DEBIAN-CVE-2025-66038

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Source
https://security-tracker.debian.org/tracker/CVE-2025-66038
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66038.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2025-66038
Upstream
Published
2026-03-30T18:16:18.177Z
Modified
2026-04-02T10:04:43.538090Z
Severity
  • 6.8 (Medium) CVSS_V3 - CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, sccompacttlvfindtag searches a compact-TLV buffer for a given tag. In compact-TLV, a single byte encodes the tag (high nibble) and value length (low nibble). With a 1-byte buffer {0x0A}, the encoded element claims tag=0 and length=10 but no value bytes follow. Calling sccompacttlvfindtag with search tag 0x00 returns a pointer equal to buf+1 and outlen=10 without verifying that the claimed value length fits within the remaining buffer. In cases where the sccompacttlvfind_tag is provided untrusted data (such as being read from cards/files), attackers may be able to influence it to return out-of-bounds pointers leading to downstream memory corruption when subsequent code tries to dereference the pointer. This issue has been patched in version 0.27.0.

References

Affected packages

Debian:11 / opensc

Package

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

Affected ranges

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

Affected versions

0.*
0.21.0-1
0.21.0-1+deb11u1
0.22.0-1
0.22.0-2
0.22.0-2.1
0.23.0-0.1
0.23.0-0.2
0.23.0-0.3
0.23.0-1
0.23.0-2
0.24.0~rc1-1
0.25.0~rc1-1
0.25.1-1
0.25.1-2
0.25.1-2.1
0.26.0-1
0.26.1-1
0.26.1-2
0.26.1-3
0.27.0~rc1-1
0.27.0~rc2-1
0.27.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66038.json"

Debian:12 / opensc

Package

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

Affected ranges

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

Affected versions

0.*
0.23.0-0.3
0.23.0-0.3+deb12u1
0.23.0-0.3+deb12u2
0.23.0-1
0.23.0-2
0.24.0~rc1-1
0.25.0~rc1-1
0.25.1-1
0.25.1-2
0.25.1-2.1
0.26.0-1
0.26.1-1
0.26.1-2
0.26.1-3
0.27.0~rc1-1
0.27.0~rc2-1
0.27.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66038.json"

Debian:13 / opensc

Package

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

Affected ranges

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

Affected versions

0.*
0.26.1-2
0.26.1-3
0.27.0~rc1-1
0.27.0~rc2-1
0.27.1-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66038.json"

Debian:14 / opensc

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.27.0~rc1-1

Affected versions

0.*
0.26.1-2
0.26.1-3

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2025-66038.json"