---
id: CVE-2026-52974
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: tls: fix strparser anchor skb leak on offload RX setup failure

  When tls_set_device_offload_rx() fails at tls_dev_add(), the error path
  calls tls_sw_free_resources…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  net: tls: fix strparser anchor skb leak on offload RX setup failure

  When tls_set_device_offload_rx() fails at tls_dev_add(), the error path
  calls tls_sw_free_resources…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
published: '2026-06-24'
updated: '2026-07-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52974'
references:
  - url: 'https://git.kernel.org/stable/c/0c9f399b37ce22a5ed94cc51f03ed07ac7f38e32'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3c405dfa9619e506e75b8e41f8b29a5b99731877'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/58689498ca3384851145a754dbb1d8ed1cf9fb54'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/688f12aa44511dd57e448eb670075c6302ad1dc1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9c54e76f8d6eb11735918777ef0e0509e089557d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bd07fe6c38b9e44ff3fc02692a53f095c5cc9afc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00684
epssPercentile: 0.50448
ingestedAt: '2026-07-11T13:13:25.134Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

net: tls: fix strparser anchor skb leak on offload RX setup failure

When tls_set_device_offload_rx() fails at tls_dev_add(), the error path
calls tls_sw_free_resources_rx() to clean up the SW context that was
initialized by tls_set_sw_offload(). This function calls
tls_sw_release_resources_rx() (which stops the strparser via
tls_strp_stop()) and tls_sw_free_ctx_rx() (which kfrees the context),
but never frees the anchor skb that was allocated by alloc_skb(0) in
tls_strp_init().

Note that tls_sw_free_resources_rx() is exclusively used for this
"failed to start offload" code path, there's no other caller.

The leak did not exist before commit 84c61fe1a75b ("tls: rx: do not use
the standard strparser"), because the standard strparser doesn't try
to pre-allocate an skb.

The normal close path in tls_sk_proto_close() handles cleanup by calling
tls_sw_strparser_done() (which calls tls_strp_done()) after dropping
the socket lock, because tls_strp_done() does cancel_work_sync() and
the strparser work handler takes the socket lock.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.