos instance migration, which must be enabled and have specific repository content. The attack complexity is high and specific preconditions limit broader impact. Mitigation includes disabling instance migration with the -i option or avoiding running sfcbrepos with elevated privileges where untrusted local users can write to /tmp.