{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/clocksource/timer-sp804.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "693b0b594b0f278bafa784984129c0c0f988e352",
              "status": "affected",
              "version": "640594a04f119338019b0aeed70c7301216595b3",
              "versionType": "git"
            },
            {
              "lessThan": "694921a93f3e3621e067afc545cedf6fe3b234a9",
              "status": "affected",
              "version": "640594a04f119338019b0aeed70c7301216595b3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/clocksource/timer-sp804.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.19"
            },
            {
              "lessThan": "6.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-03T15:49:54.286Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/693b0b594b0f278bafa784984129c0c0f988e352"
        },
        {
          "url": "https://git.kernel.org/stable/c/694921a93f3e3621e067afc545cedf6fe3b234a9"
        }
      ],
      "title": "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.",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46257",
    "datePublished": "2026-06-03T15:49:54.286Z",
    "dateReserved": "2026-05-13T15:03:33.108Z",
    "dateUpdated": "2026-06-03T15:49:54.286Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-46257\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-03T18:16:26.733\",\"lastModified\":\"2026-06-03T18:16:26.733\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/693b0b594b0f278bafa784984129c0c0f988e352\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/694921a93f3e3621e067afc545cedf6fe3b234a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}