github - ghsa-4366-c9hw-r9qg

GHSA-4366-C9HW-R9QG

Vulnerability from github – Published: 2024-09-18 09:30 – Updated: 2024-09-23 18:30

Details

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

xen: privcmd: Fix possible access to a freed kirqfd instance

Nothing prevents simultaneous ioctl calls to privcmd_irqfd_assign() and privcmd_irqfd_deassign(). If that happens, it is possible that a kirqfd created and added to the irqfds_list by privcmd_irqfd_assign() may get removed by another thread executing privcmd_irqfd_deassign(), while the former is still using it after dropping the locks.

This can lead to a situation where an already freed kirqfd instance may be accessed and cause kernel oops.

Use SRCU locking to prevent the same, as is done for the KVM implementation for irqfds.

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-2024-46762"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-416"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-09-18T08:15:04Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nxen: privcmd: Fix possible access to a freed kirqfd instance\n\nNothing prevents simultaneous ioctl calls to privcmd_irqfd_assign() and\nprivcmd_irqfd_deassign(). If that happens, it is possible that a kirqfd\ncreated and added to the irqfds_list by privcmd_irqfd_assign() may get\nremoved by another thread executing privcmd_irqfd_deassign(), while the\nformer is still using it after dropping the locks.\n\nThis can lead to a situation where an already freed kirqfd instance may\nbe accessed and cause kernel oops.\n\nUse SRCU locking to prevent the same, as is done for the KVM\nimplementation for irqfds.",
  "id": "GHSA-4366-c9hw-r9qg",
  "modified": "2024-09-23T18:30:34Z",
  "published": "2024-09-18T09:30:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-46762"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/112fd2f02b308564724b8e81006c254d20945c4b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/611ff1b1ae989a7bcce3e2a8e132ee30e968c557"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e997b357b13a7d95de31681fc54fcc34235fa527"
    }
  ],
  "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-2024-46762 (GCVE-0-2024-46762)

Vulnerability from cvelistv5 – Published: 2024-09-18 07:12 – Updated: 2025-05-04 09:33

Summary

In the Linux kernel, the following vulnerability has been resolved: xen: privcmd: Fix possible access to a freed kirqfd instance Nothing prevents simultaneous ioctl calls to privcmd_irqfd_assign() and privcmd_irqfd_deassign(). If that happens, it is possible that a kirqfd created and added to the irqfds_list by privcmd_irqfd_assign() may get removed by another thread executing privcmd_irqfd_deassign(), while the former is still using it after dropping the locks. This can lead to a situation where an already freed kirqfd instance may be accessed and cause kernel oops. Use SRCU locking to prevent the same, as is done for the KVM implementation for irqfds.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/e997b357b13a7d95d…
	https://git.kernel.org/stable/c/112fd2f02b3085647…
	https://git.kernel.org/stable/c/611ff1b1ae989a7bc…

Impacted products

Vendor

Product

Version

Linux

Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < e997b357b13a7d95de31681fc54fcc34235fa527 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 112fd2f02b308564724b8e81006c254d20945c4b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 611ff1b1ae989a7bcce3e2a8e132ee30e968c557 (git)

Linux

Unaffected: 6.6.51 , ≤ 6.6.* (semver)
Unaffected: 6.10.10 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)

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                  },
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                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T14:43:33.478974Z",
                "version": "2.0.3"
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Sightings

Author	Source	Type	Date

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-4366-C9HW-R9QG

CVE-2024-46762 (GCVE-0-2024-46762)

Tags

Sightings

Nomenclature