{
  "cveId": "CVE-2023-54039",
  "url": "https://patchblox.com/security/cve/CVE-2023-54039",
  "summary": "CVE-2023-54039 is fixed in linux on 1 platform, first by DEBIAN-CVE-2023-54039, released December 24, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  can: j1939: j1939_tp_tx_dat_new(): fix out-of-bo...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  can: j1939: j1939_tp_tx_dat_new(): fix out-of-bounds memory access  In the j1939_tp_tx_dat_new() function, an out-of-bounds memory access could occur during the memcpy() operation if the size of skb-\u003Ecb is larger than the size of struct j1939_sk_buff_cb. This is because the memcpy() operation uses the size of skb-\u003Ecb, leading to a read beyond the struct j1939_sk_buff_cb.  Updated the memcpy() operation to use the size of struct j1939_sk_buff_cb instead of the size of skb-\u003Ecb. This ensures that the memcpy() operation only reads the memory within the bounds of struct j1939_sk_buff_cb, preventing out-of-bounds memory access.  Additionally, add a BUILD_BUG_ON() to check that the size of skb-\u003Ecb is greater than or equal to the size of struct j1939_sk_buff_cb. This ensures that the skb-\u003Ecb buffer is large enough to hold the j1939_sk_buff_cb structure.  [mkl: rephrase commit message]",
  "published": "2025-12-24T11:15:56Z",
  "severity": "",
  "epss": 0.00192,
  "epssPercentile": 0.08882,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.25-1",
      "fix": "DEBIAN-CVE-2023-54039",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-54039",
      "released": "2025-12-24T11:15:56Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.1.25-1",
      "fix": "DEBIAN-CVE-2023-54039",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-54039",
      "released": "2025-12-24T11:15:56Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.1.25-1",
      "fix": "DEBIAN-CVE-2023-54039",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2023-54039",
      "released": "2025-12-24T11:15:56Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}