{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-93198",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-17T16:02:15.092Z",
        "datePublished": "2026-09-17T16:12:20.439Z",
        "dateUpdated": "2026-10-19T09:07:10.545Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:07:10.545Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: validate the persisted dirty_tail chain at load\n\nThe writeback worker follows the persisted dirty_tail chain, which is\ndecoded from the cache device independently of the key_tail chain that\ncache_replay() walks and bounds. A crafted image, whose on-media fields are\nauthenticated only by a crc32c with a fixed seed, can aim dirty_tail at a\nchain of last ksets that never terminates, so cache_writeback_fn() re-arms\nitself with no delay forever.\n\nWalk the dirty_tail chain once at load with the same hop cap cache_replay()\nuses and fail the table load with -EIO if it does not reach an end within\nn_segs hops."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/md/dm-pcache/cache.c",
                        "drivers/md/dm-pcache/cache.h",
                        "drivers/md/dm-pcache/cache_key.c"
                    ],
                    "versions": [
                        {
                            "version": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0",
                            "lessThan": "8195cf3f4a82ef49d9b0651c507ed0784caf23fb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0",
                            "lessThan": "4822a030929e0e77aa380722dc42e3e4c9edd346",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1d57628ff95b32d5cfa8d8f50e07690c161e9cf0",
                            "lessThan": "58d620ee9e01d4bdbceaf2ae1450d307a2a9d58b",
                            "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/md/dm-pcache/cache.c",
                        "drivers/md/dm-pcache/cache.h",
                        "drivers/md/dm-pcache/cache_key.c"
                    ],
                    "versions": [
                        {
                            "version": "6.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "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": "6.18",
                                    "versionEndExcluding": "6.18.52"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/8195cf3f4a82ef49d9b0651c507ed0784caf23fb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4822a030929e0e77aa380722dc42e3e4c9edd346"
                },
                {
                    "url": "https://git.kernel.org/stable/c/58d620ee9e01d4bdbceaf2ae1450d307a2a9d58b"
                }
            ],
            "title": "dm-pcache: validate the persisted dirty_tail chain at load",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}