{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-89552",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.723Z",
        "datePublished": "2026-09-11T19:44:26.091Z",
        "dateUpdated": "2026-10-21T12:47:50.327Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-21T12:47:50.327Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nparams: fix charp corruption on allocation failure\n\nparam_set_charp() stores charp parameters in allocated memory after slab is\navailable, and releases the previous value when the parameter is updated.\n\nThe previous value is released before the replacement allocation succeeds.\nIf kmalloc_parameter() fails, the setter returns -ENOMEM with the parameter\nleft as NULL.\n\nFailing zswap's compressor update before zswap is initialized can later\ntrigger:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000000\n  RIP: 0010:strcmp+0x10/0x30\n  Call Trace:\n    zswap_setup+0x3b1/0x490\n    zswap_enabled_param_set+0x5b/0xa0\n    param_attr_store+0x93/0xe0\n    module_attr_store+0x1c/0x30\n    kernfs_fop_write_iter+0x116/0x1f0\n\nAllocate and copy the replacement first, then replace the parameter value\nonly after allocation succeeds."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/params.c"
                    ],
                    "versions": [
                        {
                            "version": "e180a6b7759a99a28cbcce3547c4c80822cb6c2a",
                            "lessThan": "31b41ea8383d51992d6b0dfe3a99da1dec8ce1c1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e180a6b7759a99a28cbcce3547c4c80822cb6c2a",
                            "lessThan": "614f873268c5b172804c9af6639bd17b7e1e2359",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e180a6b7759a99a28cbcce3547c4c80822cb6c2a",
                            "lessThan": "704ecd010d4a9b33160e40b74eb402f6b86a18e0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e180a6b7759a99a28cbcce3547c4c80822cb6c2a",
                            "lessThan": "0d8e2404925a0607ffec79a53170715a46936896",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e180a6b7759a99a28cbcce3547c4c80822cb6c2a",
                            "lessThan": "3dfaae04243cde460d82dfc2a7dd0bb6664d20ae",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "kernel/params.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.30",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.30",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.160",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.109",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.50",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.4",
                            "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": "2.6.30",
                                    "versionEndExcluding": "6.6.160"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "6.12.109"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "6.18.50"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "7.2.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.30",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/31b41ea8383d51992d6b0dfe3a99da1dec8ce1c1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/614f873268c5b172804c9af6639bd17b7e1e2359"
                },
                {
                    "url": "https://git.kernel.org/stable/c/704ecd010d4a9b33160e40b74eb402f6b86a18e0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/0d8e2404925a0607ffec79a53170715a46936896"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3dfaae04243cde460d82dfc2a7dd0bb6664d20ae"
                }
            ],
            "title": "params: fix charp corruption on allocation failure",
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                "engine": "bippy-1.2.0"
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}