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

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CVE-2026-45951

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
27/05/2026
Last modified:
16/06/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bpf: Fix a potential use-after-free of BTF object<br /> <br /> Refcounting in the check_pseudo_btf_id() function is incorrect:<br /> the __check_pseudo_btf_id() function might get called with a zero<br /> refcounted btf. Fix this, and patch related code accordingly.<br /> <br /> v3: rephrase a comment (AI)<br /> v2: fix a refcount leak introduced in v1 (AI)

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:*:*:*:*:*:*:*:* 6.14 (including) 6.18.14 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.4 (excluding)

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


References to Advisories, Solutions, and Tools