What is CVE-2025-39965?

CVE-2025-39965 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-10-13.

How severe is CVE-2025-39965?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2025-39965 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Linux

CVE-2025-39965

In the Linux kernel, the following vulnerability has been resolved: xfrm: xfrm_alloc_spi shouldn'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 …

EPSS: 0.002 (7.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Linux — versions 6.16.2, 29e9158f91f99057dbd35db5e8674d93b38549fe, 6.6.103
Linux Linux_kernel — versions 6.17

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

Frequently asked questions

What is CVE-2025-39965?: CVE-2025-39965 is a medium-severity vulnerability in Linux. CVSS score: 5.5/10. Published 2025-10-13.
How severe is CVE-2025-39965?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2025-39965 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.