Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

Go to Calendar     Go to Press Room     Go to Newsletters subscription

Search

CVE-2026-43093

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
06/05/2026
Last modified:
19/05/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> xsk: tighten UMEM headroom validation to account for tailroom and min frame<br /> <br /> The current headroom validation in xdp_umem_reg() could leave us with<br /> insufficient space dedicated to even receive minimum-sized ethernet<br /> frame. Furthermore if multi-buffer would come to play then<br /> skb_shared_info stored at the end of XSK frame would be corrupted.<br /> <br /> HW typically works with 128-aligned sizes so let us provide this value<br /> as bare minimum.<br /> <br /> Multi-buffer setting is known later in the configuration process so<br /> besides accounting for 128 bytes, let us also take care of tailroom space<br /> upfront.

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:*:*:*:*:*:*:*:* 4.19.118 (including) 4.20 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.4.35 (including) 5.5 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.6.7 (including) 5.7 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.7.1 (including) 6.6.136 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.83 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.24 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.14 (excluding)
cpe:2.3:o:linux:linux_kernel:5.7:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.7:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.7:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.7:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.7:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.7:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.7:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools