What is CVE-2023-31248?

CVE-2023-31248 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), affecting Linux kernel versions from v5.9-rc1 onward. CVE-2023-31248 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-31248?

CVE-2023-31248 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-2023-31248?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-31248 patch availability.

Is CVE-2023-31248 actively exploited?

CVE-2023-31248 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-2023-31248

High

Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace

Package Linux Kernel

Published 2023-07-05

Last modified 2024-11-21

CVSS version 3.1

Patch available

Not yet patched

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-2023-31248 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

Affected versions

Linux kernel versions v5.9-rc1 and later are affected. No fixed version recorded yet.

Affected from

≥ v5.9-rc1

References

10 total

Kernel.org
https://lore.kernel.org/netfilter-devel/[email protected]/T/

Patch
Packet Storm
http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html

Third Party Advisory VDB Entry
Packet Storm
http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html

Third Party Advisory VDB Entry
Openwall
http://www.openwall.com/lists/oss-security/2023/07/05/2

Mailing List Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2023/08/msg00001.html

Third Party Advisory VDB Entry

Showing 5 of 10 references View all on NVD

Details

CVE ID CVE-2023-31248

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2023-07-05

Modified 2024-11-21

KEV No

Patch

Not yet patched

Package linux

Frequently asked questions

What is CVE-2023-31248?

CVE-2023-31248 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) . It affects Linux kernel versions from v5.9-rc1 onward . CVE-2023-31248 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-31248?

CVE-2023-31248 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-2023-31248?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2023-31248 patch availability.
Is CVE-2023-31248 actively exploited?

No. CVE-2023-31248 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.