{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-45892",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-13T15:03:33.083Z",
        "datePublished": "2026-05-27T12:17:03.175Z",
        "dateUpdated": "2026-05-30T10:41:42.703Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-30T10:41:42.703Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: drop extent cache after doing PARTIAL_VALID1 zeroout\n\nWhen splitting an unwritten extent in the middle and converting it to\ninitialized in ext4_split_extent() with the EXT4_EXT_MAY_ZEROOUT and\nEXT4_EXT_DATA_VALID2 flags set, it could leave a stale unwritten extent.\n\nAssume we have an unwritten file and buffered write in the middle of it\nwithout dioread_nolock enabled, it will allocate blocks as written\nextent.\n\n       0  A      B  N\n       [UUUUUUUUUUUU] on-disk extent      U: unwritten extent\n       [UUUUUUUUUUUU] extent status tree\n       [--DDDDDDDD--]                     D: valid data\n          |<-  ->| ----> this range needs to be initialized\n\next4_split_extent() first try to split this extent at B with\nEXT4_EXT_DATA_PARTIAL_VALID1 and EXT4_EXT_MAY_ZEROOUT flag set, but\next4_split_extent_at() failed to split this extent due to temporary lack\nof space. It zeroout B to N and leave the entire extent as unwritten.\n\n       0  A      B  N\n       [UUUUUUUUUUUU] on-disk extent\n       [UUUUUUUUUUUU] extent status tree\n       [--DDDDDDDDZZ]                     Z: zeroed data\n\next4_split_extent() then try to split this extent at A with\nEXT4_EXT_DATA_VALID2 flag set. This time, it split successfully and\nleave an written extent from A to N.\n\n       0  A      B  N\n       [UUWWWWWWWWWW] on-disk extent      W: written extent\n       [UUUUUUUUUUUU] extent status tree\n       [--DDDDDDDDZZ]\n\nFinally ext4_map_create_blocks() only insert extent A to B to the extent\nstatus tree, and leave an stale unwritten extent in the status tree.\n\n       0  A      B  N\n       [UUWWWWWWWWWW] on-disk extent      W: written extent\n       [UUWWWWWWWWUU] extent status tree\n       [--DDDDDDDDZZ]\n\nFix this issue by always cached extent status entry after zeroing out\nthe second part."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ext4/extents.c"
                    ],
                    "versions": [
                        {
                            "version": "ddf854e59166533b0f46ba32cd6cd9aca3197d1b",
                            "lessThan": "28db4bfc6f82fd20e2aadb7fc162244109a4eb31",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "58ddae5d77b1db3a27b891c75a8fa120239ac092",
                            "lessThan": "f0931a5c17005a0c4fc35bd1a001245effc3354b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d17857b4fb9ba5745b59be0ef38fd532991fccbf",
                            "lessThan": "d8ee559fccdef713f058cfe5f2c03dc9b18be3b1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "d67c8ecf3d8fda9b8ef80e6f665d84b6d6ac9d88",
                            "lessThan": "c2ee51d684adca7645e4aa74adca13f6750390bc",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "7015fcf473796e1d2d876f241bd9e0c36f3d4eef",
                            "lessThan": "a1b962a821e7a52d48212ae269b45808b4411267",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1bf6974822d1dba86cf11b5f05498581cf3488a2",
                            "lessThan": "6d882ea3b0931b43530d44149b79fcd4ffc13030",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ext4/extents.c"
                    ],
                    "versions": [
                        {
                            "version": "6.1.167",
                            "lessThan": "6.1.168",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.167",
                                    "versionEndExcluding": "6.1.168"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/28db4bfc6f82fd20e2aadb7fc162244109a4eb31"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f0931a5c17005a0c4fc35bd1a001245effc3354b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/d8ee559fccdef713f058cfe5f2c03dc9b18be3b1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c2ee51d684adca7645e4aa74adca13f6750390bc"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a1b962a821e7a52d48212ae269b45808b4411267"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6d882ea3b0931b43530d44149b79fcd4ffc13030"
                }
            ],
            "title": "ext4: drop extent cache after doing PARTIAL_VALID1 zeroout",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}