CVE-2026-31516

HIGH EPSS 1.0%
Published Apr 22, 20262mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Apr 22, 2026 2mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: prevent policy_hthresh.work from racing with netns teardown A XFRM_MSG_NEWSPDINFO request can queue the per-net work item policy_hthresh.work onto the system workqueue. The queued callback, xfrm_hash_rebuild(), retrieves the enclosing struct net via container_of(). If the net namespace is torn down before that work runs, the associated struct net may already have been freed, and xfrm_hash_rebuild() may then dereference stale memory. xfrm_policy_fini() already flushes policy_hash_work during teardown, but it does not synchronize policy_hthresh.work. Synchronize policy_hthresh.work in xfrm_policy_fini() as well, so the queued work cannot outlive the net namespace teardown and access a freed struct net.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
1.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-362

Affected Products 11

VendorProductVersionRange
linuxlinux_kernel*≥3.18.1  –  <6.12.80
linuxlinux_kernel*≥6.13  –  <6.18.21
linuxlinux_kernel*≥6.19  –  <6.19.11
linuxlinux_kernel3.18any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/29fe3a61bcdce398ee3955101c39f89c01a8a77e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4e2e77843fef473ef47e322d52436d8308582a96
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/56ea2257b83ee29a543f158159e3d1abc1e3e4fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8854e9367465d784046362698731c1111e3b39b8
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/29fe3a61bcdce398ee3955101c39f89c01a8a77e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/4e2e77843fef473ef47e322d52436d8308582a96
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/56ea2257b83ee29a543f158159e3d1abc1e3e4fe
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8854e9367465d784046362698731c1111e3b39b8
    Patch