What is CVE-2023-1076?

CVE-2023-1076 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10. CVE-2023-1076 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2023-1076?

CVE-2023-1076 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Is there a patch available for CVE-2023-1076?

No patch is currently available for CVE-2023-1076. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2023-1076 actively exploited?

CVE-2023-1076 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2023-1076

Medium

A flaw was found in the Linux Kernel. The tun/tap sockets have their socket UID hardcoded to 0 due to a type confusion in their initialization function. While it will be often correct, as tuntap devices require CAP_NET_ADMIN, it may not always be the case, e.g., a non-root user only having that capability. This would make tun/tap sockets being incorrectly treated in filtering/routing decisions, possibly bypassing network filters.

Package Linux Kernel

Published 2023-03-27

Last modified 2025-02-24

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None

Vector string

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

Weakness type

CWE-791

CVE-2023-1076 is classified as CWE-791

See CWE-791 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2023-1076 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=66b2c338adce580dfce2199591e65e2bab889cff
Patch
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=a096ccca6e503a5c575717ff8a36ace27510ab0a
Patch

Details

CVE ID CVE-2023-1076

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2023-03-27

Modified 2025-02-24

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2023-1076?

CVE-2023-1076 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . CVE-2023-1076 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2023-1076?

CVE-2023-1076 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
Is there a patch available for CVE-2023-1076?

No patch is currently available for CVE-2023-1076. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2023-1076 actively exploited?

No — CVE-2023-1076 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.