{
  "cveId": "CVE-2025-38723",
  "url": "https://patchblox.com/security/cve/CVE-2025-38723",
  "summary": "CVE-2025-38723 is fixed in linux on 1 platform, first by DEBIAN-CVE-2025-38723, released September 4, 2025. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "LoongArch: BPF: Fix jump offset calculation in tailcall",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  LoongArch: BPF: Fix jump offset calculation in tailcall  The extra pass of bpf_int_jit_compile() skips JIT context initialization which essentially skips offset calculation leaving out_offset = -1, so the jmp_offset in emit_bpf_tail_call is calculated by  \u0022#define jmp_offset (out_offset - (cur_offset))\u0022  is a negative number, which is wrong. The final generated assembly are as follow.  54:\tbgeu        \t$a2, $t1, -8\t    # 0x0000004c 58:\taddi.d      \t$a6, $s5, -1 5c:\tbltz        \t$a6, -16\t    # 0x0000004c 60:\talsl.d      \t$t2, $a2, $a1, 0x3 64:\tld.d        \t$t2, $t2, 264 68:\tbeq         \t$t2, $zero, -28\t    # 0x0000004c  Before apply this patch, the follow test case will reveal soft lock issues.  cd tools/testing/selftests/bpf/ ./test_progs --allow=tailcalls/tailcall_bpf2bpf_1  dmesg: watchdog: BUG: soft lockup - CPU#2 stuck for 26s! [test_progs:25056]",
  "published": "2025-09-04T16:15:42Z",
  "severity": "medium",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00174,
  "epssPercentile": 0.06917,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-38723",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.153-1",
      "fix": "DEBIAN-CVE-2025-38723",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-38723",
      "released": "2025-09-04T16:15:42Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.43-1",
      "fix": "DEBIAN-CVE-2025-38723",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-38723",
      "released": "2025-09-04T16:15:42Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.16.3-1",
      "fix": "DEBIAN-CVE-2025-38723",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2025-38723",
      "released": "2025-09-04T16:15:42Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}