icmp_forward_error() leading to information disclosure · Libslirp: libslirp: out-of-bounds heap read
Affects MicrosoftSource GCVE Database
Not known to be exploited · CVSS 7.4 High.
Data as of 5 Nov 2026, 09:07 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 7.4 |
|---|
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 3 Nov 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 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10libslirp | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8container-tools:rhel8/libslirp | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9libslirp | Affected– | Fixed in– |
| Red Hat OpenShift Container Platform 4libslirp | Affected– | Fixed in– |
| Red Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-8 | Affected– | Fixed in– |
| Red Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-9 | Affected– | Fixed in– |
Description
CVE-2026-120830 is an out-of-bounds heap read vulnerability in the libslirp component's icmp_forward_error() function. This flaw can lead to information disclosure. The affected product is Microsoft software version 3.0. No CVSS score or patch information is provided.