Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2025-21851

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
12/03/2025
Last modified:
01/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> bpf: Fix softlockup in arena_map_free on 64k page kernel<br /> <br /> On an aarch64 kernel with CONFIG_PAGE_SIZE_64KB=y,<br /> arena_htab tests cause a segmentation fault and soft lockup.<br /> The same failure is not observed with 4k pages on aarch64.<br /> <br /> It turns out arena_map_free() is calling<br /> apply_to_existing_page_range() with the address returned by<br /> bpf_arena_get_kern_vm_start(). If this address is not page-aligned<br /> the code ends up calling apply_to_pte_range() with that unaligned<br /> address causing soft lockup.<br /> <br /> Fix it by round up GUARD_SZ to PAGE_SIZE

Impact

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

Base Score: 3.30 LOW
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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): Low

Base Score 3.x
3.30
Severity 3.x
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.9 (including) 6.12.17 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.13.5 (excluding)
cpe:2.3:o:linux:linux_kernel:6.9:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.14:rc3:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools