CVE-2023-5871
Libnbd: malicious nbd server may crash libnbd
02 Description
Libnbd: malicious nbd server may crash libnbd
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.92% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 60.0% of scored records. A rank, not a probability.
- NVD base score
- 5.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-11-27 11:58Z2 YR AGO
- Last updated
- 2025-11-20 18:07Z11 MO AGO
- Reserved
- 2023-10-31
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.3)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-617Reachable AssertionBase
- Data version
- 5.2
- Document digest
- 3658e5805523e43e7af4cdf8a26a81f9cf59149ea86ccfeab539659ad7ecdc57
05 Affected products
06 References
- access.redhat.comRHSA-2024:2204https://access.redhat.com/errata/RHSA-2024:2204
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-5871
- bugzilla.redhat.comRHBZ#2247308https://bugzilla.redhat.com/show_bug.cgi?id=2247308
- lists.libguestfs.orghttps://lists.libguestfs.org/archives/list/guestfs@lists.libguestfs.org/thread/PFVUCMPFQUDC23JXSCUUPXIGDZ7XCFMD/
07 Fixed in
AlmaLinux 9
- libnbd Fixed in 1.18.1-3.el9
- libnbd-bash-completion Fixed in 1.18.1-3.el9
- libnbd-devel Fixed in 1.18.1-3.el9
- nbdfuse Fixed in 1.18.1-3.el9
- ocaml-libnbd Fixed in 1.18.1-3.el9
- ocaml-libnbd-devel Fixed in 1.18.1-3.el9
- python3-libnbd Fixed in 1.18.1-3.el9
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- libnbd Fixed in 1.18.1-3.el9
- libnbd-bash-completion Fixed in 1.18.1-3.el9
- libnbd-devel Fixed in 1.18.1-3.el9
- nbdfuse Fixed in 1.18.1-3.el9
- ocaml-libnbd Fixed in 1.18.1-3.el9
- ocaml-libnbd-devel Fixed in 1.18.1-3.el9
- python3-libnbd Fixed in 1.18.1-3.el9
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libnbd Fixed in 1.18.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libnbd Fixed in 1.18.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- libnbd No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- libnbd No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- libnbd No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.