CVE-2025-39965

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

13/10/2025

Last modified:

03/02/2026

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: xfrm_alloc_spi shouldn&#39;t use 0 as SPI x->id.spi == 0 means "no SPI assigned", but since commit 94f39804d891 ("xfrm: Duplicate SPI Handling"), we now create states and add them to the byspi list with this value. __xfrm_state_delete doesn&#39;t remove those states from the byspi list, since they shouldn&#39;t be there, and this shows up as a UAF the next time we go through the byspi list.

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::::::::	6.6.103 (including)	6.6.109 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.12.43 (including)	6.12.50 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.15.11 (including)	6.16 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	6.16.2 (including)	6.16.10 (excluding)
cpe:2.3:o:linux:linux_kernel:6.17:rc1::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc2::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc3::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc4::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc5::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc6::::::
cpe:2.3:o:linux:linux_kernel:6.17:rc7::::::

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

CVE-2025-39965

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools