{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-39724",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-39724",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-09-05T17:21:32.005Z",
    "updatedAt": "2026-10-15T01:08:07.062Z",
    "importedAt": "2026-10-24T01:57:34.152Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "serial: 8250: fix panic due to PSLVERR",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: 8250: fix panic due to PSLVERR\n\nWhen the PSLVERR_RESP_EN parameter is set to 1, the device generates\nan error response if an attempt is made to read an empty RBR (Receive\nBuffer Register) while the FIFO is enabled.\n\nIn serial8250_do_startup(), calling serial_port_out(port, UART_LCR,\nUART_LCR_WLEN8) triggers dw8250_check_lcr(), which invokes\ndw8250_force_idle() and serial8250_clear_and_reinit_fifos(). The latter\nfunction enables the FIFO via serial_out(p, UART_FCR, p->fcr).\nExecution proceeds to the serial_port_in(port, UART_RX).\nThis satisfies the PSLVERR trigger condition.\n\nWhen another CPU (e.g., using printk()) is accessing the UART (UART\nis busy), the current CPU fails the check (value & ~UART_LCR_SPAR) ==\n(lcr & ~UART_LCR_SPAR) in dw8250_check_lcr(), causing it to enter\ndw8250_force_idle().\n\nPut serial_port_out(port, UART_LCR, UART_LCR_WLEN8) under the port->lock\nto fix this issue.\n\nPanic backtrace:\n[    0.442336] Oops - unknown exception [#1]\n[    0.442343] epc : dw8250_serial_in32+0x1e/0x4a\n[    0.442351]  ra : serial8250_do_startup+0x2c8/0x88e\n...\n[    0.442416] console_on_rootfs+0x26/0x70",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c49436b657d0a56a6ad90d14a7c3041add7cf64d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0b882f00655afefbc7729c6b5aec86f7a5473a3d"
            },
            {
              "version": "c49436b657d0a56a6ad90d14a7c3041add7cf64d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b8ca8e3f75ede308b4d49a6ca5081460be01bdb5"
            },
            {
              "version": "c49436b657d0a56a6ad90d14a7c3041add7cf64d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "68c4613e89f000e8198f9ace643082c697921c9f"
            },
            {
              "version": "c49436b657d0a56a6ad90d14a7c3041add7cf64d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c826943abf473a3f7260fbadfad65e44db475460"
            },
            {
              "version": "c49436b657d0a56a6ad90d14a7c3041add7cf64d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cb7b3633ed749db8e56f475f43c960652cbd6882"
            },
            {
              "version": "c49436b657d0a56a6ad90d14a7c3041add7cf64d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8e2739478c164147d0774802008528d9e03fb802"
            },
            {
              "version": "c49436b657d0a56a6ad90d14a7c3041add7cf64d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "38c0ea484dedb58cb3a4391229933e16be0d1031"
            },
            {
              "version": "c49436b657d0a56a6ad90d14a7c3041add7cf64d",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7f8fdd4dbffc05982b96caf586f77a014b2a9353"
            },
            {
              "version": "6d5e79331417886196cb3a733bdb6645ba85bc42",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "2401577586898b3590db80f8b97a26f81f0f6d4e",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "3.10.48",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.11"
            },
            {
              "version": "3.12.24",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.13"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.13",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.13"
            },
            {
              "version": "5.4.297",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.241",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.190",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.149",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.103",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.44",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.16.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.16.*"
            },
            {
              "version": "6.17",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}