Vulnerability-Lookup

GHSA-R3M4-WQ9M-7FX4

Vulnerability from github – Published: 2025-03-18 21:31 – Updated: 2025-03-18 21:32

Details

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

MIPS: pgalloc: fix memory leak caused by pgd_free()

pgd page is freed by generic implementation pgd_free() since commit f9cb654cb550 ("asm-generic: pgalloc: provide generic pgd_free()"), however, there are scenarios that the system uses more than one page as the pgd table, in such cases the generic implementation pgd_free() won't be applicable anymore. For example, when PAGE_SIZE_4KB is enabled and MIPS_VA_BITS_48 is not enabled in a 64bit system, the macro "PGD_ORDER" will be set as "1", which will cause allocating two pages as the pgd table. Well, at the same time, the generic implementation pgd_free() just free one pgd page, which will result in the memory leak.

The memory leak can be easily detected by executing shell command: "while true; do ls > /dev/null; grep MemFree /proc/meminfo; done"

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-2022-49210"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:00:58Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nMIPS: pgalloc: fix memory leak caused by pgd_free()\n\npgd page is freed by generic implementation pgd_free() since commit\nf9cb654cb550 (\"asm-generic: pgalloc: provide generic pgd_free()\"),\nhowever, there are scenarios that the system uses more than one page as\nthe pgd table, in such cases the generic implementation pgd_free() won\u0027t\nbe applicable anymore. For example, when PAGE_SIZE_4KB is enabled and\nMIPS_VA_BITS_48 is not enabled in a 64bit system, the macro \"PGD_ORDER\"\nwill be set as \"1\", which will cause allocating two pages as the pgd\ntable. Well, at the same time, the generic implementation pgd_free()\njust free one pgd page, which will result in the memory leak.\n\nThe memory leak can be easily detected by executing shell command:\n\"while true; do ls \u003e /dev/null; grep MemFree /proc/meminfo; done\"",
  "id": "GHSA-r3m4-wq9m-7fx4",
  "modified": "2025-03-18T21:32:00Z",
  "published": "2025-03-18T21:31:59Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49210"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1bf0d78c8cc3cf615a6e7bf33ada70b73592f0a1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2bc5bab9a763d520937e4f3fe8df51c6a1eceb97"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a8501d34b261906e4c76ec9da679f2cb4d309ed"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d29cda15cab086d82d692de016f7249545d4b6b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fa3d44424579972cc7c4fac3d9cf227798ebdfa0"
    }
  ],
  "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-2022-49210 (GCVE-0-2022-49210)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2026-05-11 18:55

Title

MIPS: pgalloc: fix memory leak caused by pgd_free()

Summary

In the Linux kernel, the following vulnerability has been resolved: MIPS: pgalloc: fix memory leak caused by pgd_free() pgd page is freed by generic implementation pgd_free() since commit f9cb654cb550 ("asm-generic: pgalloc: provide generic pgd_free()"), however, there are scenarios that the system uses more than one page as the pgd table, in such cases the generic implementation pgd_free() won't be applicable anymore. For example, when PAGE_SIZE_4KB is enabled and MIPS_VA_BITS_48 is not enabled in a 64bit system, the macro "PGD_ORDER" will be set as "1", which will cause allocating two pages as the pgd table. Well, at the same time, the generic implementation pgd_free() just free one pgd page, which will result in the memory leak. The memory leak can be easily detected by executing shell command: "while true; do ls > /dev/null; grep MemFree /proc/meminfo; done"

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-401 - Missing Release of Memory after Effective Lifetime

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/fa3d44424579972cc…
https://git.kernel.org/stable/c/d29cda15cab086d82…
https://git.kernel.org/stable/c/5a8501d34b261906e…
https://git.kernel.org/stable/c/1bf0d78c8cc3cf615…
https://git.kernel.org/stable/c/2bc5bab9a763d5209…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f9cb654cb550b7b87e8608b14fc3eca432429ffe , < fa3d44424579972cc7c4fac3d9cf227798ebdfa0 (git) Affected: f9cb654cb550b7b87e8608b14fc3eca432429ffe , < d29cda15cab086d82d692de016f7249545d4b6b4 (git) Affected: f9cb654cb550b7b87e8608b14fc3eca432429ffe , < 5a8501d34b261906e4c76ec9da679f2cb4d309ed (git) Affected: f9cb654cb550b7b87e8608b14fc3eca432429ffe , < 1bf0d78c8cc3cf615a6e7bf33ada70b73592f0a1 (git) Affected: f9cb654cb550b7b87e8608b14fc3eca432429ffe , < 2bc5bab9a763d520937e4f3fe8df51c6a1eceb97 (git)
Linux	Linux	Affected: 5.9 Unaffected: 0 , < 5.9 (semver) Unaffected: 5.10.110 , ≤ 5.10.* (semver) Unaffected: 5.15.33 , ≤ 5.15.* (semver) Unaffected: 5.16.19 , ≤ 5.16.* (semver) Unaffected: 5.17.2 , ≤ 5.17.* (semver) Unaffected: 5.18 , ≤ * (original_commit_for_fix)

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        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
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              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
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            }
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            {
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              "status": "unaffected",
              "version": "5.17.2",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
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        }
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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.

Action not permitted

GHSA-R3M4-WQ9M-7FX4

CVE-2022-49210 (GCVE-0-2022-49210)

Tags

Sightings

Nomenclature