CVE-2023-38430

An issue was discovered in the Linux kernel before 6.3.9. ksmbd does not validate the SMB request protocol ID, leading to an out-of-bounds read.

Published: 2023-07-18 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-38430 is rated Moderate Risk (42.9/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.07%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-38430

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.66% 0.07% -0.60%
2 2025-11-18 0.06% 0.66% +0.60%
3 2025-06-16 — 0.06% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-38430

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.2 [email protected]

Weakness enumeration for CVE-2023-38430

OS Trackers for CVE-2023-38430

vendor priority summary link
debian unimportant CVE-2023-38430 unimportant priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2023-38430
ubuntu medium CVE-2023-38430 medium priority: Ubuntu including 167 source packages (linux, linux-allwinner, …), 1970 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 1512, released 197, not-affected 161, ignored 100. https://ubuntu.com/security/CVE-2023-38430

Affected software / configurations for CVE-2023-38430

Vendor Product Version Raw CPE
linux linux_kernel >= 5.15, < 5.15.145 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 5.16, < 6.1.35 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 6.2, < 6.3.9 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
netapp hci_management_node — cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*
netapp h300s — cpe:2.3:h:netapp:h300s:-:*:*:*:*:*:*:*
netapp h410s — cpe:2.3:h:netapp:h410s:-:*:*:*:*:*:*:*
netapp h500s — cpe:2.3:h:netapp:h500s:-:*:*:*:*:*:*:*
netapp h700s — cpe:2.3:h:netapp:h700s:-:*:*:*:*:*:*:*

References for CVE-2023-38430

cvelogic Threat Intelligence