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CVE-2026-53032

Severity CVSS v4.0:
Pending analysis
Type:
CWE-476 NULL Pointer Dereference
Publication date:
24/06/2026
Last modified:
14/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bpf: Fix NULL deref in map_kptr_match_type for scalar regs<br /> <br /> Commit ab6c637ad027 ("bpf: Fix a bpf_kptr_xchg() issue with local<br /> kptr") refactored map_kptr_match_type() to branch on btf_is_kernel()<br /> before checking base_type(). A scalar register stored into a kptr<br /> slot has no btf, so the btf_is_kernel(reg-&gt;btf) call dereferences<br /> NULL.<br /> <br /> Move the base_type() != PTR_TO_BTF_ID guard before any reg-&gt;btf<br /> access.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

Base Score 3.x
5.50
Severity 3.x
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.4.16 (including) 6.5 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.5.3 (including) 6.6.141 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.7 (including) 6.12.91 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.33 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 7.0.10 (excluding)

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


References to Advisories, Solutions, and Tools