What is CVE-2023-52483?

CVE-2023-52483 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Use After Free flaw (CWE-416). CVE-2023-52483 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-52483?

CVE-2023-52483 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2023-52483?

No patch is currently available for CVE-2023-52483. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-52483 actively exploited?

CVE-2023-52483 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/416.html

CVE-2023-52483

High

In the Linux kernel, the following vulnerability has been resolved: mctp: perform route lookups under a RCU read-side lock Our current route lookups (mctp_route_lookup and mctp_route_lookup_null) traverse the net's route list without the RCU read lock held. This means the route lookup is subject to preemption, resulting in an potential grace period expiry, and so an eventual kfree() while we still have the route pointer. Add the proper read-side critical section locks around the route lookups, preventing premption and a possible parallel kfree. The remaining net->mctp.routes accesses are already under a rcu_read_lock, or protected by the RTNL for updates. Based on an analysis from Sili Luo <[email protected]>, where introducing a delay in the route lookup could cause a UAF on simultaneous sendmsg() and route deletion.

Package Linux Kernel

Published 2024-02-29

Last modified 2025-01-13

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-416

CVE-2023-52483 is a Use After Free vulnerability

What is Use After Free?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2023-52483 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/1db0724a01b558feb1ecae551782add1951a114a
Patch
Kernel patch commit
https://git.kernel.org/stable/c/2405f64a95a7a094eb24cba9bcfaffd1ea264de4
Patch
Kernel patch commit
https://git.kernel.org/stable/c/5093bbfc10ab6636b32728e35813cbd79feb063c
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2023-52483

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2024-02-29

Modified 2025-01-13

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-52483?

CVE-2023-52483 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Use After Free flaw (CWE-416) . CVE-2023-52483 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-52483?

CVE-2023-52483 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2023-52483?

No patch is currently available for CVE-2023-52483. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-52483 actively exploited?

No — CVE-2023-52483 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Use After Free (CWE-416)?

The product references memory after it has been freed, which may cause it to crash, use unexpected values, or execute code. View CWE-416 on MITRE CWE →