{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-43458",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-01T14:12:56.010Z",
        "datePublished": "2026-05-08T14:22:21.997Z",
        "dateUpdated": "2026-05-11T22:24:58.635Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:24:58.635Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: caif: hold tty->link reference in ldisc_open and ser_release\n\nA reproducer triggers a KASAN slab-use-after-free in pty_write_room()\nwhen caif_serial's TX path calls tty_write_room(). The faulting access\nis on tty->link->port.\n\nHold an extra kref on tty->link for the lifetime of the caif_serial line\ndiscipline: get it in ldisc_open() and drop it in ser_release(), and\nalso drop it on the ldisc_open() error path.\n\nWith this change applied, the reproducer no longer triggers the UAF in\nmy testing."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/net/caif/caif_serial.c"
                    ],
                    "versions": [
                        {
                            "version": "e31d5a05948e4478ba8396063d1e1f39880928e2",
                            "lessThan": "23a3ac2e2262a291498567418227b99e1f3606b1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e31d5a05948e4478ba8396063d1e1f39880928e2",
                            "lessThan": "52135420e9f75853ea0c6cea7b736e3e98495f7d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e31d5a05948e4478ba8396063d1e1f39880928e2",
                            "lessThan": "ca2ceba983bb23ea0202c2882d963253416654a3",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e31d5a05948e4478ba8396063d1e1f39880928e2",
                            "lessThan": "8460187b4852fd00bd1c76394358053f3fa4d089",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e31d5a05948e4478ba8396063d1e1f39880928e2",
                            "lessThan": "27e43356d0defb9fc7fa25265219a3ffeb7b3e98",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e31d5a05948e4478ba8396063d1e1f39880928e2",
                            "lessThan": "35b58d3bc716ebb9ebd10fe1cac8c1177242511c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e31d5a05948e4478ba8396063d1e1f39880928e2",
                            "lessThan": "97a0bb491cae39478c6225381f14e9ac67b7bba7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "e31d5a05948e4478ba8396063d1e1f39880928e2",
                            "lessThan": "288598d80a068a0e9281de35bcb4ce495f189e2a",
                            "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/net/caif/caif_serial.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.35",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.35",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.253",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.203",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.167",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.130",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.78",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.19",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.9",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "2.6.35",
                                    "versionEndExcluding": "5.10.253"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
                                    "versionEndExcluding": "6.1.167"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
                                    "versionEndExcluding": "6.6.130"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
                                    "versionEndExcluding": "6.12.78"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
                                    "versionEndExcluding": "6.18.19"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
                                    "versionEndExcluding": "6.19.9"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.35",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/23a3ac2e2262a291498567418227b99e1f3606b1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/52135420e9f75853ea0c6cea7b736e3e98495f7d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ca2ceba983bb23ea0202c2882d963253416654a3"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8460187b4852fd00bd1c76394358053f3fa4d089"
                },
                {
                    "url": "https://git.kernel.org/stable/c/27e43356d0defb9fc7fa25265219a3ffeb7b3e98"
                },
                {
                    "url": "https://git.kernel.org/stable/c/35b58d3bc716ebb9ebd10fe1cac8c1177242511c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/97a0bb491cae39478c6225381f14e9ac67b7bba7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/288598d80a068a0e9281de35bcb4ce495f189e2a"
                }
            ],
            "title": "serial: caif: hold tty->link reference in ldisc_open and ser_release",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}