CVE-2023-2236

See a problem?
Please try reporting it to the source first.

Source

https://cve.org/CVERecord?id=CVE-2023-2236

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-2236.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2023-2236

Downstream

DEBIAN-CVE-2023-2236

UBUNTU-CVE-2023-2236

Published

2023-05-01T12:50:47.742Z

Modified

2026-07-08T07:34:17.285395039Z

Severity

7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

Use-after-free in Linux kernel's Performance Events subsystem

Details

A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation.

Both ioinstallfixed_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.

Database specific

{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/2xxx/CVE-2023-2236.json",
    "cna_assigner": "Google",
    "cwe_ids": [
        "CWE-416"
    ]
}

References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

Affected ranges

Type

GIT

Repo

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

Events

Introduced

3d7cb6b04c3f3115719235cc6866b10326de34cd

Fixed

830b3c68c1fb1e9176028d02ef86f3cf76aa2476

Database specific

{
    "extracted_events": [
        {
            "introduced": "5.19"
        },
        {
            "fixed": "6.1"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v5.*

v5.19

v6.*

v6.0

v6.0-rc1

v6.0-rc2

v6.0-rc3

v6.0-rc4

v6.0-rc5

v6.0-rc6

v6.0-rc7

v6.1-rc1

v6.1-rc2

v6.1-rc3

v6.1-rc4

v6.1-rc5

v6.1-rc6

v6.1-rc7

v6.1-rc8

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-2236.json"