CVE-2025-66038

mediumpriority · track · 27EPSS 0.003 · 20 %ileDEEUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.28% (20th) EPSS
CVSS 6.8 · medium
Is it mine?
6 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-22

OpenSC is an open source smart card tools and middleware. Prior to version 0.27.0, sc_compacttlv_find_tag 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 sc_compacttlv_find_tag 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 sc_compacttlv_find_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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • Fixedopensc-0:0.27.1-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedopensc-0:0.27.1-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedopensc-0:0.27.1-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedopensc-0:0.27.1-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedopensc-bash-completion-0:0.27.1-1.1.aarch64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedopensc-bash-completion-0:0.27.1-1.1.ppc64le as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedopensc-bash-completion-0:0.27.1-1.1.s390x as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

  • Fixedopensc-bash-completion-0:0.27.1-1.1.x86_64 as component of openSUSE Tumbleweedsuse_csaf

    To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

02

cvss

Technical severity, 0–10. One row per scoring source.

6.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.9–6.8

v3.16.8mediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 0.9 · impact 5.9
v3.13.9lowCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · ENISA EU
v3.13.9lowCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · security-advisories@github.comexploitability 0.5 · impact 3.4
v3.16.2mediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.13.9lowCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · SUSE Product Security
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-126US
05

affected products (6)

Products and version ranges known to be affected.

06

advisories (2)

Vendor and ecosystem advisories describing this.

  • WID-SEC-W-2026-0917OpenSC: Mehrere Schwachstellen ermöglichen nicht spezifizierten AngriffDeutsch2026-03-30csaf · cert_bundDE

    Ein Angreifer mit physischem Zugriff kann mehrere Schwachstellen in OpenSC ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, möglicherweise einen Denial-of-Service-Zustand herbeizuführen, eine Speicherbeschädigung zu bewirken oder vertrauliche Informationen offenzulegen.

  • openSUSE-SU-2026:10475-1opensc-0.27.1-1.1 on GA media2026-04-01csaf · suse_csafDE

    opensc-0.27.1-1.1 on GA media

07

also known as (2)

Other names and identifiers for this entity.

08

sources

Which sources assert this record, and when.

cnnvdenisa_euvdcert_bundnvdsuse_csafNVDCVE.orgMITRE
published 2026-03-30modified 2026-06-17
09

references (11)

External citations — patches, advisories, analysis.

scry

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