DEBIAN-CVE-2025-65495

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Source
https://security-tracker.debian.org/tracker/CVE-2025-65495
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-65495.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2025-65495
Upstream
Published
2025-11-24T14:15:47.053Z
Modified
2026-01-10T14:00:52.879837Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

Integer signedness error in tlsverifycallback() in src/coapopenssl.c in OISM libcoap 4.3.5 allows remote attackers to cause a denial of service via a crafted TLS certificate that causes i2d_X509() to return -1 and be misused as a malloc() size parameter.

References

Affected packages

Debian:11 / libcoap2

Package

Name
libcoap2
Purl
pkg:deb/debian/libcoap2?arch=source

Affected ranges

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

Affected versions

4.*
4.2.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-65495.json"

Debian:12 / libcoap3

Package

Name
libcoap3
Purl
pkg:deb/debian/libcoap3?arch=source

Affected ranges

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

Affected versions

4.*
4.3.1-1
4.3.1-2
4.3.3-1
4.3.4-1
4.3.4-1.1~exp1
4.3.4-1.1
4.3.5-1
4.3.5-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-65495.json"

Debian:13 / libcoap3

Package

Name
libcoap3
Purl
pkg:deb/debian/libcoap3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.4-1.1+deb13u2

Affected versions

4.*
4.3.4-1.1
4.3.4-1.1+deb13u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-65495.json"

Debian:14 / libcoap3

Package

Name
libcoap3
Purl
pkg:deb/debian/libcoap3?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
4.3.5-2

Affected versions

4.*
4.3.4-1.1
4.3.5-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-65495.json"