CVEvulnerability

CVE-2025-39965

5.5 MEDIUM Published 2025-10-13 Modified 2026-10-19 Official page ↗
Status
Modified
Published
2025-10-13
Last modified
2026-10-19
Assigner
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

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 and add them to the byspi list with this value. __xfrm_state_delete doesn't remove those states from the byspi list, since they shouldn't be there, and this shows up as a UAF the next time we go through the byspi list.

Affected configurations

• linux linux kernel (>= 6.6.103 < 6.6.109) • linux linux kernel (>= 6.12.43 < 6.12.50) • linux linux kernel (>= 6.15.11 < 6.16) • linux linux kernel (>= 6.16.2 < 6.16.10) • linux linux kernel 6.17

References