github - ghsa-33f2-r445-jvq6

ghsa-33f2-r445-jvq6

Vulnerability from github

Published

2022-05-24 17:16

Modified

2022-05-24 17:16

Details

Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma->vm_file in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vm_file points. On upstream kernels this is not an issue, as no callers dereference vm_file following after call_mmap() returns an error. However, the aufs patchs change mmap_region() to replace the fput() using a local variable with vma_fput(), which will fput() vm_file, leading to a refcount underflow.

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{
  "affected": [],
  "aliases": [
    "CVE-2019-15794"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2020-04-24T00:15:00Z",
    "severity": "HIGH"
  },
  "details": "Overlayfs in the Linux kernel and shiftfs, a non-upstream patch to the Linux kernel included in the Ubuntu 5.0 and 5.3 kernel series, both replace vma-\u003evm_file in their mmap handlers. On error the original value is not restored, and the reference is put for the file to which vm_file points. On upstream kernels this is not an issue, as no callers dereference vm_file following after call_mmap() returns an error. However, the aufs patchs change mmap_region() to replace the fput() using a local variable with vma_fput(), which will fput() vm_file, leading to a refcount underflow.",
  "id": "GHSA-33f2-r445-jvq6",
  "modified": "2022-05-24T17:16:24Z",
  "published": "2022-05-24T17:16:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2019-15794"
    },
    {
      "type": "WEB",
      "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3e38b4bea37635"
    },
    {
      "type": "WEB",
      "url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203fca146fd81ce3"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/usn/usn-4208-1"
    },
    {
      "type": "WEB",
      "url": "https://usn.ubuntu.com/usn/usn-4209-1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2019-15794

Vulnerability from cvelistv5

Published

2020-04-23 23:55

Modified

2024-09-16 19:52

Severity ?

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

Summary

References

▼	URL	Tags
	https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=270d16ae48a4dbf1c7e25e94cc3e38b4bea37635	x_refsource_MISC
	https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/eoan/commit/?id=ef81780548d20a786cc77ed4203fca146fd81ce3	x_refsource_MISC
	https://usn.ubuntu.com/usn/usn-4208-1	x_refsource_MISC
	https://usn.ubuntu.com/usn/usn-4209-1	x_refsource_MISC

Impacted products

Vendor

Product

Version

▼

Ubuntu

Linux kernel

Version: 5.3 kernel < 5.3.0-24.26
Version: 5.0 kernel < 5.0.0-37.40

Show details on NVD website

JSON

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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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