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CVE-2025-48946

14
FAUCET Score

CVE-2025-48946 describes a theoretical design flaw in the HQC post-quantum cryptography algorithm, as implemented in liboqs versions prior to 0.13.0. This flaw leads to numerous malformed ciphertexts sharing an implicit rejection value, potentially impacting key derivation protocols. The vulnerability has a low CVSS score of 3.7 (AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N), indicating network access, high attack complexity, and a low impact on confidentiality. Currently, there is no known concrete attack, active exploitation, or publicly available exploit code, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.13.0CPE matchmatch criteria
cpe:2.3:a:openquantumsafe:liboqs:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

3.7LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.20%
Probability of exploitation in next 30 days
EPSS Percentile
10.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0020 is in the 4th percentile among its peer group of 1,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.3 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 10Fixed in: liboqs

Vendor Advisories (1)

redhatCVE-2025-48946Low

liboqs: liboqs affected by theoretical design flaw in HQC

May 30, 2025

References

durumcrustulum.com / 2024/02/24/how-to-hold-kems
Product
github.com / open-quantum-safe/liboqs/commit/a7d698ca9c9d98990647459253183cbe29c550af
Patch
github.com / open-quantum-safe/liboqs/security/advisories/GHSA-3rxw-4v8q-9gq5
Vendor Advisory
groups.google.com / a/list.nist.gov/g/pqc-forum/c/Wiu4ZQo3fP80
Issue TrackingMailing List