CVE-2023-6536
Kernel: null pointer dereference in __nvmet_req_complete
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A flaw was found in the Linux kernel's NVMe driver. This issue may allow an unauthenticated malicious actor to send a set of crafted TCP packages when using NVMe over TCP, leading the NVMe driver to a NULL pointer dereference in the NVMe driver, causing kernel panic and a denial of service.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.5% · top 25% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:4.18.0-513.18.1.rt7.320.el8_9 – < *
Red Hat · Red Hat Enterprise Linux 8
- unaffected 0:4.18.0-513.18.1.el8_9 – < *
Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support
- unaffected 0:4.18.0-372.91.1.el8_6 – < *
Red Hat · Red Hat Enterprise Linux 8.8 Extended Update Support
- unaffected 0:4.18.0-477.58.1.el8_8 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:5.14.0-362.24.1.el9_3 – < *
Red Hat · Red Hat Enterprise Linux 9
- unaffected 0:5.14.0-362.24.1.el9_3 – < *
Red Hat · Red Hat Enterprise Linux 9.2 Extended Update Support
- unaffected 0:5.14.0-284.52.1.el9_2 – < *
Red Hat · Red Hat Enterprise Linux 9.2 Extended Update Support
- unaffected 0:5.14.0-284.52.1.rt14.337.el9_2 – < *
Red Hat · Red Hat Virtualization 4 for Red Hat Enterprise Linux 8
- unaffected 0:4.18.0-372.91.1.el8_6 – < *
- unaffected v5.8.6-22 – < *
- unaffected v5.8.6-11 – < *
- unaffected v6.8.1-407 – < *
- unaffected v5.8.6-19 – < *
- unaffected v1.0.0-479 – < *
- unaffected v5.8.6-7 – < *
- unaffected v0.4.0-247 – < *
- unaffected v5.8.6-5 – < *
- unaffected v1.1.0-227 – < *
- unaffected v5.8.1-470 – < *
- unaffected v2.9.6-14 – < *
- unaffected v5.8.6-2 – < *
- unaffected v5.8.6-24 – < *
- unaffected v5.8.6-10 – < *
- unaffected v0.1.0-525 – < *
- unaffected v0.1.0-224 – < *
- unaffected v0.28.1-56 – < *
Red Hat · Red Hat Enterprise Linux 6
All versions: unaffected
Red Hat · Red Hat Enterprise Linux 7
All versions: unaffected
Red Hat · Red Hat Enterprise Linux 7
All versions: unaffected
Red Hat · Red Hat Enterprise Linux 9
All versions: affected
What to do
Workaround: To mitigate this issue, prevent module nvmet-tcp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.
References (13)
- RHSA-2024:0723 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0724 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0725 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0881 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:0897 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:1248 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:2094 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2024:3810 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://access.redhat.com/security/cve/CVE-2023-6536 (opens in a new tab)vdb-entryx_refsource_REDHATx_transferred
- RHBZ#2254052 (opens in a new tab)issue-trackingx_refsource_REDHATx_transferred
- https://lists.debian.org/debian-lts-announce/2024/06/msg00016.html (opens in a new tab)x_transferred
- https://security.netapp.com/advisory/ntap-20240415-0001/ (opens in a new tab)x_transferred
- https://lists.fedoraproject.org/archives/list/[email protected]/message/ZFYW6R64GPLUOXSQBJI3JBUX3HGLAYPP/ (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2023-6536)Record last updated .