Use after free in Kernel
Priority LOW 39CWE-416Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
A flaw was found in the fixed buffer registration code for io_uring (io_sqe_buffer_register in io_uring/rsrc.c) in the Linux kernel that allows out-of-bounds access to physical memory beyond the end of the buffer. This flaw enables full local privilege escalation.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01371 72nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Kernel | Kernel prior to 6.4-rc1 | — | No fix listed | CNA |
- Kernel Vendor— Affected Kernel prior to 6.4-rc1 Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.3 to before 6.3.2 | Vulnerable | Linux |
| cpe:2.3:a:netapp:hci_baseboard_management_controller:h300s:*:*:*:*:*:*:* | h300s | Vulnerable | NetApp |
| cpe:2.3:a:netapp:hci_baseboard_management_controller:h410c:*:*:*:*:*:*:* | h410c | Vulnerable | NetApp |
| cpe:2.3:a:netapp:hci_baseboard_management_controller:h410s:*:*:*:*:*:*:* | h410s | Vulnerable | NetApp |
| cpe:2.3:a:netapp:hci_baseboard_management_controller:h500s:*:*:*:*:*:*:* | h500s | Vulnerable | NetApp |
| cpe:2.3:a:netapp:hci_baseboard_management_controller:h700s:*:*:*:*:*:*:* | h700s | Vulnerable | NetApp |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 6.3 to before 6.3.2 Vulnerable ·Linux
- cpe:2.3:a:netapp:hci_baseboard_management_controller:h300s:*:*:*:*:*:*:* Versions h300s Vulnerable ·NetApp
- cpe:2.3:a:netapp:hci_baseboard_management_controller:h410c:*:*:*:*:*:*:* Versions h410c Vulnerable ·NetApp
- cpe:2.3:a:netapp:hci_baseboard_management_controller:h410s:*:*:*:*:*:*:* Versions h410s Vulnerable ·NetApp
- cpe:2.3:a:netapp:hci_baseboard_management_controller:h500s:*:*:*:*:*:*:* Versions h500s Vulnerable ·NetApp
- cpe:2.3:a:netapp:hci_baseboard_management_controller:h700s:*:*:*:*:*:*:* Versions h700s Vulnerable ·NetApp
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 4 products
- 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-2023-2598
- 2026-10-03 Alias added: GHSA-mmvq-3rp7-6cw4
References
Sources
- CVE-2023-2598 · CVE Program
- CVE-2023-2598 · NVD
- FIRST EPSS
- GHSA-mmvq-3rp7-6cw4 · GitHub Advisory Database · CC BY 4.0
- CVE-2023-2598 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences