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CVE-2023-2236 Details

Description

A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Both io_install_fixed_file and its callers call fput in a file in case of an error, causing a reference underflow which leads to a use-after-free vulnerability. We recommend upgrading past commit 9d94c04c0db024922e886c9fd429659f22f48ea4.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:7.8 HIGHVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d94c04c0db024922e886c9fd429659f22f48ea4	CVE	ExploitMailing ListPatch
https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4	CVE	ExploitPatch
https://security.netapp.com/advisory/ntap-20230601-0010/	CVE	Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d94c04c0db024922e886c9fd429659f22f48ea4	[email protected]	ExploitMailing ListPatch
https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4	[email protected]	ExploitPatch
https://security.netapp.com/advisory/ntap-20230601-0010/	[email protected]	Vendor Advisory

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-416	Use After Free	[email protected]
CWE-416	Use After Free	[email protected]

Affected Products

Product	Versions
linux linux kernel	>= 5.19, < 6.0.11
CPE cpe:2.3:o:linux:linux_kernel:::::::: Remediation No remediation found in references.
netapp hci baseboard management controller	h300s h410c h410s h500s h700s
CPE cpe:2.3:a:netapp:hci_baseboard_management_controller:h300s:::::::* cpe:2.3:a:netapp:hci_baseboard_management_controller:h410c:::::::* cpe:2.3:a:netapp:hci_baseboard_management_controller:h410s:::::::* cpe:2.3:a:netapp:hci_baseboard_management_controller:h500s:::::::* cpe:2.3:a:netapp:hci_baseboard_management_controller:h700s:::::::* Remediation No remediation found in references.

Change History

8 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Feb 13, 2025	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Aug 11, 2023	Modified Analysis	[email protected]
Jun 1, 2023	CVE Modified	[email protected]
May 6, 2023	Initial Analysis	[email protected]