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CVE-2025-68231 (GCVE-0-2025-68231)

Vulnerability from cvelistv5 – Published: 2025-12-16 13:57 – Updated: 2026-05-11 21:49
VLAI
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 <f3> 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 poisoning code not dealing properly with CONFIG_HIGHMEM because only the first page is mapped but then the whole potentially high-order page is accessed. We could give up on HIGHMEM here, but it's straightforward to fix this with a loop that's mapping, poisoning or checking and unmapping individual pages.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6 , < ea4131665107e66ece90e66bcec1a2f1246cbd41 (git)
Affected: bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6 , < 19de79aaea33ee1ea058c8711b3b2b4a7e4decd4 (git)
Affected: bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6 , < 6a13b56537e7b0d97f4bb74e8038ce471f9770d7 (git)
Affected: bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6 , < a79e49e1704367b635edad1479db23d7cf1fb71a (git)
Affected: bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6 , < ec33b59542d96830e3c89845ff833cf7b25ef172 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.1
Unaffected: 0 , < 4.1 (semver)
Unaffected: 6.1.159 , ≤ 6.1.* (semver)
Unaffected: 6.6.118 , ≤ 6.6.* (semver)
Unaffected: 6.12.60 , ≤ 6.12.* (semver)
Unaffected: 6.17.10 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "product": "Linux",
          "programFiles": [
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              "status": "unaffected",
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              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mempool: fix poisoning order\u003e0 pages with HIGHMEM\n\nThe kernel test has reported:\n\n  BUG: unable to handle page fault for address: fffba000\n  #PF: supervisor write access in kernel mode\n  #PF: error_code(0x0002) - not-present page\n  *pde = 03171067 *pte = 00000000\n  Oops: Oops: 0002 [#1]\n  CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G                T   6.18.0-rc2-00031-gec7f31b2a2d3 #1 NONE  a1d066dfe789f54bc7645c7989957d2bdee593ca\n  Tainted: [T]=RANDSTRUCT\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\n  EIP: memset (arch/x86/include/asm/string_32.h:168 arch/x86/lib/memcpy_32.c:17)\n  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 \u003cf3\u003e aa 89 f0 5e 5f 5d 2e e9 53 41 01 00 cc cc cc 55 89 e5 53 57 56\n  EAX: 0000006b EBX: 00000015 ECX: 001fefff EDX: 0000006b\n  ESI: fffb9000 EDI: fffba000 EBP: c611fbf0 ESP: c611fbe8\n  DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010287\n  CR0: 80050033 CR2: fffba000 CR3: 0316e000 CR4: 00040690\n  Call Trace:\n   poison_element (mm/mempool.c:83 mm/mempool.c:102)\n   mempool_init_node (mm/mempool.c:142 mm/mempool.c:226)\n   mempool_init_noprof (mm/mempool.c:250 (discriminator 1))\n   ? mempool_alloc_pages (mm/mempool.c:640)\n   bio_integrity_initfn (block/bio-integrity.c:483 (discriminator 8))\n   ? mempool_alloc_pages (mm/mempool.c:640)\n   do_one_initcall (init/main.c:1283)\n\nChristoph found out this is due to the poisoning code not dealing\nproperly with CONFIG_HIGHMEM because only the first page is mapped but\nthen the whole potentially high-order page is accessed.\n\nWe could give up on HIGHMEM here, but it\u0027s straightforward to fix this\nwith a loop that\u0027s mapping, poisoning or checking and unmapping\nindividual pages."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:49:21.992Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/a79e49e1704367b635edad1479db23d7cf1fb71a"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec33b59542d96830e3c89845ff833cf7b25ef172"
        }
      ],
      "title": "mm/mempool: fix poisoning order\u003e0 pages with HIGHMEM",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-68231",
    "datePublished": "2025-12-16T13:57:23.712Z",
    "dateReserved": "2025-12-16T13:41:40.258Z",
    "dateUpdated": "2026-05-11T21:49:21.992Z",
    "state": "PUBLISHED"
  },
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      "date": "2026-09-16",
      "epss": "0.00186",
      "percentile": "0.08416"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-68231\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-16T14:15:57.473\",\"lastModified\":\"2026-06-17T09:58:46.463\",\"vulnStatus\":\"Deferred\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm/mempool: fix poisoning order\u003e0 pages with HIGHMEM\\n\\nThe kernel test has reported:\\n\\n  BUG: unable to handle page fault for address: fffba000\\n  #PF: supervisor write access in kernel mode\\n  #PF: error_code(0x0002) - not-present page\\n  *pde = 03171067 *pte = 00000000\\n  Oops: Oops: 0002 [#1]\\n  CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Tainted: G                T   6.18.0-rc2-00031-gec7f31b2a2d3 #1 NONE  a1d066dfe789f54bc7645c7989957d2bdee593ca\\n  Tainted: [T]=RANDSTRUCT\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\n  EIP: memset (arch/x86/include/asm/string_32.h:168 arch/x86/lib/memcpy_32.c:17)\\n  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 \u003cf3\u003e aa 89 f0 5e 5f 5d 2e e9 53 41 01 00 cc cc cc 55 89 e5 53 57 56\\n  EAX: 0000006b EBX: 00000015 ECX: 001fefff EDX: 0000006b\\n  ESI: fffb9000 EDI: fffba000 EBP: c611fbf0 ESP: c611fbe8\\n  DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00010287\\n  CR0: 80050033 CR2: fffba000 CR3: 0316e000 CR4: 00040690\\n  Call Trace:\\n   poison_element (mm/mempool.c:83 mm/mempool.c:102)\\n   mempool_init_node (mm/mempool.c:142 mm/mempool.c:226)\\n   mempool_init_noprof (mm/mempool.c:250 (discriminator 1))\\n   ? mempool_alloc_pages (mm/mempool.c:640)\\n   bio_integrity_initfn (block/bio-integrity.c:483 (discriminator 8))\\n   ? mempool_alloc_pages (mm/mempool.c:640)\\n   do_one_initcall (init/main.c:1283)\\n\\nChristoph found out this is due to the poisoning code not dealing\\nproperly with CONFIG_HIGHMEM because only the first page is mapped but\\nthen the whole potentially high-order page is accessed.\\n\\nWe could give up on HIGHMEM here, but it\u0027s straightforward to fix this\\nwith a loop that\u0027s mapping, poisoning or checking and unmapping\\nindividual pages.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"mm/mempool.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6\",\"lessThan\":\"ea4131665107e66ece90e66bcec1a2f1246cbd41\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6\",\"lessThan\":\"19de79aaea33ee1ea058c8711b3b2b4a7e4decd4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6\",\"lessThan\":\"6a13b56537e7b0d97f4bb74e8038ce471f9770d7\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6\",\"lessThan\":\"a79e49e1704367b635edad1479db23d7cf1fb71a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"bdfedb76f4f5aa5e37380e3b71adee4a39f30fc6\",\"lessThan\":\"ec33b59542d96830e3c89845ff833cf7b25ef172\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"mm/mempool.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.1\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.1\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.159\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.118\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.60\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17.10\",\"lessThanOrEqual\":\"6.17.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/19de79aaea33ee1ea058c8711b3b2b4a7e4decd4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6a13b56537e7b0d97f4bb74e8038ce471f9770d7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a79e49e1704367b635edad1479db23d7cf1fb71a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ea4131665107e66ece90e66bcec1a2f1246cbd41\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ec33b59542d96830e3c89845ff833cf7b25ef172\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:33:45+00:00",
      "cve": "CVE-2025-68231",
      "id": "CVE-2025-68231",
      "initial_release_date": "2025-12-16T00:00:00+00:00",
      "product_status:known_affected": "246",
      "product_status:known_not_affected": "28",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mm/mempool: fix poisoning order\u003e0 pages with HIGHMEM",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-68231.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-28T16:50:07Z",
      "cve": "CVE-2025-68231",
      "id": "CVE-2025-68231",
      "initial_release_date": "2025-12-17T00:24:52Z",
      "product_status:known_affected": "490",
      "product_status:known_not_affected": "6",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-68231",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-68231.json",
      "version": "21"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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