ksmbd: validate command request size
Priority LOW 39Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.00328 26th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.15.127, 6.1.46, 6.4 +2
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.15.121 to before 5.15.127; 6.1.36 to before 6.1.46; 6.3.10 to before 6.4 | 5.15.127, 6.1.46, 6.4 | Patch available | CNA |
| Linux | Linux | 6.4 and later | 5.15.127, 6.1.46, 6.4.11, 6.5 | Patch available | CNA |
- Linux VendorLinux Affected 5.15.121 to before 5.15.127; 6.1.36 to before 6.1.46; 6.3.10 to before 6.4 Fixed in 5.15.127, 6.1.46, 6.4 Patch available CNA
- Linux VendorLinux Affected 6.4 and later Fixed in 5.15.127, 6.1.46, 6.4.11, 6.5 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.15.121 to before 5.15.127; 6.1.36 to before 6.1.46; 6.3.10 to before 6.4; 6.4.1 to before 6.4.11 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:* | 6.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* | 6.5 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* | 6.5 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* | 6.5 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* | 6.5 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* | 6.5 rc5 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.15.121 to before 5.15.127; 6.1.36 to before 6.1.46; 6.3.10 to before 6.4; 6.4.1 to before 6.4.11 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:* Versions 6.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:* Versions 6.5 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:* Versions 6.5 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:* Versions 6.5 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:* Versions 6.5 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:* Versions 6.5 rc5 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.15.127, 6.1.46, 6.4
- Fix · CNA Linux (Linux) Fixed in 5.15.127, 6.1.46, 6.4.11, 6.5
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2023-4515
- 2026-10-03 Alias added: GHSA-j2x9-qg6q-8wg7
- 2026-11-07 Affected versions changed · Red Hat
References
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2023-4515 · CVE Program
- CVE-2023-4515 · NVD
- FIRST EPSS
- GHSA-j2x9-qg6q-8wg7 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-4515 · Red Hat security data · CC BY 4.0
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