CVE-2023-5992: Red Hat Enterprise Linux 8 · Observable Discrepancy
Affects Red Hat Enterprise Linux 8Source CVE Database V5
Not known to be exploited · CVSS 5.6 Medium.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 1.1% chance of exploitation in 30 days – higher than 66% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:LExploitation evidence
Disclosed: evidence found.
CVE published 31 Jan 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
- Apply official patches and updates from Red Hat and OpenSC maintainers as soon as they become available to address the side-channel vulnerability.
- Restrict network and local access to cryptographic services and OpenSC components to trusted users and systems only, minimizing exposure to potential attackers.
- Implement monitoring and anomaly detection for unusual cryptographic operation patterns or timing discrepancies that could indicate side-channel attack attempts.
- Use hardware security modules (HSMs) or cryptographic accelerators that provide built-in side-channel resistance where feasible.
- Conduct regular security audits and code reviews of cryptographic implementations to ensure adherence to side-channel resistant coding practices.
- Educate security teams about side-channel risks and incorporate side-channel attack scenarios into incident response planning.
- Consider deploying additional layers of encryption or multi-factor authentication to reduce the impact of potential key leakage.
- Limit the use of vulnerable cryptographic libraries in sensitive environments until fully patched and verified.
Description
A vulnerability was found in OpenSC where PKCS#1 encryption padding removal is not implemented as side-channel resistant. This issue may result in the potential leak of private data.
References
- access.redhat.com/errata/RHSA-2024:0966 (opens in a new tab)
- access.redhat.com/errata/RHSA-2024:0967 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2023-5992 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2248685 (opens in a new tab)
- github.com/OpenSC/OpenSC/wiki/CVE-2023-5992 (opens in a new tab)
- usenix.org/system/files/usenixsecurity24-shagam.pdf (opens in a new tab)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OWIZ5ZLO5ECYPLSTESCF7I7PQO5X6ZSU/ (opens in a new tab)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RJI2FWLY24EOPALQ43YPQEZMEP3APPPI/ (opens in a new tab)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UECKC7X4IM4YZQ5KRQMNBNKNOXLZC7RZ/ (opens in a new tab)
- lists.debian.org/debian-lts-announce/2024/12/msg00026.html (opens in a new tab)