{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "640594a04f119338019b0aeed70c7301216595b3"
            },
            {
              "fixed": "693b0b594b0f278bafa784984129c0c0f988e352"
            },
            {
              "fixed": "694921a93f3e3621e067afc545cedf6fe3b234a9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46257.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nclocksource/drivers/timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched_clock.\n\nOn SP804, the delay timer shares the same clkevt instance with\nsched_clock. On some platforms, when\nsp804_clocksource_and_sched_clock_init is called with use_sched_clock\nnot set to 1, sched_clkevt is not properly initialized. However,\nsp804_register_delay_timer is invoked unconditionally, and\nread_current_timer() subsequently calls sp804_read on an uninitialized\nsched_clkevt, leading to a kernel Oops when accessing\nsched_clkevt-\u003evalue.\n\nDeclare a dedicated clkevt instance exclusively for delay timer,\ninstead of sharing the same clkevt with sched_clock.  This ensures\nthat read_current_timer continues to work correctly regardless of\nwhether SP804 is selected as the sched_clock.",
  "id": "CVE-2026-46257",
  "modified": "2026-07-08T05:37:31.432605049Z",
  "published": "2026-06-03T15:49:54.286Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/693b0b594b0f278bafa784984129c0c0f988e352"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/694921a93f3e3621e067afc545cedf6fe3b234a9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46257.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46257"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "clocksource/drivers/timer-sp804: Fix an Oops when read_current_timer is called on ARM32 platforms where the SP804 is not registered as the sched_clock."
}