---
id: CVE-2026-93824
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tls: reject the combination of TLS and sockmap

  TLS and sockmap (BPF psock) integration hides a lot of latent bugs.
  Bugs which may be more or less relevant for real use…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  tls: reject the combination of TLS and sockmap

  TLS and sockmap (BPF psock) integration hides a lot of latent bugs.
  Bugs which may be more or less relevant for real use…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    c3d4d537337f69e405a36fa561e7292ee4148bf7
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    a08e780b6cc1153cbff8be55de9ec9da809e344f
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    460e6486617c17dd19abe8f3fc67d9a6fa25f8ca
  - Linux < 6.12.111
  - Linux < 6.18.53
  - Linux (all versions)
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:17:23.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93824'
references:
  - url: 'https://git.kernel.org/stable/c/460e6486617c17dd19abe8f3fc67d9a6fa25f8ca'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a08e780b6cc1153cbff8be55de9ec9da809e344f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c3d4d537337f69e405a36fa561e7292ee4148bf7'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.890Z'
---

## Overview

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

tls: reject the combination of TLS and sockmap

TLS and sockmap (BPF psock) integration hides a lot of latent bugs.
Bugs which may be more or less relevant for real users but they
are definitely exploitable.

We could not find anyone actively using this integration so let's
reject this config. Adding a TLS socket to a sockmap was already
rejected by sk_psock_init() through the inet_csk_has_ulp() check.
We need to reject the attempts to configure the TLS keys (rather
than adding the ULP itself) because checking prior to the ULP
installation is tricky without risking a race with sockmap getting
added in parallel (sockmap does not hold the socket lock).

This patch is a minimal rejection of the feature. Subsequent patch
in the series will do a light dead code removal. Full cleanup would
require a major rewrite of the Tx path, we don't need skmsg any more.

## Remediation

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