What’s Vulnerable › Vulnerabilities

CVE-2023-38429

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-07-18 · updated 2026-06-17
• Weakness: CWE-193

Description

An issue was discovered in the Linux kernel before 6.3.4. fs/ksmbd/connection.c in ksmbd has an off-by-one error in memory allocation (because of ksmbd_smb2_check_message) that may lead to out-of-bounds access.

Affected products

• Linux kernel: from 5.15 before 5.15.113; from 5.16 before 6.1.30; from 6.2 before 6.3.4 — fixed in 5.15.113, 6.1.30, 6.3.4

How to fix

Upgrade to a fixed version: Linux kernel 5.15.113, 6.1.30, 6.3.4. Check the vendor advisory for mitigations.

References

• https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.4
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/ksmbd?id=443d61d1fa9faa60ef925513d83742902390100f
• https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.4
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/ksmbd?id=443d61d1fa9faa60ef925513d83742902390100f
• https://security.netapp.com/advisory/ntap-20250103-0009/

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