{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-80659",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-26T14:34:25.780Z",
        "datePublished": "2026-08-28T06:49:04.389Z",
        "dateUpdated": "2026-08-28T06:49:04.389Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-28T06:49:04.389Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: vub300: defer reset until cmd_mutex is unlocked\n\nvub300_cmndwork_thread() holds cmd_mutex while it sends a command and\nwaits for the command response.  If the response wait times out,\n__vub300_command_response() kills the command URBs and then synchronously\nresets the USB device through usb_reset_device().\n\nThat reset path re-enters the driver through vub300_pre_reset(), which\nalso takes cmd_mutex.  The worker therefore tries to acquire the same\nmutex recursively while it is still holding it from the command path.\n\nThis issue was found by our static analysis tool and then manually\nreviewed against the current tree.\n\nThe grounded PoC kept the real worker and timeout/reset carrier:\n\n  vub300_cmndwork_thread()\n  __vub300_command_response()\n  usb_lock_device_for_reset()\n  usb_reset_device()\n  vub300_pre_reset()\n\nLockdep reported the same-task recursive acquisition on cmd_mutex:\n\n  WARNING: possible recursive locking detected\n  ... (&test_vub300.cmd_mutex) ... at: usb_reset_device... [vuln_msv]\n  ... (&test_vub300.cmd_mutex) ... at: vub300_cmndwork_thread+0x12/0x20 [vuln_msv]\n  Workqueue: vub300_cmd_wq vub300_cmndwork_thread [vuln_msv]\n  *** DEADLOCK ***\n\nReturn a flag from __vub300_command_response() when the timeout path needs\na device reset, then perform the reset after vub300_cmndwork_thread() has\ncleared the in-flight command state and dropped cmd_mutex.  The reset is\nstill attempted before mmc_request_done(), preserving the existing request\ncompletion ordering while avoiding the recursive lock."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/mmc/host/vub300.c"
                    ],
                    "versions": [
                        {
                            "version": "88095e7b473a3d9ec3b9c60429576e9cbd327c89",
                            "lessThan": "8672b8bdbd2063b3fcbd75f729e4706fcdad2257",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "88095e7b473a3d9ec3b9c60429576e9cbd327c89",
                            "lessThan": "8344611477c9241f45f20981990780fc5f0996f8",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "88095e7b473a3d9ec3b9c60429576e9cbd327c89",
                            "lessThan": "2e6b9a394206c76dd417c991312f349435ef35e6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "88095e7b473a3d9ec3b9c60429576e9cbd327c89",
                            "lessThan": "7ee7a77ec2f446109ab52cc80ace7acc22ab6211",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "88095e7b473a3d9ec3b9c60429576e9cbd327c89",
                            "lessThan": "9f5e04235a0b59e6e30af9f45511addf2604d757",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "88095e7b473a3d9ec3b9c60429576e9cbd327c89",
                            "lessThan": "bf9848a22a8e50d39d5e8d871581f0a8110f16b3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "88095e7b473a3d9ec3b9c60429576e9cbd327c89",
                            "lessThan": "c2e1d33929565fa14c48d8a5a45edc3ebfc941b2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "88095e7b473a3d9ec3b9c60429576e9cbd327c89",
                            "lessThan": "ee5fb641c4ccac8406c668d3e947eb20ce44f233",
                            "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/mmc/host/vub300.c"
                    ],
                    "versions": [
                        {
                            "version": "3.0",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "3.0",
                            "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": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.0",
                                    "versionEndExcluding": "5.10.261"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.0",
                                    "versionEndExcluding": "5.15.212"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.0",
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                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.0",
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                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.0",
                                    "versionEndExcluding": "6.12.97"
                                },
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.0",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.0",
                                    "versionEndExcluding": "7.1.5"
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "3.0",
                                    "versionEndExcluding": "7.2"
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            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/8672b8bdbd2063b3fcbd75f729e4706fcdad2257"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8344611477c9241f45f20981990780fc5f0996f8"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2e6b9a394206c76dd417c991312f349435ef35e6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7ee7a77ec2f446109ab52cc80ace7acc22ab6211"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9f5e04235a0b59e6e30af9f45511addf2604d757"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bf9848a22a8e50d39d5e8d871581f0a8110f16b3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c2e1d33929565fa14c48d8a5a45edc3ebfc941b2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ee5fb641c4ccac8406c668d3e947eb20ce44f233"
                }
            ],
            "title": "mmc: vub300: defer reset until cmd_mutex is unlocked",
            "x_generator": {
                "engine": "bippy-1.2.0"
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}