powerpc/code-patching: Fix KASAN hit by not flagging text patching area as VM_ALLOC

{
  "id": "90aa71ed81f5633eefa19c6cd7845e67a576df5c52ac3665d1bf590b678e64d5",
  "url": "https://osv.dev/vulnerability/CVE-2025-21866",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "powerpc/code-patching: Fix KASAN hit by not flagging text patching area as VM_ALLOC",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: powerpc/code-patching: Fix KASAN hit by not flagging text patching area as VM_ALLOC Erhard reported the following KASAN hit while booting his PowerMac G4 with a KASAN-enabled kernel 6.13-rc6: BUG: KASAN: vmalloc-out-of-bounds in copy_to_kernel_nofault+0xd8/0x1c8 Write of size 8 at addr f1000000 by task chronyd/1293 CPU: 0 UID: 123 PID: 1293 Comm: chronyd Tainted: G W 6.13.0-rc6-PMacG4 #2 Tainted: [W]=WARN Hardware name: PowerMac3,6 7455 0x80010303 PowerMac Call Trace: [c2437590] [c1631a84] dump_stack_lvl+0x70/0x8c (unreliable) [c24375b0] [c0504998] print_report+0xdc/0x504 [c2437610] [c050475c] kasan_report+0xf8/0x108 [c2437690] [c0505a3c] kasan_check_range+0x24/0x18c [c24376a0] [c03fb5e4] copy_to_kernel_nofault+0xd8/0x1c8 [c24376c0] [c004c014] patch_instructions+0x15c/0x16c [c2437710] [c00731a8] bpf_arch_text_copy+0x60/0x7c [c2437730] [c0281168] bpf_jit_binary_pack_finalize+0x50/0xac [c2437750] [c0073cf4] bpf_int_jit_compile+0xb30/0xdec [c2437880] [c0280394] bpf_prog_select_runtime+0x15c/0x478 [c24378d0] [c1263428] bpf_prepare_filter+0xbf8/0xc14 [c2437990] [c12677ec] bpf_prog_create_from_user+0x258/0x2b4 [c24379d0] [c027111c] do_seccomp+0x3dc/0x1890 [c2437ac0] [c001d8e0] system_call_exception+0x2dc/0x420 [c2437f30] [c00281ac] ret_from_syscall+0x0/0x2c --- interrupt: c00 at 0x5a1274 NIP: 005a1274 LR: 006a3b3c CTR: 005296c8 REGS: c2437f40 TRAP: 0c00 Tainted: G W (6.13.0-rc6-PMacG4) MSR: 0200f932 CR: 24004422 XE",
    "evidence": "osv:CVE-2025-21866",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.291",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.10.235",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "5.15.179",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.130",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.80",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.17",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.5",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2025-21866",
      "aliases": [
        "CVE-2025-21866"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "37bc3e5fd764fb258ff4fcbb90b6d1b67fb466c1"
                },
                {
                  "fixed": "97de5852058a299ba447cd9782fe96488d30108b"
                },
                {
                  "fixed": "f8d4c5b653c1bc0df56e15658bbf64fc359adc4e"
                },
                {
                  "fixed": "6847b3e40bb963e57b61d1cc6fe84cb37b9d3d4c"
                },
                {
                  "fixed": "c905a3053518212a1017e50bd2be3bee59305bb0"
                },
                {
                  "fixed": "2d542f13d26344e3452eee77613026ce9b653065"
                },
                {
                  "fixed": "8d06e9208184b2851fa79a3a39d6860320c8bdf8"
                },
                {
                  "fixed": "2e6c80423f201405fd65254e52decd21663896f3"
                },
                {
                  "fixed": "d262a192d38e527faa5984629aabda2e0d1c4f54"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21866.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.13.0"
                },
                {
                  "fixed": "5.4.291"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.5.0"
                },
                {
                  "fixed": "5.10.235"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.11.0"
                },
                {
                  "fixed": "5.15.179"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.130"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.80"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.17"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.5"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-21866.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.161027550Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/2d542f13d26344e3452eee77613026ce9b653065",
        "https://git.kernel.org/stable/c/2e6c80423f201405fd65254e52decd21663896f3",
        "https://git.kernel.org/stable/c/6847b3e40bb963e57b61d1cc6fe84cb37b9d3d4c",
        "https://git.kernel.org/stable/c/8d06e9208184b2851fa79a3a39d6860320c8bdf8",
        "https://git.kernel.org/stable/c/97de5852058a299ba447cd9782fe96488d30108b",
        "https://git.kernel.org/stable/c/c905a3053518212a1017e50bd2be3bee59305bb0",
        "https://git.kernel.org/stable/c/d262a192d38e527faa5984629aabda2e0d1c4f54",
        "https://git.kernel.org/stable/c/f8d4c5b653c1bc0df56e15658bbf64fc359adc4e",
        "https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21866.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-21866",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21866.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-21866",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518213,
  "published_at": "2025-03-12T09:42:22.587+00:00"
}