Vulnerability-Lookup

GHSA-5MFC-RX34-WGRH

Vulnerability from github – Published: 2025-06-18 12:30 – Updated: 2025-11-14 18:31

Details

In the Linux kernel, the following vulnerability has been resolved:

mm/mprotect: only reference swap pfn page if type match

Yu Zhao reported a bug after the commit "mm/swap: Add swp_offset_pfn() to fetch PFN from swap entry" added a check in swp_offset_pfn() for swap type [1]:

kernel BUG at include/linux/swapops.h:117! CPU: 46 PID: 5245 Comm: EventManager_De Tainted: G S O L 6.0.0-dbg-DEV #2 RIP: 0010:pfn_swap_entry_to_page+0x72/0xf0 Code: c6 48 8b 36 48 83 fe ff 74 53 48 01 d1 48 83 c1 08 48 8b 09 f6 c1 01 75 7b 66 90 48 89 c1 48 8b 09 f6 c1 01 74 74 5d c3 eb 9e <0f> 0b 48 ba ff ff ff ff 03 00 00 00 eb ae a9 ff 0f 00 00 75 13 48 RSP: 0018:ffffa59e73fabb80 EFLAGS: 00010282 RAX: 00000000ffffffe8 RBX: 0c00000000000000 RCX: ffffcd5440000000 RDX: 1ffffffffff7a80a RSI: 0000000000000000 RDI: 0c0000000000042b RBP: ffffa59e73fabb80 R08: ffff9965ca6e8bb8 R09: 0000000000000000 R10: ffffffffa5a2f62d R11: 0000030b372e9fff R12: ffff997b79db5738 R13: 000000000000042b R14: 0c0000000000042b R15: 1ffffffffff7a80a FS: 00007f549d1bb700(0000) GS:ffff99d3cf680000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000440d035b3180 CR3: 0000002243176004 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: change_pte_range+0x36e/0x880 change_p4d_range+0x2e8/0x670 change_protection_range+0x14e/0x2c0 mprotect_fixup+0x1ee/0x330 do_mprotect_pkey+0x34c/0x440 __x64_sys_mprotect+0x1d/0x30

It triggers because pfn_swap_entry_to_page() could be called upon e.g. a genuine swap entry.

Fix it by only calling it when it's a write migration entry where the page* is used.

[1] https://lore.kernel.org/lkml/CAOUHufaVC2Za-p8m0aiHw6YkheDcrO-C3wRGixwDS32VTS+k1w@mail.gmail.com/

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49992"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-06-18T11:15:26Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mprotect: only reference swap pfn page if type match\n\nYu Zhao reported a bug after the commit \"mm/swap: Add swp_offset_pfn() to\nfetch PFN from swap entry\" added a check in swp_offset_pfn() for swap type [1]:\n\n  kernel BUG at include/linux/swapops.h:117!\n  CPU: 46 PID: 5245 Comm: EventManager_De Tainted: G S         O L 6.0.0-dbg-DEV #2\n  RIP: 0010:pfn_swap_entry_to_page+0x72/0xf0\n  Code: c6 48 8b 36 48 83 fe ff 74 53 48 01 d1 48 83 c1 08 48 8b 09 f6\n  c1 01 75 7b 66 90 48 89 c1 48 8b 09 f6 c1 01 74 74 5d c3 eb 9e \u003c0f\u003e 0b\n  48 ba ff ff ff ff 03 00 00 00 eb ae a9 ff 0f 00 00 75 13 48\n  RSP: 0018:ffffa59e73fabb80 EFLAGS: 00010282\n  RAX: 00000000ffffffe8 RBX: 0c00000000000000 RCX: ffffcd5440000000\n  RDX: 1ffffffffff7a80a RSI: 0000000000000000 RDI: 0c0000000000042b\n  RBP: ffffa59e73fabb80 R08: ffff9965ca6e8bb8 R09: 0000000000000000\n  R10: ffffffffa5a2f62d R11: 0000030b372e9fff R12: ffff997b79db5738\n  R13: 000000000000042b R14: 0c0000000000042b R15: 1ffffffffff7a80a\n  FS:  00007f549d1bb700(0000) GS:ffff99d3cf680000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000440d035b3180 CR3: 0000002243176004 CR4: 00000000003706e0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003cTASK\u003e\n   change_pte_range+0x36e/0x880\n   change_p4d_range+0x2e8/0x670\n   change_protection_range+0x14e/0x2c0\n   mprotect_fixup+0x1ee/0x330\n   do_mprotect_pkey+0x34c/0x440\n   __x64_sys_mprotect+0x1d/0x30\n\nIt triggers because pfn_swap_entry_to_page() could be called upon e.g. a\ngenuine swap entry.\n\nFix it by only calling it when it\u0027s a write migration entry where the page*\nis used.\n\n[1] https://lore.kernel.org/lkml/CAOUHufaVC2Za-p8m0aiHw6YkheDcrO-C3wRGixwDS32VTS+k1w@mail.gmail.com/",
  "id": "GHSA-5mfc-rx34-wgrh",
  "modified": "2025-11-14T18:31:23Z",
  "published": "2025-06-18T12:30:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49992"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d2f78f08cd8388035ac375e731ec1ac1b79b09d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5fcf81e308d1f4ae95f31690d2a80b7061385ff9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49992 (GCVE-0-2022-49992)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:00 – Updated: 2026-05-11 19:10

Title

mm/mprotect: only reference swap pfn page if type match

Summary

In the Linux kernel, the following vulnerability has been resolved: mm/mprotect: only reference swap pfn page if type match Yu Zhao reported a bug after the commit "mm/swap: Add swp_offset_pfn() to fetch PFN from swap entry" added a check in swp_offset_pfn() for swap type [1]: kernel BUG at include/linux/swapops.h:117! CPU: 46 PID: 5245 Comm: EventManager_De Tainted: G S O L 6.0.0-dbg-DEV #2 RIP: 0010:pfn_swap_entry_to_page+0x72/0xf0 Code: c6 48 8b 36 48 83 fe ff 74 53 48 01 d1 48 83 c1 08 48 8b 09 f6 c1 01 75 7b 66 90 48 89 c1 48 8b 09 f6 c1 01 74 74 5d c3 eb 9e <0f> 0b 48 ba ff ff ff ff 03 00 00 00 eb ae a9 ff 0f 00 00 75 13 48 RSP: 0018:ffffa59e73fabb80 EFLAGS: 00010282 RAX: 00000000ffffffe8 RBX: 0c00000000000000 RCX: ffffcd5440000000 RDX: 1ffffffffff7a80a RSI: 0000000000000000 RDI: 0c0000000000042b RBP: ffffa59e73fabb80 R08: ffff9965ca6e8bb8 R09: 0000000000000000 R10: ffffffffa5a2f62d R11: 0000030b372e9fff R12: ffff997b79db5738 R13: 000000000000042b R14: 0c0000000000042b R15: 1ffffffffff7a80a FS: 00007f549d1bb700(0000) GS:ffff99d3cf680000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000440d035b3180 CR3: 0000002243176004 CR4: 00000000003706e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> change_pte_range+0x36e/0x880 change_p4d_range+0x2e8/0x670 change_protection_range+0x14e/0x2c0 mprotect_fixup+0x1ee/0x330 do_mprotect_pkey+0x34c/0x440 __x64_sys_mprotect+0x1d/0x30 It triggers because pfn_swap_entry_to_page() could be called upon e.g. a genuine swap entry. Fix it by only calling it when it's a write migration entry where the page* is used. [1] https://lore.kernel.org/lkml/CAOUHufaVC2Za-p8m0aiHw6YkheDcrO-C3wRGixwDS32VTS+k1w@mail.gmail.com/

Severity

No CVSS data available.

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/5fcf81e308d1f4ae9…
https://git.kernel.org/stable/c/3d2f78f08cd838803…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 6c287605fd56466e645693eff3ae7c08fba56e0a , < 5fcf81e308d1f4ae95f31690d2a80b7061385ff9 (git) Affected: 6c287605fd56466e645693eff3ae7c08fba56e0a , < 3d2f78f08cd8388035ac375e731ec1ac1b79b09d (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 5.19.6 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/mprotect.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5fcf81e308d1f4ae95f31690d2a80b7061385ff9",
              "status": "affected",
              "version": "6c287605fd56466e645693eff3ae7c08fba56e0a",
              "versionType": "git"
            },
            {
              "lessThan": "3d2f78f08cd8388035ac375e731ec1ac1b79b09d",
              "status": "affected",
              "version": "6c287605fd56466e645693eff3ae7c08fba56e0a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "mm/mprotect.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.19.*",
              "status": "unaffected",
              "version": "5.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19.6",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/mprotect: only reference swap pfn page if type match\n\nYu Zhao reported a bug after the commit \"mm/swap: Add swp_offset_pfn() to\nfetch PFN from swap entry\" added a check in swp_offset_pfn() for swap type [1]:\n\n  kernel BUG at include/linux/swapops.h:117!\n  CPU: 46 PID: 5245 Comm: EventManager_De Tainted: G S         O L 6.0.0-dbg-DEV #2\n  RIP: 0010:pfn_swap_entry_to_page+0x72/0xf0\n  Code: c6 48 8b 36 48 83 fe ff 74 53 48 01 d1 48 83 c1 08 48 8b 09 f6\n  c1 01 75 7b 66 90 48 89 c1 48 8b 09 f6 c1 01 74 74 5d c3 eb 9e \u003c0f\u003e 0b\n  48 ba ff ff ff ff 03 00 00 00 eb ae a9 ff 0f 00 00 75 13 48\n  RSP: 0018:ffffa59e73fabb80 EFLAGS: 00010282\n  RAX: 00000000ffffffe8 RBX: 0c00000000000000 RCX: ffffcd5440000000\n  RDX: 1ffffffffff7a80a RSI: 0000000000000000 RDI: 0c0000000000042b\n  RBP: ffffa59e73fabb80 R08: ffff9965ca6e8bb8 R09: 0000000000000000\n  R10: ffffffffa5a2f62d R11: 0000030b372e9fff R12: ffff997b79db5738\n  R13: 000000000000042b R14: 0c0000000000042b R15: 1ffffffffff7a80a\n  FS:  00007f549d1bb700(0000) GS:ffff99d3cf680000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000440d035b3180 CR3: 0000002243176004 CR4: 00000000003706e0\n  DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n  DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n  Call Trace:\n   \u003cTASK\u003e\n   change_pte_range+0x36e/0x880\n   change_p4d_range+0x2e8/0x670\n   change_protection_range+0x14e/0x2c0\n   mprotect_fixup+0x1ee/0x330\n   do_mprotect_pkey+0x34c/0x440\n   __x64_sys_mprotect+0x1d/0x30\n\nIt triggers because pfn_swap_entry_to_page() could be called upon e.g. a\ngenuine swap entry.\n\nFix it by only calling it when it\u0027s a write migration entry where the page*\nis used.\n\n[1] https://lore.kernel.org/lkml/CAOUHufaVC2Za-p8m0aiHw6YkheDcrO-C3wRGixwDS32VTS+k1w@mail.gmail.com/"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:10:37.940Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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        {
          "url": "https://git.kernel.org/stable/c/5fcf81e308d1f4ae95f31690d2a80b7061385ff9"
        },
        {
          "url": "https://git.kernel.org/stable/c/3d2f78f08cd8388035ac375e731ec1ac1b79b09d"
        }
      ],
      "title": "mm/mprotect: only reference swap pfn page if type match",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49992",
    "datePublished": "2025-06-18T11:00:52.581Z",
    "dateReserved": "2025-06-18T10:57:27.387Z",
    "dateUpdated": "2026-05-11T19:10:37.940Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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