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CVE-2026-40528

OpenSC before 0.27.0, fixed in commit 0358817, contains a stack and heap buffer overrun vulnerability in the do_key_value() function in src/pkcs15init/profile.c that allows attackers to corrupt memory by supplying a crafted profile configuration file. During pkcs15-init invocation, a key value entry beginning with '=' followed by more than sizeof(keybuf) characters is copied into keybuf via memcpy without a length check, causing both stack and heap buffer overruns.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6464980b9638a9f3f1e74914287f0dd2eac3273e7d9333cdf50a6eef6b72a6f2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"PHYSICAL","availabilityImpact":"LOW","baseScore":3.8,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"PHYSICAL","baseScore":1,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/metrics/0/cvssV4_0
cwe · 2 assertions

{"cweId":"CWE-122","description":"Heap-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/problemTypes/0/descriptions/1

{"cweId":"CWE-121","description":"Stack-based Buffer Overflow","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","packageURL":"pkg:github/OpenSC/OpenSC","product":"OpenSC","repo":"https://github.com/OpenSC/OpenSC","vendor":"OpenSC","versions":[{"lessThan":"0.27.0","status":"affected","version":"0","versionType":"semver"},{"lessThan":"0358817ec74aeca654f83e7709c7720b14c5db59","status":"affected","version":"0","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"PHYSICAL","availabilityImpact":"LOW","baseScore":3.8,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:P/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"NONE","attackVector":"PHYSICAL","baseScore":1,"baseSeverity":"LOW","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:P/AC:H/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"LOW","vulnConfidentialityImpact":…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-122","description":"Heap-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/problemTypes/0/descriptions/1
{"cweId":"CWE-121","description":"Stack-based Buffer Overflow","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"tags":["patch"],"url":"https://github.com/OpenSC/OpenSC/commit/0358817ec74aeca654f83e7709c7720b14c5db59"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/opensc-buffer-overrun-in-do-key-value-via-profile-c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2b00ab4c4dea97da42531156199d5607b1f079e804d48264f92a58c834d505bd · sha256:f91754fd50c58c34… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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