Vulnerability-Lookup

FKIE_CVE-2026-68473

Vulnerability from fkie_nvd - Published: 2026-08-15 06:20 - Updated: 2026-08-17 06:17

Severity

7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address() mask_user_address() incorrectly checks for CONFIG_E500 instead of CONFIG_PPC_E500, causing mask_user_address_isel() to not be used on E500 hardware. Fix the check to use the correct name.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d5c234774a82f27b594f70c15fc45ce3648e4295
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d610d3ab18197d87618da11ec5fe8b3cebf32208

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/uaccess.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d5c234774a82f27b594f70c15fc45ce3648e4295",
              "status": "affected",
              "version": "861574d51bbd7a06dbf07f658a9a8def012c2f74",
              "versionType": "git"
            },
            {
              "lessThan": "d610d3ab18197d87618da11ec5fe8b3cebf32208",
              "status": "affected",
              "version": "861574d51bbd7a06dbf07f658a9a8def012c2f74",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/uaccess.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()\n\nmask_user_address() incorrectly checks for CONFIG_E500 instead of\nCONFIG_PPC_E500, causing mask_user_address_isel() to not be used on\nE500 hardware. Fix the check to use the correct name."
    }
  ],
  "id": "CVE-2026-68473",
  "lastModified": "2026-08-17T06:17:56.737",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-15T06:20:29.240",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d5c234774a82f27b594f70c15fc45ce3648e4295"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d610d3ab18197d87618da11ec5fe8b3cebf32208"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-68473 (GCVE-0-2026-68473)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:51 – Updated: 2026-08-17 05:39

Title

powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()

Summary

Severity

7.8 (High)


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

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/d5c234774a82f27b5…
https://git.kernel.org/stable/c/d610d3ab18197d876…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 861574d51bbd7a06dbf07f658a9a8def012c2f74 , < d5c234774a82f27b594f70c15fc45ce3648e4295 (git) Affected: 861574d51bbd7a06dbf07f658a9a8def012c2f74 , < d610d3ab18197d87618da11ec5fe8b3cebf32208 (git)
Linux	Linux	Affected: 7.0 Unaffected: 0 , < 7.0 (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/uaccess.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d5c234774a82f27b594f70c15fc45ce3648e4295",
              "status": "affected",
              "version": "861574d51bbd7a06dbf07f658a9a8def012c2f74",
              "versionType": "git"
            },
            {
              "lessThan": "d610d3ab18197d87618da11ec5fe8b3cebf32208",
              "status": "affected",
              "version": "861574d51bbd7a06dbf07f658a9a8def012c2f74",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/include/asm/uaccess.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.0"
            },
            {
              "lessThan": "7.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "7.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()\n\nmask_user_address() incorrectly checks for CONFIG_E500 instead of\nCONFIG_PPC_E500, causing mask_user_address_isel() to not be used on\nE500 hardware. Fix the check to use the correct name."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Exploitation requires invoking local syscalls (read/write/ioctl/futex/socket) that reach masked uaccess helpers; the bug is in arch/powerpc uaccess.h and is not triggered by remote packet handling alone.\nAC:L - On affected PPC_E500 kernels (7.0+), any user pointer with bit 31 set reliably redirects to 0x80000000 on masked copy/futex paths without races or rare layout wins.\nPR:L - Any unprivileged local process can pass crafted userspace pointers into copy_from_user, strncpy_from_user, iov_iter, futex_wake_op, and scoped socket/scm helpers that use masked_user_access_begin.\nUI:N - No victim interaction is required; exploitation is achieved entirely through attacker-controlled syscall arguments and memory mappings.\nS:U - Impact is confined to kernel/user memory boundaries on the same host (cross-process read/write via misdirected uaccess), not a hypervisor or separate security authority escape.\nC:H - Wrong masking lets masked copy_from_user/strncpy_from_user read from 0x80000000 instead of the supplied high user or kernel-range pointer, enabling kernel-mediated disclosure of other mappings at that fixed address.\nI:H - Masked futex atomic ops and scoped user writes on mis-masked pointers can modify memory at 0x80000000 rather than the validated target, corrupting synchronization state or arbitrary user data.\nA:H - Misdirected user accesses can trigger KUAP/KUEP faults, WARN paths, or persistent futex corruption, causing kernel oops/panics or denial of service on embedded E500 systems."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:39:16.211Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d5c234774a82f27b594f70c15fc45ce3648e4295"
        },
        {
          "url": "https://git.kernel.org/stable/c/d610d3ab18197d87618da11ec5fe8b3cebf32208"
        }
      ],
      "title": "powerpc/uaccess: correct check for CONFIG_PPC_E500 in mask_user_address()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68473",
    "datePublished": "2026-08-15T05:51:30.274Z",
    "dateReserved": "2026-07-30T09:28:09.396Z",
    "dateUpdated": "2026-08-17T05:39:16.211Z",
    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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