DEBIAN-CVE-2026-85534

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Source
https://security-tracker.debian.org/tracker/CVE-2026-85534
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-85534.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-85534
Upstream
  • CVE-2026-85534
Published
2026-09-04T11:17:19Z
Modified
2026-09-09T08:47:34Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

A flaw was found in libsoup. When a client sends an HTTP/2 request body from a non-pollable input stream, the library can buffer more data than the current flow-control window later allows. A malicious HTTP/2 server can shrink SETTINGS_INITIAL_WINDOW_SIZE while that buffered read is still in progress. The client then copies the full buffer into a smaller DATA callback without a runtime bounds check, which can abort the process or fail the HTTP/2 session.

References

Affected packages

Debian:12 / libsoup2.4

Package

Name
libsoup2.4
Purl
pkg:deb/debian/libsoup2.4?arch=source&distro=bookworm

Affected ranges

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

Affected versions

2.*
2.74.3-1
2.74.3-1+deb12u1
2.74.3-2
2.74.3-3
2.74.3-3.1~exp1
2.74.3-3.1~exp2
2.74.3-3.1~exp3
2.74.3-5
2.74.3-6
2.74.3-7
2.74.3-8
2.74.3-8.1
2.74.3-9
2.74.3-10
2.74.3-10.1
2.74.3-11

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-85534.json"

Debian:13 / libsoup2.4

Package

Name
libsoup2.4
Purl
pkg:deb/debian/libsoup2.4?arch=source&distro=trixie

Affected ranges

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

Affected versions

2.*
2.74.3-10.1
2.74.3-11

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-85534.json"

Debian:12 / libsoup3

Package

Name
libsoup3
Purl
pkg:deb/debian/libsoup3?arch=source&distro=bookworm

Affected ranges

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

Affected versions

3.*
3.2.2-2
3.2.3-0+deb12u1
3.2.3-0+deb12u2
3.3.1-1
3.4.0-1
3.4.1-1
3.4.2-1
3.4.2-2
3.4.2-3
3.4.2-4
3.4.3-1
3.4.4-1
3.4.4-2
3.4.4-3
3.4.4-4
3.4.4-5
3.5.2-1
3.6.0-1
3.6.0-2
3.6.0-3
3.6.0-4
3.6.1-1
3.6.4-1
3.6.4-2
3.6.4-3
3.6.5-1
3.6.5-2
3.6.5-3
3.6.5-4
3.6.5-5
3.6.5-6
3.6.5-7
3.6.5-8
3.6.5-9
3.6.6-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-85534.json"

Debian:13 / libsoup3

Package

Name
libsoup3
Purl
pkg:deb/debian/libsoup3?arch=source&distro=trixie

Affected ranges

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

Affected versions

3.*
3.6.5-3
3.6.5-4
3.6.5-5
3.6.5-6
3.6.5-7
3.6.5-8
3.6.5-9
3.6.6-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-85534.json"

Debian:14 / libsoup3

Package

Name
libsoup3
Purl
pkg:deb/debian/libsoup3?arch=source&distro=forky

Affected ranges

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

Affected versions

3.*
3.6.5-3
3.6.5-4
3.6.5-5
3.6.5-6
3.6.5-7
3.6.5-8
3.6.5-9
3.6.6-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-85534.json"