All vulnerabilities
CVE-2026-93824

Linux: tls: reject the combination of TLS and sockmap

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.17%Chance of exploitation activity in the next 30 days, higher than 5% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in460e6486617c17dd19abe8f3fc67d9a6fa25f8caFixed versionCVE List
Published24 Sep 2026Updated 3 Oct 2026CVE List

What fixes it

  • 460e6486617c17dd19abe8f3fc67d9a6fa25f8caLinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 12

  • Linuxaffected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca before c4896592744f30ff026f799947c5978bcfd7c8c7CVE List
  • Linuxaffected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca before e26aa709454d48c3b3ef8d3100c8a04e7d9fd94eCVE List
  • Linuxaffected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca before c3d4d537337f69e405a36fa561e7292ee4148bf7CVE List
  • Linuxaffected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca before a08e780b6cc1153cbff8be55de9ec9da809e344fCVE List
  • Linuxaffected: d3b18ad31f93d0b6bae105c679018a1ba7daa9ca before 460e6486617c17dd19abe8f3fc67d9a6fa25f8caCVE List
  • Linuxaffected: 4.20CVE List
  • Linuxunaffected: all versions before 4.20CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2CVE List

References 5