CVE-2026-23083

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

04/02/2026

Last modified:

18/03/2026

Description

In the Linux kernel, the following vulnerability has been resolved: fou: Don&#39;t allow 0 for FOU_ATTR_IPPROTO. fou_udp_recv() has the same problem mentioned in the previous patch. If FOU_ATTR_IPPROTO is set to 0, skb is not freed by fou_udp_recv() nor "resubmit"-ted in ip_protocol_deliver_rcu(). Let&#39;s forbid 0 for FOU_ATTR_IPPROTO.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	3.18 (including)	5.10.249 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.15.199 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.16 (including)	6.1.162 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.2 (including)	6.6.122 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.7 (including)	6.12.68 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.13 (including)	6.18.8 (excluding)
cpe:2.3:o:linux:linux_kernel:6.19:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.19:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.19:rc3::::::
cpe:2.3:o:linux:linux_kernel:6.19:rc4::::::
cpe:2.3:o:linux:linux_kernel:6.19:rc5::::::
cpe:2.3:o:linux:linux_kernel:6.19:rc6::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-23083

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools