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CVE-2026-120831ModerateAdjacentRevised 12 Nov

Libslirp: libslirp: queue pointer corruption in if_output() leading to denial of service

No KEV listing collectedCVSS 6.5Fix not stated
MSRC advisory NVD CVE.org

Assessment

Severity
Moderate
CVSS base score
6.5
Impact
Not stated
Exploitation detected
Unknown: not stated by MSRC
Exploitability
Not assessed
Publicly disclosed
Unknown: not stated by MSRC
EPSS · 30-day forecast
No EPSS score collected
Customer action
Required: follow the MSRC remediation guidance
More details
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U
Public detection template
No Nuclei template is listed in the current collected catalog
Component
Mariner
Weakness
CWE-787: Out-of-bounds Write
Issued by
redhat
Published
5 Nov 2026 · November 2026
Last revised
12 Nov 2026Information published.
CVSS 3.1 base metricsRed raises the risk · green lowers it
Attack vector
AdjacentAV:A
Attack complexity
LowAC:L
Privileges required
NonePR:N
User interaction
NoneUI:N
Scope
UnchangedS:U
Confidentiality
NoneC:N
Integrity
NoneI:N
Availability
HighA:H

Updates that fix it

0 KBs

No KB listed

No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.

Affected products

Open Source Software
1 affected product
  • azl3 libslirp 4.9.6-1 on Azure Linux 3.0

What changed

  1. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  3. Detection template: Unknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  4. Detection template: No Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (18)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 13 Nov 2026 · 12:10:20 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  2. 13 Nov 2026 · 12:10:20 UTC Source coverage: public-exploit-codeIncomplete → Current
  3. 13 Nov 2026 · 12:10:20 UTC Source coverage: first-epssIncomplete → Current
  4. 13 Nov 2026 · 12:10:20 UTC Source coverage: msrc-cvrfIncomplete → Current
  5. 13 Nov 2026 · 11:07:20 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  6. 13 Nov 2026 · 11:07:20 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  7. 13 Nov 2026 · 11:07:20 UTC Source coverage: first-epssCurrent → Incomplete
  8. 13 Nov 2026 · 11:07:20 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  9. 12 Nov 2026 · 09:04:19 UTC Last revised10 Nov 2026 14:44 UTC → 12 Nov 2026 01:44 UTC
  10. 11 Nov 2026 · 08:57:52 UTC Last revised5 Nov 2026 01:04 UTC → 10 Nov 2026 14:44 UTC
  11. 6 Nov 2026 · 17:32:22 UTC Public detection templateUnknown: detection-template evidence is incomplete or retained → No Nuclei template listed
  12. 6 Nov 2026 · 17:32:22 UTC Source coverage: public-exploit-codeIncomplete → Current
  13. 6 Nov 2026 · 17:32:22 UTC Source coverage: first-epssIncomplete → Current
  14. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  15. 6 Nov 2026 · 16:31:02 UTC Public detection templateNo Nuclei template listed → Unknown: detection-template evidence is incomplete or retained
  16. 6 Nov 2026 · 16:31:02 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  17. 6 Nov 2026 · 16:31:02 UTC Source coverage: first-epssCurrent → Incomplete
  18. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete

Explore global source statements, affected packages and advisory history for CVE-2026-120831. The catalog has a separate collection scope from Microsoft release records.

More advisories, affected versions and source history

cve-program · CVE-2026-120831

Published

libslirp

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 10",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "libslirp",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:10"
                    ]
                }

container-tools:rhel8/libslirp

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 8",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "container-tools:rhel8/libslirp",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:8"
                    ]
                }

libslirp

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat Enterprise Linux 9",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "libslirp",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:enterprise_linux:9"
                    ]
                }

libslirp

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Container Platform 4",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "libslirp",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:openshift:4"
                    ]
                }

openshift/ose-rhel-coreos-8

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Container Platform 4",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "openshift/ose-rhel-coreos-8",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:openshift:4"
                    ]
                }

openshift/ose-rhel-coreos-9

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Container Platform 4",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "openshift/ose-rhel-coreos-9",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:openshift:4"
                    ]
                }

openshift/ose-rhel-coreos-9

https://access.redhat.com/downloads/content/package-browser/

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Red Hat",
                    "product": "Red Hat OpenShift Container Platform 5",
                    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
                    "packageName": "openshift/ose-rhel-coreos-9",
                    "defaultStatus": "affected",
                    "cpes": [
                        "cpe:/a:redhat:openshift:5"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

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