OESA-2026-2161

See a problem?
Please try reporting it to the source first.
Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-2161
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-2161.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-2161
Upstream
Published
2026-05-03T11:11:09Z
Modified
2026-08-18T01:19:50Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
edk2 security update
Details

EDK II is a modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications.

Security Fix(es):

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.(CVE-2026-31790)

Database specific 
{
    "severity": "High"
}
References

Affected packages

openEuler:24.03-LTS-SP3 / edk2

Package

Name
edk2
Purl
pkg:rpm/openEuler/edk2&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
202308-37.oe2403sp3

Ecosystem specific 

{
    "aarch64": [
        "edk2-debuginfo-202308-37.oe2403sp3.aarch64.rpm",
        "edk2-debugsource-202308-37.oe2403sp3.aarch64.rpm",
        "edk2-devel-202308-37.oe2403sp3.aarch64.rpm"
    ],
    "noarch": [
        "edk2-aarch64-202308-37.oe2403sp3.noarch.rpm",
        "edk2-help-202308-37.oe2403sp3.noarch.rpm",
        "edk2-ovmf-202308-37.oe2403sp3.noarch.rpm",
        "python3-edk2-devel-202308-37.oe2403sp3.noarch.rpm"
    ],
    "src": [
        "edk2-202308-37.oe2403sp3.src.rpm"
    ],
    "x86_64": [
        "edk2-debuginfo-202308-37.oe2403sp3.x86_64.rpm",
        "edk2-debugsource-202308-37.oe2403sp3.x86_64.rpm",
        "edk2-devel-202308-37.oe2403sp3.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2161.json"