DEBIAN-CVE-2026-18238

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Source
https://security-tracker.debian.org/tracker/CVE-2026-18238
Import Source
https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18238.json
JSON Data
https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-18238
Upstream
Published
2026-09-05T19:16:55Z
Modified
2026-09-15T08:00:08Z
Severity
  • 5.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

The rpcap client code that processes a RPCAP_MSG_PACKET message received from the server incorrectly validates its headers. A malicious server can send a crafted message and cause the client to treat up to 20 bytes of the client process memory beyond the end of the buffer as if it was a part of the captured packet.

References

Affected packages

Debian:12 / libpcap

Package

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

Affected ranges

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

Affected versions

1.*
1.10.3-1
1.10.4-1
1.10.4-2
1.10.4-3
1.10.4-4
1.10.4-4.1~exp1
1.10.4-4.1
1.10.4-5
1.10.4-5+hurd.1
1.10.5-1
1.10.5-2
1.10.6-1
1.10.6-2
1.10.7-1

Ecosystem specific 

{
    "urgency":  "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18238.json"

Debian:13 / libpcap

Package

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

Affected ranges

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

Affected versions

1.*
1.10.5-2
1.10.6-1
1.10.6-2
1.10.7-1

Ecosystem specific 

{
    "urgency":  "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18238.json"

Debian:14 / libpcap

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.10.7-1

Affected versions

1.*
1.10.5-2
1.10.6-1
1.10.6-2

Ecosystem specific 

{
    "urgency":  "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18238.json"