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9 vulnerabilities found for liboqs by open-quantum-safe

CVE-2026-47738 (GCVE-0-2026-47738)
Vulnerability from cvelistv5
Published
2026-11-06 21:23
Modified
2026-11-06 21:23
CWE
  • CWE-824 - Access of Uninitialized Pointer
Summary
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, OQS_KEM_encaps_derand can dereference an uninitialized encaps_derand function pointer when called on NTRU-HPS-2048-509, NTRU-HPS-2048-677, NTRU-HPS-4096-821, NTRU-HPS-4096-1229, NTRU-HRSS-701, or NTRU-HRSS-1373. The affected NTRU constructors omit the OQS_KEM.encaps_derand member because those schemes do not support derandomized encapsulation, OQS_KEM objects are allocated without zero initialization, and the wrapper in src/kem/kem.c checks only that the OQS_KEM pointer is non-null before calling through the residual heap value. An application is affected only if it instantiates one of those six NTRU KEMs and invokes OQS_KEM_encaps_derand on it. The supported impact is a calling-process crash and denial of service. This issue is fixed in version 0.16.0.
Impacted products
Vendor Product Version
open-quantum-safe liboqs Version: < 0.16.0
Create a notification for this product.
Show details on NVD website


{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "liboqs",
          "vendor": "open-quantum-safe",
          "versions": [
            {
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              "version": "\u003c 0.16.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, OQS_KEM_encaps_derand can dereference an uninitialized encaps_derand function pointer when called on NTRU-HPS-2048-509, NTRU-HPS-2048-677, NTRU-HPS-4096-821, NTRU-HPS-4096-1229, NTRU-HRSS-701, or NTRU-HRSS-1373. The affected NTRU constructors omit the OQS_KEM.encaps_derand member because those schemes do not support derandomized encapsulation, OQS_KEM objects are allocated without zero initialization, and the wrapper in src/kem/kem.c checks only that the OQS_KEM pointer is non-null before calling through the residual heap value. An application is affected only if it instantiates one of those six NTRU KEMs and invokes OQS_KEM_encaps_derand on it. The supported impact is a calling-process crash and denial of service. This issue is fixed in version 0.16.0."
        }
      ],
      "metrics": [
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "baseScore": 5.3,
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          }
        }
      ],
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        {
          "descriptions": [
            {
              "cweId": "CWE-824",
              "description": "CWE-824: Access of Uninitialized Pointer",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
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      },
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        {
          "name": "https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-jr5q-r9qx-v738",
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          ],
          "url": "https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-jr5q-r9qx-v738"
        },
        {
          "name": "https://github.com/open-quantum-safe/liboqs/pull/2460",
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            "x_refsource_MISC"
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          "url": "https://github.com/open-quantum-safe/liboqs/pull/2460"
        },
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          "name": "https://github.com/open-quantum-safe/liboqs/commit/80ceff0207658eba98bae8eb22ca3aa2a364f40b",
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        {
          "name": "https://github.com/open-quantum-safe/liboqs/releases/tag/0.16.0",
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        }
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      "source": {
        "advisory": "GHSA-jr5q-r9qx-v738",
        "discovery": "UNKNOWN"
      },
      "title": "liboqs: Uninitialized function-pointer dereference in OQS_KEM_encaps_derand for NTRU KEMs"
    }
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CVE-2026-44519 (GCVE-0-2026-44519)
Vulnerability from cvelistv5
Published
2026-11-06 21:22
Modified
2026-11-06 21:22
CWE
Summary
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, the ct_select function in src/kem/frodokem/external/util.c for the FrodoKEM-640, FrodoKEM-976, and FrodoKEM-1344 AES and SHAKE reference variants lacks a value barrier in the Fujisaki-Okamoto implicit-rejection path. When compiled with Clang 17 or later at an affected optimization level such as -Os, the compiler can emit a secret-dependent conditional load, causing the real and rejection secret paths to leave distinguishable cache residency after successful and failed decapsulation. A local attacker able to perform repeated cache-timing measurements may use this oracle as part of a private-key recovery attack. Default -O3 builds vectorize both source loads and do not exhibit the reported behavior, and the advisory does not report the same generated memory-access pattern in NTRU, NTRU-Prime, BIKE, HQC, Classic McEliece, Kyber, or the already-barriered ML-KEM implementation. This issue is fixed in version 0.16.0.
Impacted products
Vendor Product Version
open-quantum-safe liboqs Version: < 0.16.0
Create a notification for this product.
Show details on NVD website


{
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        }
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            {
              "cweId": "CWE-385",
              "description": "CWE-385: Covert Timing Channel",
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      "title": "liboqs: Missing value barrier in FO implicit rejection path (FrodoKEM, NTRU, and others)"
    }
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CVE-2026-104254 (GCVE-0-2026-104254)
Vulnerability from cvelistv5
Published
2026-11-06 21:20
Modified
2026-11-06 21:20
CWE
Summary
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. From 0.11.0 through 0.16.0, builds configured with OQS_ENABLE_SIG_STFL_LMS=ON can read beyond a caller-supplied signature buffer when an untrusted truncated LMS or HSS-LMS signature reaches OQS_SIG_STFL_verify or OQS_SIG_STFL_alg_lms_verify. In hss_validate_signature_init() in src/sig_stfl/lms/external/hss_verify_inc.c, consumed-length checks do not ensure that the bottom-level q and C fields remain available, allowing up to 32 bytes to be read past the buffer. In version 0.16.0, is_hss_public_key() also reads at offset 8 after only a four-byte length check, allowing an over-read of up to eight bytes. No valid signature is required, but the public key must be syntactically plausible. The read data is consumed only by an internal hash and is not exposed, so the supported impact is a possible verifier crash and denial of service, not memory disclosure or acceptance of an invalid signature. This issue is scheduled to be fixed in version 0.17.0.
Impacted products
Vendor Product Version
open-quantum-safe liboqs Version: >= 0.11.0, <= 0.16.0
Create a notification for this product.
Show details on NVD website


{
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    "cna": {
      "affected": [
        {
          "product": "liboqs",
          "vendor": "open-quantum-safe",
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        }
      ],
      "metrics": [
        {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
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        {
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      "title": "liboqs: Heap out-of-bounds read in LMS/HSS signature verification via unvalidated signature length (hss_verify_inc.c:215)"
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CVE-2026-46344 (GCVE-0-2026-46344)
Vulnerability from cvelistv5
Published
2026-05-29 18:08
Modified
2026-05-29 18:39
CWE
Summary
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, an out-of-bounds read has been identified in the XMSS and XMSS^MT stateful signature verification code. When the verification function is called with a correctly-sized signature buffer for the declared algorithm but a public key whose OID bytes (pk[0..3]) reference a different XMSS parameter set with a larger sig_bytes, the implementation re-parses the OID from the public key inside xmss_sign_open / xmssmt_sign_open and uses the resulting (larger) sig_bytes to index the caller-supplied signature buffer. As with CVE-2026-44518, the out-of-bounds bytes are consumed only as input to an internal hash computation and are not returned to the caller, so no oracle exists to leak their contents to an attacker. The primary observable effect is a possible crash (denial of service) of the verifying process if the read crosses into an unmapped memory page. This vulnerability is fixed in 0.16.0.
Impacted products
Vendor Product Version
open-quantum-safe liboqs Version: < 0.16.0
Create a notification for this product.
Show details on NVD website


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CVE-2026-44518 (GCVE-0-2026-44518)
Vulnerability from cvelistv5
Published
2026-05-29 18:07
Modified
2026-05-29 18:41
CWE
  • CWE-20 - Improper Input Validation
  • CWE-125 - Out-of-bounds Read
Summary
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, an out-of-bounds read has been identified in the XMSS and XMSS^MT stateful signature verification code. When the verification function is called with a signature buffer shorter than the expected signature size for the given parameter set, the implementation does not validate the caller-supplied length and proceeds to read past the end of the buffer. The out-of-bounds bytes are consumed only as input to an internal hash computation and are not returned to the caller, so no oracle exists to leak their contents to an attacker. The primary observable effect is a possible crash (denial of service) of the verifying process if the read crosses into an unmapped memory page. This vulnerability is fixed in 0.16.0.
Impacted products
Vendor Product Version
open-quantum-safe liboqs Version: < 0.16.0
Create a notification for this product.
Show details on NVD website


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CVE-2025-52473 (GCVE-0-2025-52473)
Vulnerability from cvelistv5
Published
2025-07-10 18:42
Modified
2025-07-10 19:16
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Summary
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Multiple secret-dependent branches have been identified in the reference implementation of the HQC key encapsulation mechanism when it is compiled with Clang for optimization levels above -O0 (-O1, -O2, etc). A proof-of-concept local attack exploits this secret-dependent information to recover the entire secret key. This vulnerability is fixed in 0.14.0.
Impacted products
Vendor Product Version
open-quantum-safe liboqs Version: < 0.14.0
Create a notification for this product.
Show details on NVD website


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CVE-2025-48946 (GCVE-0-2025-48946)
Vulnerability from cvelistv5
Published
2025-05-30 19:21
Modified
2025-05-30 20:43
CWE
  • CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Summary
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. liboqs prior to version 0.13.0 supports the HQC algorithm, an algorithm with a theoretical design flaw which leads to large numbers of malformed ciphertexts sharing the same implicit rejection value. Currently, no concrete attack on the algorithm is known. However, prospective users of HQC must take extra care when using the algorithm in protocols involving key derivation. In particular, HQC does not provide the same security guarantees as Kyber or ML-KEM. There is currently no patch for the HQC flaw available in liboqs, so HQC is disabled by default in liboqs starting from version 0.13.0. OQS will update its implementation after the HQC team releases an updated algorithm specification.
Impacted products
Vendor Product Version
open-quantum-safe liboqs Version: < 0.13.0
Create a notification for this product.
Show details on NVD website


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CVE-2024-54137 (GCVE-0-2024-54137)
Vulnerability from cvelistv5
Published
2024-12-06 16:00
Modified
2024-12-10 16:10
CWE
  • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Summary
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. A correctness error has been identified in the reference implementation of the HQC key encapsulation mechanism. Due to an indexing error, part of the secret key is incorrectly treated as non-secret data. This results in an incorrect shared secret value being returned when the decapsulation function is called with a malformed ciphertext. This vulnerability is fixed in 0.12.0.
Impacted products
Vendor Product Version
open-quantum-safe liboqs Version: < 0.12.0
Create a notification for this product.
Show details on NVD website


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CVE-2024-36405 (GCVE-0-2024-36405)
Vulnerability from cvelistv5
Published
2024-06-10 12:47
Modified
2024-08-02 03:37
CWE
  • CWE-208 - Observable Timing Discrepancy
  • CWE-385 - Covert Timing Channel
Summary
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. A control-flow timing lean has been identified in the reference implementation of the Kyber key encapsulation mechanism when it is compiled with Clang 15-18 for `-Os`, `-O1`, and other compilation options. A proof-of-concept local attack on the reference implementation leaks the entire ML-KEM 512 secret key in ~10 minutes using end-to-end decapsulation timing measurements. The issue has been fixed in version 0.10.1. As a possible workaround, some compiler options may produce vectorized code that does not leak secret information, however relying on these compiler options as a workaround may not be reliable.
Impacted products
Vendor Product Version
open-quantum-safe liboqs Version: < 0.10.1
Create a notification for this product.
Show details on NVD website


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            "name": "https://github.com/pq-crystals/kyber/commit/9b8d30698a3e7449aeb34e62339d4176f11e3c6c",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/pq-crystals/kyber/commit/9b8d30698a3e7449aeb34e62339d4176f11e3c6c"
          },
          {
            "name": "https://github.com/open-quantum-safe/liboqs/blob/7eecda6095c003ddded7175a1ffdf35a2ce63ed5/src/kem/kyber/pqcrystals-kyber_kyber512_ref/poly.c#L166",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/open-quantum-safe/liboqs/blob/7eecda6095c003ddded7175a1ffdf35a2ce63ed5/src/kem/kyber/pqcrystals-kyber_kyber512_ref/poly.c#L166"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "liboqs",
          "vendor": "open-quantum-safe",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.10.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. A control-flow timing lean has been identified in the reference implementation of the Kyber key encapsulation mechanism when it is compiled with Clang 15-18 for `-Os`, `-O1`, and other compilation options. A proof-of-concept local attack on the reference implementation leaks the entire ML-KEM 512 secret key in ~10 minutes using end-to-end decapsulation timing measurements. The issue has been fixed in version 0.10.1. As a possible workaround, some compiler options may produce vectorized code that does not leak secret information, however relying on these compiler options as a workaround may not be reliable."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-208",
              "description": "CWE-208: Observable Timing Discrepancy",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-385",
              "description": "CWE-385: Covert Timing Channel",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-06-10T12:47:17.934Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-f2v9-5498-2vpp",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-f2v9-5498-2vpp"
        },
        {
          "name": "https://github.com/open-quantum-safe/liboqs/commit/982c762c242ef549c914891b47bf6e0ed6321f91",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-quantum-safe/liboqs/commit/982c762c242ef549c914891b47bf6e0ed6321f91"
        },
        {
          "name": "https://github.com/pq-crystals/kyber/commit/9b8d30698a3e7449aeb34e62339d4176f11e3c6c",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/pq-crystals/kyber/commit/9b8d30698a3e7449aeb34e62339d4176f11e3c6c"
        },
        {
          "name": "https://github.com/open-quantum-safe/liboqs/blob/7eecda6095c003ddded7175a1ffdf35a2ce63ed5/src/kem/kyber/pqcrystals-kyber_kyber512_ref/poly.c#L166",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/open-quantum-safe/liboqs/blob/7eecda6095c003ddded7175a1ffdf35a2ce63ed5/src/kem/kyber/pqcrystals-kyber_kyber512_ref/poly.c#L166"
        }
      ],
      "source": {
        "advisory": "GHSA-f2v9-5498-2vpp",
        "discovery": "UNKNOWN"
      },
      "title": "Control-flow timing leak in Kyber reference implementation when compiled with Clang 15-18 for -Os, -O1 and other options"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-36405",
    "datePublished": "2024-06-10T12:47:17.934Z",
    "dateReserved": "2024-05-27T15:59:57.031Z",
    "dateUpdated": "2024-08-02T03:37:05.189Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}