{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2023-52633",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2023-52633"
  ],
  "published": "2024-04-02T06:49:49Z",
  "summary": "um: time-travel: fix time corruption",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\num: time-travel: fix time corruption\n\nIn 'basic' time-travel mode (without =inf-cpu or =ext), we\nstill get timer interrupts. These can happen at arbitrary\npoints in time, i.e. while in timer_read(), which pushes\ntime forward just a little bit. Then, if we happen to get\nthe interrupt after calculating the new time to push to,\nbut before actually finishing that, the interrupt will set\nthe time to a value that's incompatible with the forward,\nand we'll crash because time goes backwards when we do the\nforwarding.\n\nFix this by reading the time_travel_time, calculating the\nadjustment, and doing the adjustment all with interrupts\ndisabled.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.77",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2023-52633"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0c7478a2da3f5fe106b4658338873d50c86ac7ab"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/4f7dad73df4cdb2b7042103d3922745d040ad025"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/de3e9d8e8d1ae0a4d301109d1ec140796901306c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b427f55e9d4185f6f17cc1e3296eb8d0c4425283"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/abe4eaa8618bb36c2b33e9cdde0499296a23448c"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}