github - ghsa-2hrm-9gxc-3c35

ghsa-2hrm-9gxc-3c35

Vulnerability from github

Published

2024-02-27 12:31

Modified

2024-04-10 21:30

Severity ?

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

Details

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

mm/damon/dbgfs: fix 'struct pid' leaks in 'dbgfs_target_ids_write()'

DAMON debugfs interface increases the reference counts of 'struct pid's for targets from the 'target_ids' file write callback ('dbgfs_target_ids_write()'), but decreases the counts only in DAMON monitoring termination callback ('dbgfs_before_terminate()').

Therefore, when 'target_ids' file is repeatedly written without DAMON monitoring start/termination, the reference count is not decreased and therefore memory for the 'struct pid' cannot be freed. This commit fixes this issue by decreasing the reference counts when 'target_ids' is written.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-46937"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-668"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-27T10:15:08Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/dbgfs: fix \u0027struct pid\u0027 leaks in \u0027dbgfs_target_ids_write()\u0027\n\nDAMON debugfs interface increases the reference counts of \u0027struct pid\u0027s\nfor targets from the \u0027target_ids\u0027 file write callback\n(\u0027dbgfs_target_ids_write()\u0027), but decreases the counts only in DAMON\nmonitoring termination callback (\u0027dbgfs_before_terminate()\u0027).\n\nTherefore, when \u0027target_ids\u0027 file is repeatedly written without DAMON\nmonitoring start/termination, the reference count is not decreased and\ntherefore memory for the \u0027struct pid\u0027 cannot be freed.  This commit\nfixes this issue by decreasing the reference counts when \u0027target_ids\u0027 is\nwritten.",
  "id": "GHSA-2hrm-9gxc-3c35",
  "modified": "2024-04-10T21:30:28Z",
  "published": "2024-02-27T12:31:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-46937"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ebb3f994dd92f8fb4d70c7541091216c1e10cb71"
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  "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:N",
      "type": "CVSS_V3"
    }
  ]
}

cve-2021-46937

Vulnerability from cvelistv5

Published

2024-02-27 09:44

Modified

2024-11-04 11:56

Severity ?

Summary

mm/damon/dbgfs: fix 'struct pid' leaks in 'dbgfs_target_ids_write()'

References

▼	URL	Tags
	https://git.kernel.org/stable/c/ffe4a1ba1a82c416a6b3a09d46594f6a885ae141
	https://git.kernel.org/stable/c/ebb3f994dd92f8fb4d70c7541091216c1e10cb71

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

JSON

To clipboard

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                "role": "CISA Coordinator",
                "timestamp": "2024-02-27T15:48:08.860920Z",
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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
Confirmed: The vulnerability is confirmed from an analyst perspective.
Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
Patched: This vulnerability was successfully patched by the user reporting the sighting.
Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
Not confirmed: The user expresses doubt about the veracity of the vulnerability.
Not patched: This vulnerability was not successfully patched by the user reporting the sighting.

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