mm/mempool: fix poisoning order>0 pages with HIGHMEM

{
  "id": "d5872a7efb3204c6ad6906fda2cb0e9a0b25dab7f174f96f71643e12a45dd2f9",
  "url": "https://osv.dev/vulnerability/CVE-2025-68231",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mm/mempool: fix poisoning order>0 pages with HIGHMEM",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: mm/mempool: fix poisoning order>0 pages with HIGHMEM The kernel test has reported: BUG: unable to handle page fault for address: fffba000 #PF: supervisor write access in kernel mode #PF: error_code(0x0002) - not-present page *pde = 03171067 *pte = 00000000 Oops: Oops: 0002 [#1] CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G T 6.18.0-rc2-00031-gec7f31b2a2d3 #1 NONE a1d066dfe789f54bc7645c7989957d2bdee593ca Tainted: [T]=RANDSTRUCT Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 EIP: memset (arch/x86/include/asm/string_32.h:168 arch/x86/lib/memcpy_32.c:17) Code: a5 8b 4d f4 83 e1 03 74 02 f3 a4 83 c4 04 5e 5f 5d 2e e9 73 41 01 00 90 90 90 3e 8d 74 26 00 55 89 e5 57 56 89 c6 89 d0 89 f7 aa 89 f0 5e 5f 5d 2e e9 53 41 01 00 cc cc cc 55 89 e5 53 57 56 EAX: 0000006b EBX: 00000015 ECX: 001fefff EDX: 0000006b ESI: fffb9000 EDI: fffba000 EBP: c611fbf0 ESP: c611fbe8 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010287 CR0: 80050033 CR2: fffba000 CR3: 0316e000 CR4: 00040690 Call Trace: poison_element (mm/mempool.c:83 mm/mempool.c:102) mempool_init_node (mm/mempool.c:142 mm/mempool.c:226) mempool_init_noprof (mm/mempool.c:250 (discriminator 1)) ? mempool_alloc_pages (mm/mempool.c:640) bio_integrity_initfn (block/bio-integrity.c:483 (discriminator 8)) ? mempool_alloc_pages (mm/mempool.c:640) do_one_initcall (init/main.c:1283) Christoph found out this is due to the poiso",
    "evidence": "osv:CVE-2025-68231",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.159",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.118",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.60",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.17.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-68231",
      "aliases": [
        "CVE-2025-68231"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6"
                },
                {
                  "fixed": "ea4131665107e66ece90e66bcec1a2f1246cbd41"
                },
                {
                  "fixed": "19de79aaea33ee1ea058c8711b3b2b4a7e4decd4"
                },
                {
                  "fixed": "6a13b56537e7b0d97f4bb74e8038ce471f9770d7"
                },
                {
                  "fixed": "a79e49e1704367b635edad1479db23d7cf1fb71a"
                },
                {
                  "fixed": "ec33b59542d96830e3c89845ff833cf7b25ef172"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68231.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "4.1.0"
                },
                {
                  "fixed": "6.1.159"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.118"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.60"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.17.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-68231.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:39.032537846Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/19de79aaea33ee1ea058c8711b3b2b4a7e4decd4",
        "https://git.kernel.org/stable/c/6a13b56537e7b0d97f4bb74e8038ce471f9770d7",
        "https://git.kernel.org/stable/c/a79e49e1704367b635edad1479db23d7cf1fb71a",
        "https://git.kernel.org/stable/c/ea4131665107e66ece90e66bcec1a2f1246cbd41",
        "https://git.kernel.org/stable/c/ec33b59542d96830e3c89845ff833cf7b25ef172",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68231.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-68231",
        "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/2025/68xxx/CVE-2025-68231.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-68231",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 506412,
  "published_at": "2025-12-16T13:57:23.712+00:00"
}