CVE-2023-32255
Kernel: memory leak via ksmbd session setup request with unknown ntlmssp message type
At a glance
- Severity
- MEDIUM 5.3
- EPSS
- EPSS 0.51 % · percentile 44 (2026-10-27)
- State
- PUBLISHED
- Published
- Updated
- Assigner
- redhat
- NVD status
- Deferred
Description
A flaw was found in the Linux kernel's ksmbd component. A memory leak can occur if a client sends a session setup request with an unknown NTLMSSP message type, potentially leading to resource exhaustion.
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | redhat |
| CVSS 3.1 | MEDIUM 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | NVD · secalert@redhat.com (Secondary) |
Weaknesses (CWE)
European references
- ENISA EUVD · EUVD-2023-36512
- GCVE · GCVE-0-2023-32255
Affected products
| Product | Versions |
|---|---|
| linux | affected 0 < 5.15.111 ; affected 6.0.0 < 6.0.* ; affected 6.1.0 < 6.1.28 ; affected 6.2.0 < 6.2.15 ; affected 6.3.0 < 6.3.2 |
| Red Hat · Red Hat Enterprise Linux 10 | |
| Red Hat · Red Hat Enterprise Linux 6 | |
| Red Hat · Red Hat Enterprise Linux 7 | |
| Red Hat · Red Hat Enterprise Linux 7 | |
| Red Hat · Red Hat Enterprise Linux 8 | |
| Red Hat · Red Hat Enterprise Linux 8 | |
| Red Hat · Red Hat Enterprise Linux 9 | |
| Red Hat · Red Hat Enterprise Linux 9 |
References
- https://access.redhat.com/security/cve/CVE-2023-32255
- https://bugzilla.redhat.com/show_bug.cgi?id=2385884
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6d7cb549c2ca20e1f07593f15e936fd54b763028
- https://www.zerodayinitiative.com/advisories/ZDI-23-703/
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |