Vulnerability-Lookup

GHSA-VFHM-MC4C-75C8

Vulnerability from github – Published: 2025-09-22 21:30 – Updated: 2025-09-22 21:30

Details

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

uaccess: fix integer overflow on access_ok()

Three architectures check the end of a user access against the address limit without taking a possible overflow into account. Passing a negative length or another overflow in here returns success when it should not.

Use the most common correct implementation here, which optimizes for a constant 'size' argument, and turns the common case into a single comparison.

Severity

7.1 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2022-49289"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-190"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:05Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nuaccess: fix integer overflow on access_ok()\n\nThree architectures check the end of a user access against the\naddress limit without taking a possible overflow into account.\nPassing a negative length or another overflow in here returns\nsuccess when it should not.\n\nUse the most common correct implementation here, which optimizes\nfor a constant \u0027size\u0027 argument, and turns the common case into a\nsingle comparison.",
  "id": "GHSA-vfhm-mc4c-75c8",
  "modified": "2025-09-22T21:30:16Z",
  "published": "2025-09-22T21:30:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49289"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/222ca305c9fd39e5ed8104da25c09b2b79a516a8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99801e2f457824955da4aadaa035913a6dede03a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e65d28d4e9bf90a35ba79c06661a572a38391dec"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49289 (GCVE-0-2022-49289)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:56 – Updated: 2026-08-05 08:54

Title

uaccess: fix integer overflow on access_ok()

Summary

In the Linux kernel, the following vulnerability has been resolved: uaccess: fix integer overflow on access_ok() Three architectures check the end of a user access against the address limit without taking a possible overflow into account. Passing a negative length or another overflow in here returns success when it should not. Use the most common correct implementation here, which optimizes for a constant 'size' argument, and turns the common case into a single comparison.

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

4 references

URL	Tags
https://git.kernel.org/stable/c/e65d28d4e9bf90a35…
https://git.kernel.org/stable/c/99801e2f457824955…
https://git.kernel.org/stable/c/a1ad747fc1a0e06d1…
https://git.kernel.org/stable/c/222ca305c9fd39e5e…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 7567746e1c0d66ac0ef8a9d8816ca694462c7370 , < e65d28d4e9bf90a35ba79c06661a572a38391dec (git) Affected: 7567746e1c0d66ac0ef8a9d8816ca694462c7370 , < 99801e2f457824955da4aadaa035913a6dede03a (git) Affected: 7567746e1c0d66ac0ef8a9d8816ca694462c7370 , < a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8 (git) Affected: 7567746e1c0d66ac0ef8a9d8816ca694462c7370 , < 222ca305c9fd39e5ed8104da25c09b2b79a516a8 (git)
Linux	Linux	Affected: 3.2 Unaffected: 0 , < 3.2 (semver) Unaffected: 5.15.32 , ≤ 5.15.* (semver) Unaffected: 5.16.18 , ≤ 5.16.* (semver) Unaffected: 5.17.1 , ≤ 5.17.* (semver) Unaffected: 5.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/csky/include/asm/uaccess.h",
            "arch/hexagon/include/asm/uaccess.h",
            "arch/microblaze/include/asm/uaccess.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e65d28d4e9bf90a35ba79c06661a572a38391dec",
              "status": "affected",
              "version": "7567746e1c0d66ac0ef8a9d8816ca694462c7370",
              "versionType": "git"
            },
            {
              "lessThan": "99801e2f457824955da4aadaa035913a6dede03a",
              "status": "affected",
              "version": "7567746e1c0d66ac0ef8a9d8816ca694462c7370",
              "versionType": "git"
            },
            {
              "lessThan": "a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8",
              "status": "affected",
              "version": "7567746e1c0d66ac0ef8a9d8816ca694462c7370",
              "versionType": "git"
            },
            {
              "lessThan": "222ca305c9fd39e5ed8104da25c09b2b79a516a8",
              "status": "affected",
              "version": "7567746e1c0d66ac0ef8a9d8816ca694462c7370",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/csky/include/asm/uaccess.h",
            "arch/hexagon/include/asm/uaccess.h",
            "arch/microblaze/include/asm/uaccess.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.2"
            },
            {
              "lessThan": "3.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.32",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.16.*",
              "status": "unaffected",
              "version": "5.16.18",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.32",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.16.18",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.1",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18",
                  "versionStartIncluding": "3.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuaccess: fix integer overflow on access_ok()\n\nThree architectures check the end of a user access against the\naddress limit without taking a possible overflow into account.\nPassing a negative length or another overflow in here returns\nsuccess when it should not.\n\nUse the most common correct implementation here, which optimizes\nfor a constant \u0027size\u0027 argument, and turns the common case into a\nsingle comparison."
        }
      ],
      "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 - The bug is in arch-specific access_ok() used by syscall copy_to/from_user paths; an attacker needs local ability to invoke syscalls with crafted user pointers and lengths on csky, hexagon, or microblaze.\nAC:L - Triggering only requires passing an address and size that cause addr+size to wrap; no race, probabilistic memory layout, or other condition outside the attacker\u2019s control is needed.\nPR:L - Any unprivileged local user can reach access_ok() through ordinary read/write/ioctl and related syscalls that validate user buffers; no root or special capabilities are required.\nUI:N - Exploitation is fully attacker-driven via syscalls and does not require any action by another user.\nS:U - Impact is confined to the local kernel\u2019s security authority (same-host privilege boundary); this is not a VM escape, IOMMU bypass, or other cross-authority break.\nC:H - A successful access_ok() bypass lets copy_from_user read kernel addresses as if they were userspace, enabling arbitrary kernel memory disclosure when that data is returned to the attacker.\nI:H - The same bypass lets copy_to_user/clear_user write into kernel virtual addresses, yielding a kernel memory corruption / write primitive usable for control-flow hijacking.\nA:H - Walking into invalid or sensitive kernel mappings via the unchecked copy path can oops/panic the kernel, and huge overflowing lengths can also produce fatal DoS behavior."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:54:37.099Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e65d28d4e9bf90a35ba79c06661a572a38391dec"
        },
        {
          "url": "https://git.kernel.org/stable/c/99801e2f457824955da4aadaa035913a6dede03a"
        },
        {
          "url": "https://git.kernel.org/stable/c/a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/222ca305c9fd39e5ed8104da25c09b2b79a516a8"
        }
      ],
      "title": "uaccess: fix integer overflow on access_ok()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49289",
    "datePublished": "2025-02-26T01:56:27.026Z",
    "dateReserved": "2025-02-26T01:49:39.302Z",
    "dateUpdated": "2026-08-05T08:54:37.099Z",
    "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.

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.

Action not permitted

GHSA-VFHM-MC4C-75C8

CVE-2022-49289 (GCVE-0-2022-49289)

Tags

Sightings

Nomenclature

Related by attack behaviour