{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-89983",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.779Z",
        "datePublished": "2026-09-16T10:32:59.461Z",
        "dateUpdated": "2026-10-19T08:55:57.766Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:55:57.766Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: core: fix debugfs UAF on adapter removal\n\ni2c_del_adapter() frees the adapter's debugfs directory before it\nunregisters the adapter device, but the new_device sysfs attribute\nstays writable until device_del(). A write racing with removal still\nreaches i2c_device_probe(), which passes the freed adap->debugfs to\ndebugfs_create_dir() as the new client's parent:\n\n  BUG: KASAN: slab-use-after-free in lookup_noperm_common+0x407/0x430\n  Read of size 4 at addr ffff88803ef87810 by task syz.0.61/6090\n   lookup_noperm_common+0x407/0x430\n   simple_start_creating+0x9c/0x110\n   debugfs_start_creating+0xdb/0x1a0\n   debugfs_create_dir+0x24/0x350\n   i2c_device_probe+0x814/0xbf0\n\nIt's technically possible to create a client after i2c_deregister_clients\nhas run. That client will never be unregistered and make\nwait_for_completion hang.\n\nClose the window by removing the new_device attribute at the start of\ni2c_del_adapter(). device_remove_file() will drain any clients left."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/i2c/i2c-core-base.c"
                    ],
                    "versions": [
                        {
                            "version": "0e8926abfd7aee220e44be5566affd7a8580b50e",
                            "lessThan": "dc33a9762538b3250ed6b5644a4d44c748be33a6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e2a268b0f512fb18ae5961b1fdfaf610ed6bd661",
                            "lessThan": "1f1bcd4eca6caa3e4258d9a31925112539406eb6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "4a2be5a72865bdd219b2d8c327b9fa03e87a4a9e",
                            "lessThan": "f9094ace03e0a532cc6505d2e97b61ae738da4ed",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "73febd775bdbdb98c81255ff85773ac410ded5c4",
                            "lessThan": "643fb872aa04342d27dbef52b2b3cf3fe71b2c7b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "73febd775bdbdb98c81255ff85773ac410ded5c4",
                            "lessThan": "112b3d48084c820bbccf41d9783fd122e3ac4cb0",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "73febd775bdbdb98c81255ff85773ac410ded5c4",
                            "lessThan": "552836be2d95c688eede6371f85532abe1a71232",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "73febd775bdbdb98c81255ff85773ac410ded5c4",
                            "lessThan": "b15b548d52b43ba8ac4652bc2c7244a8dd1e9622",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "5.15.168",
                            "lessThan": "5.15.221",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.113",
                            "lessThan": "6.1.188",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.55",
                            "lessThan": "6.6.157",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/i2c/i2c-core-base.c"
                    ],
                    "versions": [
                        {
                            "version": "6.8",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.8",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.51",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.5",
                            "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": "5.15.168",
                                    "versionEndExcluding": "5.15.221"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.113",
                                    "versionEndExcluding": "6.1.188"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6.55",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.8",
                                    "versionEndExcluding": "6.12.110"
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                                    "versionStartIncluding": "6.8",
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                                    "versionStartIncluding": "6.8",
                                    "versionEndExcluding": "7.2.5"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.8",
                                    "versionEndExcluding": "7.3"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/dc33a9762538b3250ed6b5644a4d44c748be33a6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/1f1bcd4eca6caa3e4258d9a31925112539406eb6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f9094ace03e0a532cc6505d2e97b61ae738da4ed"
                },
                {
                    "url": "https://git.kernel.org/stable/c/643fb872aa04342d27dbef52b2b3cf3fe71b2c7b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/112b3d48084c820bbccf41d9783fd122e3ac4cb0"
                },
                {
                    "url": "https://git.kernel.org/stable/c/552836be2d95c688eede6371f85532abe1a71232"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b15b548d52b43ba8ac4652bc2c7244a8dd1e9622"
                }
            ],
            "title": "i2c: core: fix debugfs UAF on adapter removal",
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}