{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2023-53777",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-12-08T23:58:35.271Z",
        "datePublished": "2025-12-09T00:00:32.947Z",
        "dateUpdated": "2026-05-11T19:51:20.826Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T19:51:20.826Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: kill hooked chains to avoid loops on deduplicated compressed images\n\nAfter heavily stressing EROFS with several images which include a\nhand-crafted image of repeated patterns for more than 46 days, I found\ntwo chains could be linked with each other almost simultaneously and\nform a loop so that the entire loop won't be submitted.  As a\nconsequence, the corresponding file pages will remain locked forever.\n\nIt can be _only_ observed on data-deduplicated compressed images.\nFor example, consider two chains with five pclusters in total:\n\tChain 1:  2->3->4->5    -- The tail pcluster is 5;\n        Chain 2:  5->1->2       -- The tail pcluster is 2.\n\nChain 2 could link to Chain 1 with pcluster 5; and Chain 1 could link\nto Chain 2 at the same time with pcluster 2.\n\nSince hooked chains are all linked locklessly now, I have no idea how\nto simply avoid the race.  Instead, let's avoid hooked chains completely\nuntil I could work out a proper way to fix this and end users finally\ntell us that it's needed to add it back.\n\nActually, this optimization can be found with multi-threaded workloads\n(especially even more often on deduplicated compressed images), yet I'm\nnot sure about the overall system impacts of not having this compared\nwith implementation complexity."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/erofs/zdata.c"
                    ],
                    "versions": [
                        {
                            "version": "267f2492c8f71dac44399988b510f9bf6b074a51",
                            "lessThan": "d3b39ea24835ac03da1a30f93ae7c05d55a40191",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "267f2492c8f71dac44399988b510f9bf6b074a51",
                            "lessThan": "b5b0d52f00e4bacb0ebdf47cd7016b0485fffad2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "267f2492c8f71dac44399988b510f9bf6b074a51",
                            "lessThan": "10c2b98a40d9044a3e97f4697ca6213bad7e19c2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "267f2492c8f71dac44399988b510f9bf6b074a51",
                            "lessThan": "967c28b23f6c89bb8eef6a046ea88afe0d7c1029",
                            "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/erofs/zdata.c"
                    ],
                    "versions": [
                        {
                            "version": "6.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.0",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.39",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.3.13",
                            "lessThanOrEqual": "6.3.*",
                            "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": "6.0",
                                    "versionEndExcluding": "6.1.39"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.3.13"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.4.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.0",
                                    "versionEndExcluding": "6.5"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/d3b39ea24835ac03da1a30f93ae7c05d55a40191"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b5b0d52f00e4bacb0ebdf47cd7016b0485fffad2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/10c2b98a40d9044a3e97f4697ca6213bad7e19c2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/967c28b23f6c89bb8eef6a046ea88afe0d7c1029"
                }
            ],
            "title": "erofs: kill hooked chains to avoid loops on deduplicated compressed images",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}