DEBIAN-CVE-2026-120831

Source
https://security-tracker.debian.org/tracker/CVE-2026-120831
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120831.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-120831
Upstream
Published
2026-11-03T02:16:53Z
Modified
2026-11-04T09:47:27Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

A flaw was found in libslirp in if_output(). When moving a session from the fast queue to the batch queue, the code unlinked and reinserted an arbitrary packet via ifm->m_nextpkt instead of the session queue head, corrupting queue pointers. A guest generating burst traffic could crash the host networking process, causing a denial of service.

References

Affected packages

Debian:12 / libslirp

Package

Name
libslirp
Purl
pkg:deb/debian/libslirp?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.7.0-1
4.8.0-1
4.9.1-1
4.9.2-1
4.9.3-1
4.9.4-1
4.9.5-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120831.json"

Debian:13 / libslirp

Package

Name
libslirp
Purl
pkg:deb/debian/libslirp?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.8.0-1
4.8.0-1+deb13u1
4.9.1-1
4.9.2-1
4.9.3-1
4.9.4-1
4.9.5-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120831.json"

Debian:14 / libslirp

Package

Name
libslirp
Purl
pkg:deb/debian/libslirp?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

4.*
4.8.0-1
4.9.1-1
4.9.2-1
4.9.3-1
4.9.4-1
4.9.5-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Database specific

source
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-120831.json"