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4 vulnerabilities found for libtpms by stefanberger
CVE-2026-21444 (GCVE-0-2026-21444)
Vulnerability from nvd – Published: 2026-01-02 19:05 – Updated: 2026-01-05 20:37
VLAI
Title
libtpms returns wrong initialization vector when certain symmetric ciphers are used
Summary
libtpms, a library that provides software emulation of a Trusted Platform Module, has a flaw in versions 0.10.0 and 0.10.1. The commonly used integration of libtpms with OpenSSL 3.x contained a vulnerability related to the returned IV (initialization vector) when certain symmetric ciphers were used. Instead of returning the last IV it returned the initial IV to the caller, thus weakening the subsequent encryption and decryption steps. The highest threat from this vulnerability is to data confidentiality. Version 0.10.2 fixes the issue. No known workarounds are available.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/stefanberger/libtpms/security/… | x_refsource_CONFIRM |
| https://github.com/stefanberger/libtpms/issues/541 | x_refsource_MISC |
| https://github.com/stefanberger/libtpms/commit/33… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| stefanberger | libtpms |
Affected:
>= 0.10.0, < 0.10.2
|
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CVE-2025-49133 (GCVE-0-2025-49133)
Vulnerability from nvd – Published: 2025-06-10 19:46 – Updated: 2025-11-03 20:05
VLAI
Title
Libtpms contains a possible out-of-bound access and abort due to HMAC signing issue
Summary
Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the ‘CryptHmacSign’ function with an inconsistent pairing of the signKey and signScheme parameters, where the signKey is ALG_KEYEDHASH key and inScheme is an ECC or RSA scheme. The reported vulnerability is in the ‘CryptHmacSign’ function, which is defined in the "Part 4: Supporting Routines – Code" document, section "7.151 - /tpm/src/crypt/CryptUtil.c ". This vulnerability can be triggered from user-mode applications by sending malicious commands to a TPM 2.0/vTPM (swtpm) whose firmware is based on an affected TCG reference implementation. The effect on libtpms is that it will cause an abort due to the detection of the out-of-bounds access, thus for example making a vTPM (swtpm) unavailable to a VM. This vulnerability is fixed in 0.7.12, 0.8.10, 0.9.7, and 0.10.1.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/stefanberger/libtpms/security/… | x_refsource_CONFIRM |
| https://github.com/stefanberger/libtpms/commit/04… | x_refsource_MISC |
| https://trustedcomputinggroup.org/resource/tpm-li… | x_refsource_MISC |
| https://trustedcomputinggroup.org/wp-content/uplo… | x_refsource_MISC |
| https://www.kb.cert.org/vuls/id/282450 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| stefanberger | libtpms |
Affected:
= 0.7.11
Affected: = 0.8.9 Affected: = 0.9.6 Affected: = 0.10.0 |
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CVE-2026-21444 (GCVE-0-2026-21444)
Vulnerability from cvelistv5 – Published: 2026-01-02 19:05 – Updated: 2026-01-05 20:37
VLAI
Title
libtpms returns wrong initialization vector when certain symmetric ciphers are used
Summary
libtpms, a library that provides software emulation of a Trusted Platform Module, has a flaw in versions 0.10.0 and 0.10.1. The commonly used integration of libtpms with OpenSSL 3.x contained a vulnerability related to the returned IV (initialization vector) when certain symmetric ciphers were used. Instead of returning the last IV it returned the initial IV to the caller, thus weakening the subsequent encryption and decryption steps. The highest threat from this vulnerability is to data confidentiality. Version 0.10.2 fixes the issue. No known workarounds are available.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/stefanberger/libtpms/security/… | x_refsource_CONFIRM |
| https://github.com/stefanberger/libtpms/issues/541 | x_refsource_MISC |
| https://github.com/stefanberger/libtpms/commit/33… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| stefanberger | libtpms |
Affected:
>= 0.10.0, < 0.10.2
|
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CVE-2025-49133 (GCVE-0-2025-49133)
Vulnerability from cvelistv5 – Published: 2025-06-10 19:46 – Updated: 2025-11-03 20:05
VLAI
Title
Libtpms contains a possible out-of-bound access and abort due to HMAC signing issue
Summary
Libtpms is a library that targets the integration of TPM functionality into hypervisors, primarily into Qemu. Libtpms, which is derived from the TPM 2.0 reference implementation code published by the Trusted Computing Group, is prone to a potential out of bounds (OOB) read vulnerability. The vulnerability occurs in the ‘CryptHmacSign’ function with an inconsistent pairing of the signKey and signScheme parameters, where the signKey is ALG_KEYEDHASH key and inScheme is an ECC or RSA scheme. The reported vulnerability is in the ‘CryptHmacSign’ function, which is defined in the "Part 4: Supporting Routines – Code" document, section "7.151 - /tpm/src/crypt/CryptUtil.c ". This vulnerability can be triggered from user-mode applications by sending malicious commands to a TPM 2.0/vTPM (swtpm) whose firmware is based on an affected TCG reference implementation. The effect on libtpms is that it will cause an abort due to the detection of the out-of-bounds access, thus for example making a vTPM (swtpm) unavailable to a VM. This vulnerability is fixed in 0.7.12, 0.8.10, 0.9.7, and 0.10.1.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-125 - Out-of-bounds Read
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/stefanberger/libtpms/security/… | x_refsource_CONFIRM |
| https://github.com/stefanberger/libtpms/commit/04… | x_refsource_MISC |
| https://trustedcomputinggroup.org/resource/tpm-li… | x_refsource_MISC |
| https://trustedcomputinggroup.org/wp-content/uplo… | x_refsource_MISC |
| https://www.kb.cert.org/vuls/id/282450 |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| stefanberger | libtpms |
Affected:
= 0.7.11
Affected: = 0.8.9 Affected: = 0.9.6 Affected: = 0.10.0 |
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"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.9,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-125",
"description": "CWE-125: Out-of-bounds Read",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-06-10T19:46:27.397Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/stefanberger/libtpms/security/advisories/GHSA-25w5-6fjj-hf8g",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/stefanberger/libtpms/security/advisories/GHSA-25w5-6fjj-hf8g"
},
{
"name": "https://github.com/stefanberger/libtpms/commit/04b2d8e9afc0a9b6bffe562a23e58c0de11532d1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/stefanberger/libtpms/commit/04b2d8e9afc0a9b6bffe562a23e58c0de11532d1"
},
{
"name": "https://trustedcomputinggroup.org/resource/tpm-library-specification",
"tags": [
"x_refsource_MISC"
],
"url": "https://trustedcomputinggroup.org/resource/tpm-library-specification"
},
{
"name": "https://trustedcomputinggroup.org/wp-content/uploads/TPM-2.0-1.83-Part-4-Supporting-Routines-Code.pdf",
"tags": [
"x_refsource_MISC"
],
"url": "https://trustedcomputinggroup.org/wp-content/uploads/TPM-2.0-1.83-Part-4-Supporting-Routines-Code.pdf"
}
],
"source": {
"advisory": "GHSA-25w5-6fjj-hf8g",
"discovery": "UNKNOWN"
},
"title": "Libtpms contains a possible out-of-bound access and abort due to HMAC signing issue"
}
},
"cveMetadata": {
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"cveId": "CVE-2025-49133",
"datePublished": "2025-06-10T19:46:27.397Z",
"dateReserved": "2025-06-02T10:39:41.633Z",
"dateUpdated": "2025-11-03T20:05:08.172Z",
"state": "PUBLISHED"
},
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}