{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-97923",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:18:58.202Z",
        "datePublished": "2026-09-25T10:22:42.300Z",
        "dateUpdated": "2026-10-19T09:10:50.106Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:10:50.106Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Free histogram the var ref when its initialization fails\n\ncreate_var_ref() allocates a VAR_REF hist_field and then calls\ninit_var_ref() to fill it in. When that fails the field is leaked.\n\ncommit 656fe2ba85e8 (\"tracing: Use hist trigger's var_ref array to destroy\nvar_refs\") made destroy_hist_field() return early for\nHIST_FIELD_FL_VAR_REF, since var refs are freed by walking the trigger's\nvar_refs[] array instead. create_var_ref() adds the field to that array\nonly after init_var_ref() has succeeded, so on this path the field is in\nneither place and nothing frees it. The call was correct when it was\nwritten, before var refs were taken out of destroy_hist_field().\n\ninit_var_ref() cannot free it either. The caller owns the field, so\ninit_var_ref() undoes only its own string allocations and leaves the\nfield alone. Freeing it there would leave create_var_ref() passing freed\nmemory to destroy_hist_field(), which reads its flags.\n\nCall __destroy_hist_field(), which frees the field without consulting\nthe flag."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/trace/trace_events_hist.c"
                    ],
                    "versions": [
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                            "version": "656fe2ba85e81d00e4447bf77b8da2be3c47acb2",
                            "lessThan": "608b7751926ec08fae6a1ac4e7308195da68c362",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "656fe2ba85e81d00e4447bf77b8da2be3c47acb2",
                            "lessThan": "4870f9071c9ea3c1423a07741b85a794db30d672",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "656fe2ba85e81d00e4447bf77b8da2be3c47acb2",
                            "lessThan": "352f84a381e7b4651b30366e93cb858f3fa9c91a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "656fe2ba85e81d00e4447bf77b8da2be3c47acb2",
                            "lessThan": "4924328d6991f25b65bb7c8ff5d56c2a9b254851",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "656fe2ba85e81d00e4447bf77b8da2be3c47acb2",
                            "lessThan": "74375caa20fe5165807b4334c783d1790b01f02a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "656fe2ba85e81d00e4447bf77b8da2be3c47acb2",
                            "lessThan": "222abcbe7866fef04563b6eb89fb21f627dcbc77",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "656fe2ba85e81d00e4447bf77b8da2be3c47acb2",
                            "lessThan": "a69baeac38677270656e85753d93856a076dee57",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "656fe2ba85e81d00e4447bf77b8da2be3c47acb2",
                            "lessThan": "516001d53e6b2ea95a251ee2ef54a1a689a3fd58",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "836717841a30d7845cdf9cb806ee0ff3bfa7135a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4.19.100",
                            "lessThan": "4.20",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/trace/trace_events_hist.c"
                    ],
                    "versions": [
                        {
                            "version": "5.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "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": "7.2.7",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "5.10.271"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/608b7751926ec08fae6a1ac4e7308195da68c362"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4870f9071c9ea3c1423a07741b85a794db30d672"
                },
                {
                    "url": "https://git.kernel.org/stable/c/352f84a381e7b4651b30366e93cb858f3fa9c91a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4924328d6991f25b65bb7c8ff5d56c2a9b254851"
                },
                {
                    "url": "https://git.kernel.org/stable/c/74375caa20fe5165807b4334c783d1790b01f02a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/222abcbe7866fef04563b6eb89fb21f627dcbc77"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a69baeac38677270656e85753d93856a076dee57"
                },
                {
                    "url": "https://git.kernel.org/stable/c/516001d53e6b2ea95a251ee2ef54a1a689a3fd58"
                }
            ],
            "title": "tracing: Free histogram the var ref when its initialization fails",
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}