{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "e31d5a05948e4478ba8396063d1e1f39880928e2"
            },
            {
              "fixed": "23a3ac2e2262a291498567418227b99e1f3606b1"
            },
            {
              "fixed": "52135420e9f75853ea0c6cea7b736e3e98495f7d"
            },
            {
              "fixed": "ca2ceba983bb23ea0202c2882d963253416654a3"
            },
            {
              "fixed": "8460187b4852fd00bd1c76394358053f3fa4d089"
            },
            {
              "fixed": "27e43356d0defb9fc7fa25265219a3ffeb7b3e98"
            },
            {
              "fixed": "35b58d3bc716ebb9ebd10fe1cac8c1177242511c"
            },
            {
              "fixed": "97a0bb491cae39478c6225381f14e9ac67b7bba7"
            },
            {
              "fixed": "288598d80a068a0e9281de35bcb4ce495f189e2a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.35"
            },
            {
              "fixed": "5.10.253"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.203"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.167"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.130"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.78"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.19"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43458.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: caif: hold tty-\u003elink 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-\u003elink-\u003eport.\n\nHold an extra kref on tty-\u003elink 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.",
  "id": "CVE-2026-43458",
  "modified": "2026-07-15T01:49:16.017757200Z",
  "published": "2026-05-08T14:22:21.997Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/23a3ac2e2262a291498567418227b99e1f3606b1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/27e43356d0defb9fc7fa25265219a3ffeb7b3e98"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/288598d80a068a0e9281de35bcb4ce495f189e2a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35b58d3bc716ebb9ebd10fe1cac8c1177242511c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/52135420e9f75853ea0c6cea7b736e3e98495f7d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8460187b4852fd00bd1c76394358053f3fa4d089"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/97a0bb491cae39478c6225381f14e9ac67b7bba7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ca2ceba983bb23ea0202c2882d963253416654a3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43458.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43458"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "serial: caif: hold tty-\u003elink reference in ldisc_open and ser_release"
}