{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53826",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-09T01:27:17.824Z",
        "datePublished": "2025-12-09T01:29:39.679Z",
        "dateUpdated": "2026-05-11T19:52:16.903Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:52:16.903Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()\n\nWear-leveling entry could be freed in error path, which may be accessed\nagain in eraseblk_count_seq_show(), for example:\n\n__erase_worker                eraseblk_count_seq_show\n                                wl = ubi->lookuptbl[*block_number]\n\t\t\t\tif (wl)\n  wl_entry_destroy\n    ubi->lookuptbl[e->pnum] = NULL\n    kmem_cache_free(ubi_wl_entry_slab, e)\n\t\t                   erase_count = wl->ec  // UAF!\n\nWear-leveling entry updating/accessing in ubi->lookuptbl should be\nprotected by ubi->wl_lock, fix it by adding ubi->wl_lock to serialize\nwl entry accessing between wl_entry_destroy() and\neraseblk_count_seq_show().\n\nFetch a reproducer in [Link]."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/mtd/ubi/wl.c"
                    ],
                    "versions": [
                        {
                            "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
                            "lessThan": "3f9b63dfce44a7c3c095dd93d910408e07ab1845",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
                            "lessThan": "84250da1c63cb7d421a3b4812b5c2ce2e47d31a1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
                            "lessThan": "1cb14c06d6035539ef4215c4ba0871aea71d7c38",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
                            "lessThan": "9d448dd6bcb61a508204b57ea1f454ba9bac2f24",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
                            "lessThan": "79548ccdd992707879b4b683b7251c58ddf26f12",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
                            "lessThan": "84253f3c2dad6be10d30c92626c763d9a9f512ad",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
                            "lessThan": "a100de2974d208cfca032179b02ed4d1a0a7f143",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "801c135ce73d5df1caf3eca35b66a10824ae0707",
                            "lessThan": "a240bc5c43130c6aa50831d7caaa02a1d84e1bce",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/mtd/ubi/wl.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.22",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.22",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.14.308",
                            "lessThanOrEqual": "4.14.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "4.19.276",
                            "lessThanOrEqual": "4.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.4.235",
                            "lessThanOrEqual": "5.4.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.173",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.100",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.18",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.2.5",
                            "lessThanOrEqual": "6.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3",
                            "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": "2.6.22",
                                    "versionEndExcluding": "4.14.308"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "4.19.276"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "5.4.235"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
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                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "5.15.100"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.1.18"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.2.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/3f9b63dfce44a7c3c095dd93d910408e07ab1845"
                },
                {
                    "url": "https://git.kernel.org/stable/c/84250da1c63cb7d421a3b4812b5c2ce2e47d31a1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1cb14c06d6035539ef4215c4ba0871aea71d7c38"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9d448dd6bcb61a508204b57ea1f454ba9bac2f24"
                },
                {
                    "url": "https://git.kernel.org/stable/c/79548ccdd992707879b4b683b7251c58ddf26f12"
                },
                {
                    "url": "https://git.kernel.org/stable/c/84253f3c2dad6be10d30c92626c763d9a9f512ad"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a100de2974d208cfca032179b02ed4d1a0a7f143"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a240bc5c43130c6aa50831d7caaa02a1d84e1bce"
                }
            ],
            "title": "ubi: Fix UAF wear-leveling entry in eraseblk_count_seq_show()",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}