CVE-2023-4515ksmbd: validate command request size
- 9.1CriticalCVSS base score
- 0.33%Exploitation in 30 daysEPSS · top 74% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: validate command request size In commit 2b9b8f3b68ed ("ksmbd: validate command payload size"), except for SMB2_OPLOCK_BREAK_HE command, the request size of other commands is not checked, it's not expected. Fix it by add check for request size of other commands.
Timeline
ID reserved
By Linux
- 24 months later
· 24 months later
Published
- 12 months later
· 12 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.33% · top 74% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Affected products
- affected 35f450f54dca1519bb24faacd0428db09f89a11f – < 595679098bdcdbfbba91ebe07a2f7f208df93870
- affected 9650cf70ec9d94ff34daa088b643229231723c26 – < c6bef3bc30fd4a175aef846b7d928a6c40d091cd
- affected 2b9b8f3b68edb3d67d79962f02e26dbb5ae3808d – < ff7236b66d69582f90cf5616e63cfc3dc18142bb
- affected 2b9b8f3b68edb3d67d79962f02e26dbb5ae3808d – < 5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3c
- affected 768caf4019f0391c0b6452afe34cea1704133f7b
- affected 5.15.121 – < 5.15.127
- affected 6.1.36 – < 6.1.46
- affected 6.3.10 – < 6.4
- affected 6.4
- unaffected < 6.4
- unaffected 5.15.127 – ≤ 5.15.*
- unaffected 6.1.46 – ≤ 6.1.*
- unaffected 6.4.11 – ≤ 6.4.*
- unaffected 6.5 – ≤ *
References
References4
- https://git.kernel.org/stable/c/595679098bdcdbfbba91ebe07a2f7f208df93870 (opens in a new tab)
- https://git.kernel.org/stable/c/c6bef3bc30fd4a175aef846b7d928a6c40d091cd (opens in a new tab)
- https://git.kernel.org/stable/c/ff7236b66d69582f90cf5616e63cfc3dc18142bb (opens in a new tab)
- https://git.kernel.org/stable/c/5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3c (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)
- EUVD EUVD-2023-54370 (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://cveledger.app/cve/CVE-2023-4515)Record last updated .