CVE-2026-99237

tracing: Hold trace_types_lock when resetting last boot data from readers

CVSS 3.1 7.8 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-99237

Published

In the Linux kernel, the following vulnerability has been resolved: tracing: Hold trace_types_lock when resetting last boot data from readers update_last_data_if_empty() is called from tracing_open() with O_TRUNC, tracing_read_pipe() and tracing_buffers_read() without trace_types_lock. Two readers can both pass the LAST_BOOT test and free module_delta twice, and a module notifier can update module_delta while it is being freed. Take trace_types_lock in those paths and keep the callers that already hold it on an unlocked variant.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-99237

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": [
                        "kernel/trace/trace.c"
                    ],
                    "versions": [
                        {
                            "version": "32dc0042528d385d83bf458e4cf3a49c5110afea",
                            "lessThan": "92b69f6db640dadc0851762ee2e12db99f083cad",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "32dc0042528d385d83bf458e4cf3a49c5110afea",
                            "lessThan": "d6d991afe775ab7fcf89523a2502b7ca3be56ffd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "32dc0042528d385d83bf458e4cf3a49c5110afea",
                            "lessThan": "1f06cfe0b60a878619d1d8efe1cd0f515b7dc2aa",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "32dc0042528d385d83bf458e4cf3a49c5110afea",
                            "lessThan": "5a6bd62f09147b49b31fd19d4eba122cb5f941a1",
                            "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": [
                        "kernel/trace/trace.c"
                    ],
                    "versions": [
                        {
                            "version": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.60",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.14",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3.1",
                            "lessThanOrEqual": "7.3.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.4-rc1",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }

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