DEBIAN-CVE-2026-31790
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.
DEBIAN-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:DEBIAN-CVE-2026-31790
openssl
Source reference: /affected/0/package/name
- Affected versions
- 3.0.10-1
Source reference:
/affected/0/versions3.0.10-1~deb12u1Source reference:
/affected/0/versions3.0.11-1Source reference:
/affected/0/versions3.0.11-1~deb12u1Source reference:
/affected/0/versions3.0.11-1~deb12u2Source reference:
/affected/0/versions3.0.12-1Source reference:
/affected/0/versions3.0.12-2Source reference:
/affected/0/versions3.0.13-1~deb12u1Source reference:
/affected/0/versions3.0.13-1~deb12u2Source reference:
/affected/0/versions3.0.14-1~deb12u1Source reference:
/affected/0/versions3.0.14-1~deb12u2Source reference:
/affected/0/versions3.0.15-1~deb12u1Source reference:
/affected/0/versions3.0.16-1~deb12u1Source reference:
/affected/0/versions3.0.17-1~deb12u1Source reference:
/affected/0/versions3.0.17-1~deb12u2Source reference:
/affected/0/versions3.0.17-1~deb12u3Source reference:
/affected/0/versions3.0.18-1~deb12u1Source reference:
/affected/0/versions3.0.18-1~deb12u2Source reference:
/affected/0/versions3.0.19-1~deb12u1Source reference:
/affected/0/versions3.0.9-1Source reference:
/affected/0/versions - Fixed versions
- 3.0.19-1~deb12u2
Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
openssl
Source reference: /affected/1/package/name
- Affected versions
- 3.5.1-1
Source reference:
/affected/1/versions3.5.1-1+deb13u1Source reference:
/affected/1/versions3.5.2-1Source reference:
/affected/1/versions3.5.3-1Source reference:
/affected/1/versions3.5.4-1Source reference:
/affected/1/versions3.5.4-1~deb13u1Source reference:
/affected/1/versions3.5.4-1~deb13u2Source reference:
/affected/1/versions3.5.5-1~deb13u1Source reference:
/affected/1/versions - Fixed versions
- 3.5.5-1~deb13u2
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
openssl
Source reference: /affected/2/package/name
- Affected versions
- 3.5.1-1
Source reference:
/affected/2/versions3.5.2-1Source reference:
/affected/2/versions3.5.3-1Source reference:
/affected/2/versions3.5.4-1Source reference:
/affected/2/versions3.5.4-1~deb13u1Source reference:
/affected/2/versions3.5.4-1~deb13u2Source reference:
/affected/2/versions3.5.5-1Source reference:
/affected/2/versions3.5.5-1~deb13u1Source reference:
/affected/2/versions3.5.5-1~deb13u2Source reference:
/affected/2/versions3.5.6-1~deb13u1Source reference:
/affected/2/versions3.5.6-1~deb13u2Source reference:
/affected/2/versions3.5.7-1~deb13u1Source reference:
/affected/2/versions3.5.7-1~deb13u2Source reference:
/affected/2/versions3.5.7-1~deb13u3Source reference:
/affected/2/versions3.6.0-1Source reference:
/affected/2/versions3.6.0-2Source reference:
/affected/2/versions3.6.0~~alpha1-1Source reference:
/affected/2/versions3.6.0~~beta1-1Source reference:
/affected/2/versions3.6.1-1Source reference:
/affected/2/versions3.6.1-2Source reference:
/affected/2/versions3.6.1-3Source reference:
/affected/2/versions - Fixed versions
- 3.6.2-1
Source reference:
/affected/2/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": "0"
},
{
"fixed": "3.0.19-1~deb12u2"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:deb/debian/openssl?arch=source&distro=bookworm",
"ecosystem": "Debian:12"
},
"versions": [
"3.0.10-1",
"3.0.10-1~deb12u1",
"3.0.11-1",
"3.0.11-1~deb12u1",
"3.0.11-1~deb12u2",
"3.0.12-1",
"3.0.12-2",
"3.0.13-1~deb12u1",
"3.0.13-1~deb12u2",
"3.0.14-1~deb12u1",
"3.0.14-1~deb12u2",
"3.0.15-1~deb12u1",
"3.0.16-1~deb12u1",
"3.0.17-1~deb12u1",
"3.0.17-1~deb12u2",
"3.0.17-1~deb12u3",
"3.0.18-1~deb12u1",
"3.0.18-1~deb12u2",
"3.0.19-1~deb12u1",
"3.0.9-1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31790.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.5.5-1~deb13u2"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:deb/debian/openssl?arch=source&distro=trixie",
"ecosystem": "Debian:13"
},
"versions": [
"3.5.1-1",
"3.5.1-1+deb13u1",
"3.5.2-1",
"3.5.3-1",
"3.5.4-1",
"3.5.4-1~deb13u1",
"3.5.4-1~deb13u2",
"3.5.5-1~deb13u1"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31790.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "3.6.2-1"
}
]
}
],
"package": {
"name": "openssl",
"purl": "pkg:deb/debian/openssl?arch=source&distro=forky",
"ecosystem": "Debian:14"
},
"versions": [
"3.5.1-1",
"3.5.2-1",
"3.5.3-1",
"3.5.4-1",
"3.5.4-1~deb13u1",
"3.5.4-1~deb13u2",
"3.5.5-1",
"3.5.5-1~deb13u1",
"3.5.5-1~deb13u2",
"3.5.6-1~deb13u1",
"3.5.6-1~deb13u2",
"3.5.7-1~deb13u1",
"3.5.7-1~deb13u2",
"3.5.7-1~deb13u3",
"3.6.0-1",
"3.6.0-2",
"3.6.0~~alpha1-1",
"3.6.0~~beta1-1",
"3.6.1-1",
"3.6.1-2",
"3.6.1-3"
],
"database_specific": {
"source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-31790.json"
},
"ecosystem_specific": {
"urgency": "not yet assigned"
}
}
]Publisher severity
No explicit severity was provided.
- Event
- #56741 · Revision 1
- Added to Heist Feed
- Publisher date