github - ghsa-8vjx-3vgx-66mx

ghsa-8vjx-3vgx-66mx

Vulnerability from github

Published

2023-01-11 15:30

Modified

2023-01-19 15:30

Severity ?

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

Details

There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above

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{
  "affected": [],
  "aliases": [
    "CVE-2022-4696"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416",
      "CWE-763"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-01-11T13:15:00Z",
    "severity": "HIGH"
  },
  "details": "There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won\u0027t use current-\u003ensproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current-\u003ensproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above",
  "id": "GHSA-8vjx-3vgx-66mx",
  "modified": "2023-01-19T15:30:31Z",
  "published": "2023-01-11T15:30:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-4696"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y\u0026id=75454b4bbfc7e6a4dd8338556f36ea9107ddf61a"
    },
    {
      "type": "WEB",
      "url": "https://kernel.dance/#75454b4bbfc7e6a4dd8338556f36ea9107ddf61a"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-4696 (GCVE-0-2022-4696)

Vulnerability from cvelistv5

Published

2023-01-11 12:33

Modified

2024-08-03 01:48

Severity ?

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

CWE

CWE-763 - Release of Invalid Pointer or Reference

Summary

There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above

References

URL

Tags

	https://kernel.dance/#75454b4bbfc7e6a4dd8338556f36ea9107ddf61a
	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=75454b4bbfc7e6a4dd8338556f36ea9107ddf61a

Impacted products

	Vendor	Product	Version
	Linux	Linux Kernel	Version: 5.7-rc1 <

Show details on NVD website

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