{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-46121",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-13T15:03:33.098Z",
        "datePublished": "2026-05-28T09:35:36.292Z",
        "dateUpdated": "2026-06-14T17:55:59.503Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-06-14T17:55:59.503Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/sysfs-schemes: protect memcg_path kfree() with damon_sysfs_lock\n\nPatch series \"mm/damon/sysfs-schemes: fix use-after-free for [memcg_]path\".\n\nReads of 'memcg_path' and 'path' files in DAMON sysfs interface could race\nwith their writes, results in use-after-free.  Fix those.\n\n\nThis patch (of 2):\n\ndamon_sysfs_scheme_filter->mmecg_path can be read and written by users,\nvia DAMON sysfs memcg_path file.  It can also be indirectly read, for the\nparameters {on,off}line committing to DAMON.  The reads for parameters\ncommitting are protected by damon_sysfs_lock to avoid the sysfs files\nbeing destroyed while any of the parameters are being read.  But the\nuser-driven direct reads and writes are not protected by any lock, while\nthe write is deallocating the memcg_path-pointing buffer.  As a result,\nthe readers could read the already freed buffer (user-after-free).  Note\nthat the user-reads don't race when the same open file is used by the\nwriter, due to kernfs's open file locking.  Nonetheless, doing the reads\nand writes with separate open files would be common.  Fix it by protecting\nboth the user-direct reads and writes with damon_sysfs_lock."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/damon/sysfs-schemes.c"
                    ],
                    "versions": [
                        {
                            "version": "490a43d07f1663d827e802720d30cbc0494e4f81",
                            "lessThan": "b1e9f2d5870776347edef927f9bb3ea19b8e3abb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c5d5b0047b0c0f304608f3824139f7bd34c48413",
                            "lessThan": "c88802d0e8edd14b6cd2daf3000f99adbc4c85c5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4f489fe6afb395dbc79840efa3c05440b760d883",
                            "lessThan": "eafd6f5372d29b0dd213799b92c2c9c7ad31d7da",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4f489fe6afb395dbc79840efa3c05440b760d883",
                            "lessThan": "baecc45ad60e621ef14d6c1e7f41ef36bbfdf910",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4f489fe6afb395dbc79840efa3c05440b760d883",
                            "lessThan": "1e68eb96e8beb1abefd12dd22c5637795d8a877e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a158ac0538dd5695eeaa00aa0720d711f3e4ef1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "6.6.96",
                            "lessThan": "6.6.140",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.36",
                            "lessThan": "6.12.88",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.15.5",
                            "lessThan": "6.16",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "mm/damon/sysfs-schemes.c"
                    ],
                    "versions": [
                        {
                            "version": "6.16",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.16",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.140",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.88",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.30",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.7",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "6.6.96",
                                    "versionEndExcluding": "6.6.140"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12.36",
                                    "versionEndExcluding": "6.12.88"
                                },
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                                    "versionStartIncluding": "6.16",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.0.7"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.16",
                                    "versionEndExcluding": "7.1"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.15.5"
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                            ]
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b1e9f2d5870776347edef927f9bb3ea19b8e3abb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c88802d0e8edd14b6cd2daf3000f99adbc4c85c5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/eafd6f5372d29b0dd213799b92c2c9c7ad31d7da"
                },
                {
                    "url": "https://git.kernel.org/stable/c/baecc45ad60e621ef14d6c1e7f41ef36bbfdf910"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1e68eb96e8beb1abefd12dd22c5637795d8a877e"
                }
            ],
            "title": "mm/damon/sysfs-schemes: protect memcg_path kfree() with damon_sysfs_lock",
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