Skip to content
Heist/ feed
UnratedFix available

ALPINE-CVE-2026-31790

Type: advisorySource: OSV1 source record

Issue summary: Applications using RSASVE key encapsulation to establish a secret encryption key can send contents of an uninitialized memory buffer to a malicious peer. Impact summary: The uninitialized buffer might contain sensitive data from the previous execution of the application process which leads to sensitive data leakage to an attacker. RSA_public_encrypt() returns the number of bytes written on success and -1 on error. The affected code tests only whether the return value is non-zero. As a result, if RSA encryption fails, encapsulation can still return success to the caller, set the output lengths, and leave the caller to use the contents of the ciphertext buffer as if a valid KEM ciphertext had been produced. If applications use EVP_PKEY_encapsulate() with RSA/RSASVE on an attacker-supplied invalid RSA public key without first validating that key, then this may cause stale or uninitialized contents of the caller-provided ciphertext buffer to be disclosed to the attacker in place of the KEM ciphertext. As a workaround calling EVP_PKEY_public_check() or EVP_PKEY_public_check_quick() before EVP_PKEY_encapsulate() will mitigate the issue. The FIPS modules in 3.6, 3.5, 3.4, 3.3, 3.1 and 3.0 are affected by this issue.

Announced Source revision 1
Original source ↗

ALPINE-CVE-2026-31790

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:ALPINE-CVE-2026-31790

openssl

Source reference: /affected/0/package/name

Affected versions
Not stated in this record
Fixed versions
3.3.7-r0

Source reference: /affected/0/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
3.3.7-r0

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/2/package/name

Affected versions
Not stated in this record
Fixed versions
3.5.6-r0

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/3/package/name

Affected versions
Not stated in this record
Fixed versions
3.5.6-r0

Source reference: /affected/3/ranges

Prerequisites
Not stated in this record

openssl

Source reference: /affected/4/package/name

Affected versions
Not stated in this record
Fixed versions
3.5.6-r0

Source reference: /affected/4/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.3.7-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.20"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-31790.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.3.7-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.21"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-31790.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.5.6-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.22"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-31790.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.5.6-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.23"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-31790.json"
    },
    "ecosystem_specific": {}
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "3.0.0"
          },
          {
            "fixed": "3.5.6-r0"
          }
        ]
      }
    ],
    "package": {
      "name": "openssl",
      "purl": "pkg:apk/alpine/openssl?arch=source",
      "ecosystem": "Alpine:v3.24"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-31790.json"
    },
    "ecosystem_specific": {}
  }
]

Publisher severity

No explicit severity was provided.

Event
#54242 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement