{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80622",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.775Z",
        "datePublished": "2026-08-28T06:48:41.744Z",
        "dateUpdated": "2026-08-28T06:48:41.744Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-28T06:48:41.744Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nchar: tlclk: fix use-after-free in tlclk_cleanup()\n\nThis patch improves the module cleanup process in the tlclk driver to\nprevent potential use-after-free and race conditions.\n\nCurrently, the file_operations structure does not specify the .owner\nfield, which could allow the module to be unloaded while user-space\nprocesses are still interacting with the device. Additionally, the\ntlclk_cleanup() function frees the alarm_events memory before ensuring\nthat blocked processes in the waitqueue are fully awakened and that the\nswitchover_timer has completed.\n\nTo address these cases, this patch:\n- Sets '.owner = THIS_MODULE' in tlclk_fops to safely defer module\n  unloading while the device is in use.\n- Updates tlclk_cleanup() to explicitly wake up all blocked readers\n  (wake_up_all), properly release hardware I/O regions, and safely\n  delete the timer (timer_delete_sync) prior to freeing memory."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/char/tlclk.c"
                    ],
                    "versions": [
                        {
                            "version": "1a80ba88273097933f93b1f40537337416798c70",
                            "lessThan": "09d8d2a46a9ec9ff728f3159a174a2ab25dd0f0a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a80ba88273097933f93b1f40537337416798c70",
                            "lessThan": "96902299a22d126ef5eb3f45cd5d8ceea9e6a735",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a80ba88273097933f93b1f40537337416798c70",
                            "lessThan": "166dd1d5265e067459e674c11688919901813ec2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a80ba88273097933f93b1f40537337416798c70",
                            "lessThan": "764723bd67a6c8f53a8d8309211fb039e2ebcf49",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a80ba88273097933f93b1f40537337416798c70",
                            "lessThan": "c3f0cd76561ae611c2d247ee96dfd559e4197cb7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a80ba88273097933f93b1f40537337416798c70",
                            "lessThan": "3d5e4cc0d9dce79b0429da3134ac7b072ab9009f",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a80ba88273097933f93b1f40537337416798c70",
                            "lessThan": "42223445607a9a5df3cb1c4729abfe3a5085e7ce",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1a80ba88273097933f93b1f40537337416798c70",
                            "lessThan": "bbf003b7794d6ad6f939fdd29f1f1bde8ac554c1",
                            "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/char/tlclk.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.15",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.15",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.261",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.212",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.178",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.145",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.97",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.40",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "lessThanOrEqual": "*",
                            "status": "unaffected",
                            "versionType": "original_commit_for_fix"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                                    "versionEndExcluding": "5.10.261"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.15",
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                                    "versionEndExcluding": "7.2"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/09d8d2a46a9ec9ff728f3159a174a2ab25dd0f0a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/96902299a22d126ef5eb3f45cd5d8ceea9e6a735"
                },
                {
                    "url": "https://git.kernel.org/stable/c/166dd1d5265e067459e674c11688919901813ec2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/764723bd67a6c8f53a8d8309211fb039e2ebcf49"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c3f0cd76561ae611c2d247ee96dfd559e4197cb7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3d5e4cc0d9dce79b0429da3134ac7b072ab9009f"
                },
                {
                    "url": "https://git.kernel.org/stable/c/42223445607a9a5df3cb1c4729abfe3a5085e7ce"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bbf003b7794d6ad6f939fdd29f1f1bde8ac554c1"
                }
            ],
            "title": "char: tlclk: fix use-after-free in tlclk_cleanup()",
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}