CVE-2026-93824

tls: reject the combination of TLS and sockmap

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-93824

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-93824

Published

Linux

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/tls/tls_main.c"
                    ],
                    "versions": [
                        {
                            "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
                            "lessThan": "c4896592744f30ff026f799947c5978bcfd7c8c7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
                            "lessThan": "e26aa709454d48c3b3ef8d3100c8a04e7d9fd94e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
                            "lessThan": "c3d4d537337f69e405a36fa561e7292ee4148bf7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
                            "lessThan": "a08e780b6cc1153cbff8be55de9ec9da809e344f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
                            "lessThan": "460e6486617c17dd19abe8f3fc67d9a6fa25f8ca",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                }

Linux

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/tls/tls_main.c"
                    ],
                    "versions": [
                        {
                            "version": "4.20",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.20",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.111",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.53",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON