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CVE-2024-40948 (GCVE-0-2024-40948)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:31 – Updated: 2026-05-11 20:22
VLAI
Title
mm/page_table_check: fix crash on ZONE_DEVICE
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/page_table_check: fix crash on ZONE_DEVICE Not all pages may apply to pgtable check. One example is ZONE_DEVICE pages: they map PFNs directly, and they don't allocate page_ext at all even if there's struct page around. One may reference devm_memremap_pages(). When both ZONE_DEVICE and page-table-check enabled, then try to map some dax memories, one can trigger kernel bug constantly now when the kernel was trying to inject some pfn maps on the dax device: kernel BUG at mm/page_table_check.c:55! While it's pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page fault resolutions, skip all the checks if page_ext doesn't even exist in pgtable checker, which applies to ZONE_DEVICE but maybe more.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:04 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: df4e817b710809425d899340dbfa8504a3ca4ba5 , < 51897f99351fff7b57f4f141940fa93b4e90fd2b (git)
Affected: df4e817b710809425d899340dbfa8504a3ca4ba5 , < 84d3549d54f5ff9fa3281257be3019386f51d1a0 (git)
Affected: df4e817b710809425d899340dbfa8504a3ca4ba5 , < dec2382247860d2134c8d41e103e26460c099629 (git)
Affected: df4e817b710809425d899340dbfa8504a3ca4ba5 , < 8bb592c2eca8fd2bc06db7d80b38da18da4a2f43 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.17
Unaffected: 0 , < 5.17 (semver)
Unaffected: 6.1.96 , ≤ 6.1.* (semver)
Unaffected: 6.6.36 , ≤ 6.6.* (semver)
Unaffected: 6.9.7 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "initial_release_date": "2024-07-12T00:00:00+00:00",
      "product_status:fixed": "280",
      "product_status:known_affected": "64",
      "product_status:known_not_affected": "56",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: mm/page_table_check: fix crash on ZONE_DEVICE",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-40948.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-30T02:31:32Z",
      "cve": "CVE-2024-40948",
      "id": "CVE-2024-40948",
      "initial_release_date": "2024-07-16T02:34:28Z",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "362",
      "product_status:recommended": "353",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-40948",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-40948.json",
      "version": "75"
    },
    "vulnrichment": {
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One example is ZONE_DEVICE\\npages: they map PFNs directly, and they don\u0027t allocate page_ext at all\\neven if there\u0027s struct page around.  One may reference\\ndevm_memremap_pages().\\n\\nWhen both ZONE_DEVICE and page-table-check enabled, then try to map some\\ndax memories, one can trigger kernel bug constantly now when the kernel\\nwas trying to inject some pfn maps on the dax device:\\n\\n kernel BUG at mm/page_table_check.c:55!\\n\\nWhile it\u0027s pretty legal to use set_pxx_at() for ZONE_DEVICE pages for page\\nfault resolutions, skip all the checks if page_ext doesn\u0027t even exist in\\npgtable checker, which applies to ZONE_DEVICE but maybe more.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.96\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.36\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.7\", \"versionStartIncluding\": \"5.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"5.17\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:18:34.368Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-40948\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:18:34.368Z\", \"dateReserved\": \"2024-07-12T12:17:45.591Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-12T12:31:53.478Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.