{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-89839",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.769Z",
        "datePublished": "2026-09-16T10:31:13.727Z",
        "dateUpdated": "2026-10-19T08:53:32.430Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:53:32.430Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set()\n\nf2fs_xattr_advise_set() calls inode_owner_or_capable() with &nop_mnt_idmap\nbefore allowing the \"system.advise\" xattr to be set, instead of the idmap\nthat the VFS passes to the ->set() handler.\n\nf2fs supports idmapped mounts, so on such a mount this checks the caller's\nfsuid against the unmapped on-disk owner rather than the mapped owner: the\nactual owner can be wrongly denied with -EPERM and an unrelated caller\nwrongly allowed.  Pass the handler's idmap instead."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/f2fs/xattr.c"
                    ],
                    "versions": [
                        {
                            "version": "01beba7957a26f9b7179127e8ad56bb5a0f56138",
                            "lessThan": "4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "01beba7957a26f9b7179127e8ad56bb5a0f56138",
                            "lessThan": "c3e2692c7a58e0bdb84bd658d827e89dcecea3ad",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "01beba7957a26f9b7179127e8ad56bb5a0f56138",
                            "lessThan": "3b681229e9f8fb1dd29bc65983bf3c87779e4ca3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "01beba7957a26f9b7179127e8ad56bb5a0f56138",
                            "lessThan": "ab31e3b774f5d06b4489cef6c297b48c47c9dcbd",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "01beba7957a26f9b7179127e8ad56bb5a0f56138",
                            "lessThan": "a54ffce4637acb0db8e695188a6c7f99f14c3576",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/f2fs/xattr.c"
                    ],
                    "versions": [
                        {
                            "version": "6.3",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.3",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.51",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.5",
                            "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": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "6.18.51"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "7.2.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.3",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c3e2692c7a58e0bdb84bd658d827e89dcecea3ad"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3b681229e9f8fb1dd29bc65983bf3c87779e4ca3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ab31e3b774f5d06b4489cef6c297b48c47c9dcbd"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a54ffce4637acb0db8e695188a6c7f99f14c3576"
                }
            ],
            "title": "f2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}