{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2025-38723",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2025-38723"
  ],
  "published": "2025-09-04T15:33:55Z",
  "summary": "LoongArch: BPF: Fix jump offset calculation in tailcall",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: BPF: Fix jump offset calculation in tailcall\n\nThe extra pass of bpf_int_jit_compile() skips JIT context initialization\nwhich essentially skips offset calculation leaving out_offset = -1, so\nthe jmp_offset in emit_bpf_tail_call is calculated by\n\n\"#define jmp_offset (out_offset - (cur_offset))\"\n\nis a negative number, which is wrong. The final generated assembly are\nas follow.\n\n54:\tbgeu        \t$a2, $t1, -8\t    # 0x0000004c\n58:\taddi.d      \t$a6, $s5, -1\n5c:\tbltz        \t$a6, -16\t    # 0x0000004c\n60:\talsl.d      \t$t2, $a2, $a1, 0x3\n64:\tld.d        \t$t2, $t2, 264\n68:\tbeq         \t$t2, $zero, -28\t    # 0x0000004c\n\nBefore apply this patch, the follow test case will reveal soft lock issues.\n\ncd tools/testing/selftests/bpf/\n./test_progs --allow=tailcalls/tailcall_bpf2bpf_1\n\ndmesg:\nwatchdog: BUG: soft lockup - CPU#2 stuck for 26s! [test_progs:25056]",
  "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": "6.1.149",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2025-38723"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1a782fa32e644aa9fbae6c8488f3e61221ac96e1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/17c010fe45def335fe03a0718935416b04c7f349"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f83d469e16bb1f75991ca67c56786fb2aaa42bea"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f2b5e50cc04d7a049b385bc1c93b9cbf5f10c94f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9262e3e04621558e875eb5afb5e726b648cd5949"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cd39d9e6b7e4c58fa77783e7aedf7ada51d02ea3"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
  }
}