DEBIAN-CVE-2026-9539

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Source
https://security-tracker.debian.org/tracker/CVE-2026-9539
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-9539.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-9539
Upstream
Published
2026-06-24T05:17:31Z
Modified
2026-09-14T17:03:50Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

An out-of-bounds heap read and integer underflow in the TCP urgent data handling (sosendoob) in freedesktop.org libslirp version before v4.9.2 on hypervisor host environments (e.g., QEMU) allows a privileged guest VM attacker (root or CAP_NET_RAW) to leak gigabytes of sensitive host-process heap memory via sending crafted TCP segments with manipulated URG flags and urgent pointers (ti_urp).

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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-9539.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
Fixed
4.8.0-1+deb13u1

Affected versions

4.*
4.8.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-9539.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
Fixed
4.9.2-1

Affected versions

4.*
4.8.0-1
4.9.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-9539.json"