{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53260",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-09-15T14:19:21.850Z",
        "datePublished": "2025-09-15T14:46:31.919Z",
        "dateUpdated": "2026-05-11T19:41:21.024Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:41:21.024Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\novl: fix null pointer dereference in ovl_permission()\n\nFollowing process:\n          P1                     P2\n path_lookupat\n  link_path_walk\n   inode_permission\n    ovl_permission\n      ovl_i_path_real(inode, &realpath)\n        path->dentry = ovl_i_dentry_upper(inode)\n                          drop_cache\n\t\t\t   __dentry_kill(ovl_dentry)\n\t\t            iput(ovl_inode)\n\t\t             ovl_destroy_inode(ovl_inode)\n\t\t              dput(oi->__upperdentry)\n\t\t               dentry_kill(upperdentry)\n\t\t                dentry_unlink_inode\n\t\t\t\t upperdentry->d_inode = NULL\n      realinode = d_inode(realpath.dentry) // return NULL\n      inode_permission(realinode)\n       inode->i_sb  // NULL pointer dereference\n, will trigger an null pointer dereference at realinode:\n  [  335.664979] BUG: kernel NULL pointer dereference,\n                 address: 0000000000000002\n  [  335.668032] CPU: 0 PID: 2592 Comm: ls Not tainted 6.3.0\n  [  335.669956] RIP: 0010:inode_permission+0x33/0x2c0\n  [  335.678939] Call Trace:\n  [  335.679165]  <TASK>\n  [  335.679371]  ovl_permission+0xde/0x320\n  [  335.679723]  inode_permission+0x15e/0x2c0\n  [  335.680090]  link_path_walk+0x115/0x550\n  [  335.680771]  path_lookupat.isra.0+0xb2/0x200\n  [  335.681170]  filename_lookup+0xda/0x240\n  [  335.681922]  vfs_statx+0xa6/0x1f0\n  [  335.682233]  vfs_fstatat+0x7b/0xb0\n\nFetch a reproducer in [Link].\n\nUse the helper ovl_i_path_realinode() to get realinode and then do\nnon-nullptr checking."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/overlayfs/inode.c"
                    ],
                    "versions": [
                        {
                            "version": "4b7791b2e95805eaa9568761741d33cf929c930c",
                            "lessThan": "53dd2ca2c02fdcfe3aad2345091d371063f97d17",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b7791b2e95805eaa9568761741d33cf929c930c",
                            "lessThan": "69f9ae7edf9ec0ff500429101923347fcba5c8c4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4b7791b2e95805eaa9568761741d33cf929c930c",
                            "lessThan": "1a73f5b8f079fd42a544c1600beface50c63af7c",
                            "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/overlayfs/inode.c"
                    ],
                    "versions": [
                        {
                            "version": "5.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "5.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.43",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.4.4",
                            "lessThanOrEqual": "6.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.5",
                            "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": "5.19",
                                    "versionEndExcluding": "6.1.43"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.4.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.19",
                                    "versionEndExcluding": "6.5"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/53dd2ca2c02fdcfe3aad2345091d371063f97d17"
                },
                {
                    "url": "https://git.kernel.org/stable/c/69f9ae7edf9ec0ff500429101923347fcba5c8c4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1a73f5b8f079fd42a544c1600beface50c63af7c"
                }
            ],
            "title": "ovl: fix null pointer dereference in ovl_permission()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        },
        "adp": [
            {
                "metrics": [
                    {
                        "cvssV3_1": {
                            "scope": "UNCHANGED",
                            "version": "3.1",
                            "baseScore": 5.5,
                            "attackVector": "LOCAL",
                            "baseSeverity": "MEDIUM",
                            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                            "integrityImpact": "NONE",
                            "userInteraction": "NONE",
                            "attackComplexity": "LOW",
                            "availabilityImpact": "HIGH",
                            "privilegesRequired": "LOW",
                            "confidentialityImpact": "NONE"
                        }
                    },
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "id": "CVE-2023-53260",
                                "role": "CISA Coordinator",
                                "options": [
                                    {
                                        "Exploitation": "none"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "partial"
                                    }
                                ],
                                "version": "2.0.3",
                                "timestamp": "2026-01-14T18:02:35.668254Z"
                            }
                        }
                    }
                ],
                "problemTypes": [
                    {
                        "descriptions": [
                            {
                                "lang": "en",
                                "type": "CWE",
                                "cweId": "CWE-476",
                                "description": "CWE-476 NULL Pointer Dereference"
                            }
                        ]
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-01-14T18:02:53.254Z"
                }
            }
        ]
    }
}