{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-64528",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-19T15:36:31.794Z",
        "datePublished": "2026-07-25T09:20:51.774Z",
        "dateUpdated": "2026-07-25T09:20:51.774Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-07-25T09:20:51.774Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: serial: samsung: Remove redundant port lock acquisition in rx helpers\n\nSashiko identified a deadlock when the console flow is engaged [1].\n\nWhen console flow control is enabled (UPF_CONS_FLOW),\ns3c24xx_serial_stop_tx() calls s3c24xx_serial_rx_enable() and\ns3c24xx_serial_start_tx() calls s3c24xx_serial_rx_disable().\n\nThe serial core framework invokes the .stop_tx() and .start_tx()\ncallbacks with the port->lock spinlock already held. Furthermore, all\ninternal driver paths that invoke stop_tx (such as the DMA TX\ncompletion handler s3c24xx_serial_tx_dma_complete() or the PIO TX IRQ\nhandler s3c24xx_serial_tx_irq()) also acquire port->lock prior to\ncalling it. (Note that s3c24xx_serial_start_tx() is only invoked by the\nserial core).\n\nHowever, s3c24xx_serial_rx_enable() and s3c24xx_serial_rx_disable()\nunconditionally attempt to acquire port->lock again using\nuart_port_lock_irqsave(). Since spinlocks are not recursive, this\ncauses a deadlock on the same CPU when console flow control is engaged.\n\nRemove the redundant lock acquisition from both rx helper functions."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/tty/serial/samsung_tty.c"
                    ],
                    "versions": [
                        {
                            "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
                            "lessThan": "ee9eb72be95490602c493db050c73d925c3a4d74",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
                            "lessThan": "10014eb7eee351f7b587f8ac85830f0c9343cb9a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
                            "lessThan": "f4c3e63fa8639aedf96fb200d9939945a9eed51e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
                            "lessThan": "a9c22e0f93ba18322a6623ecdda2f0cd858ca350",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
                            "lessThan": "14143ec10d69f42806b5d7b046f0fd1b835831ae",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
                            "lessThan": "9fd48937046efc9abb89379d63ee9cc5c661d711",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
                            "lessThan": "9c92b42207978559e32903c3098aaf5c5b5788b2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b497549a035c2a81b71c7a27f2b00c8a16c09423",
                            "lessThan": "a3bb136bff5e6a5e48cdd813246c9c4686feaaa9",
                            "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/tty/serial/samsung_tty.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.27",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.27",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.259",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.210",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.176",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.143",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.93",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.35",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0.12",
                            "lessThanOrEqual": "7.0.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1",
                            "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": "2.6.27",
                                    "versionEndExcluding": "5.10.259"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "5.15.210"
                                },
                                {
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "6.12.93"
                                },
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                                    "versionStartIncluding": "2.6.27",
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                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.27",
                                    "versionEndExcluding": "7.1"
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            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/ee9eb72be95490602c493db050c73d925c3a4d74"
                },
                {
                    "url": "https://git.kernel.org/stable/c/10014eb7eee351f7b587f8ac85830f0c9343cb9a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/f4c3e63fa8639aedf96fb200d9939945a9eed51e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a9c22e0f93ba18322a6623ecdda2f0cd858ca350"
                },
                {
                    "url": "https://git.kernel.org/stable/c/14143ec10d69f42806b5d7b046f0fd1b835831ae"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9fd48937046efc9abb89379d63ee9cc5c661d711"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9c92b42207978559e32903c3098aaf5c5b5788b2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a3bb136bff5e6a5e48cdd813246c9c4686feaaa9"
                }
            ],
            "title": "tty: serial: samsung: Remove redundant port lock acquisition in rx helpers",
            "x_generator": {
                "engine": "bippy-1.2.0"
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    }
}