{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2025-68376",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-16T14:48:05.310Z",
        "datePublished": "2025-12-24T10:33:05.503Z",
        "dateUpdated": "2026-05-23T16:02:47.909Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-23T16:02:47.909Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncoresight: ETR: Fix ETR buffer use-after-free issue\n\nWhen ETR is enabled as CS_MODE_SYSFS, if the buffer size is changed\nand enabled again, currently sysfs_buf will point to the newly\nallocated memory(buf_new) and free the old memory(buf_old). But the\netr_buf that is being used by the ETR remains pointed to buf_old, not\nupdated to buf_new. In this case, it will result in a memory\nuse-after-free issue.\n\nFix this by checking ETR's mode before updating and releasing buf_old,\nif the mode is CS_MODE_SYSFS, then skip updating and releasing it."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/hwtracing/coresight/coresight-tmc-etr.c"
                    ],
                    "versions": [
                        {
                            "version": "bd2767ec3df2775bc336f441f9068a989ccb919d",
                            "lessThan": "70acbc9c77686b7a521af6d7a543dcd9c324cf07",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bd2767ec3df2775bc336f441f9068a989ccb919d",
                            "lessThan": "cda077a19f5c8d6ec61e5b97deca203d95e3a422",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "bd2767ec3df2775bc336f441f9068a989ccb919d",
                            "lessThan": "35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "fdd3ceb0001da6768bede9779a0190a42e65c404",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.5.8",
                            "lessThan": "6.6",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/hwtracing/coresight/coresight-tmc-etr.c"
                    ],
                    "versions": [
                        {
                            "version": "6.6",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.6",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.17.13",
                            "lessThanOrEqual": "6.17.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.2",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "6.17.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "6.18.2"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6",
                                    "versionEndExcluding": "6.19"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.5.8"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/70acbc9c77686b7a521af6d7a543dcd9c324cf07"
                },
                {
                    "url": "https://git.kernel.org/stable/c/cda077a19f5c8d6ec61e5b97deca203d95e3a422"
                },
                {
                    "url": "https://git.kernel.org/stable/c/35501ac3c7d40a7bb9568c2f89d6b56beaf9bed3"
                }
            ],
            "title": "coresight: ETR: Fix ETR buffer use-after-free issue",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}