github - ghsa-6x38-gwgp-2pcm

ghsa-6x38-gwgp-2pcm

Vulnerability from github

Published

2024-03-01 00:30

Modified

2024-11-07 18:31

Severity ?

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

Details

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

KVM: Stop looking for coalesced MMIO zones if the bus is destroyed

Abort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev() fails to allocate memory for the new instance of the bus. If it can't instantiate a new bus, unregister_dev() destroys all devices except the target device. But, it doesn't tell the caller that it obliterated the bus and invoked the destructor for all devices that were on the bus. In the coalesced MMIO case, this can result in a deleted list entry dereference due to attempting to continue iterating on coalesced_zones after future entries (in the walk) have been deleted.

Opportunistically add curly braces to the for-loop, which encompasses many lines but sneaks by without braces due to the guts being a single if statement.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47060"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-02-29T23:15:07Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Stop looking for coalesced MMIO zones if the bus is destroyed\n\nAbort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev()\nfails to allocate memory for the new instance of the bus.  If it can\u0027t\ninstantiate a new bus, unregister_dev() destroys all devices _except_ the\ntarget device.   But, it doesn\u0027t tell the caller that it obliterated the\nbus and invoked the destructor for all devices that were on the bus.  In\nthe coalesced MMIO case, this can result in a deleted list entry\ndereference due to attempting to continue iterating on coalesced_zones\nafter future entries (in the walk) have been deleted.\n\nOpportunistically add curly braces to the for-loop, which encompasses\nmany lines but sneaks by without braces due to the guts being a single\nif statement.",
  "id": "GHSA-6x38-gwgp-2pcm",
  "modified": "2024-11-07T18:31:19Z",
  "published": "2024-03-01T00:30:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47060"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/168e82f640ed1891a700bdb43e37da354b2ab63c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2a20592baff59c5351c5200ec667e1a2aa22af85"
    },
    {
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      "url": "https://git.kernel.org/stable/c/50cbad42bfea8c052b7ca590bd4126cdc898713c"
    },
    {
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      "url": "https://git.kernel.org/stable/c/5d3c4c79384af06e3c8e25b7770b6247496b4417"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7d1bc32d6477ff96a32695ea4be8144e4513ab2d"
    }
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  "schema_version": "1.4.0",
  "severity": [
    {
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      "type": "CVSS_V3"
    }
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}

cve-2021-47060

Vulnerability from cvelistv5

Published

2024-02-29 22:37

Modified

2024-12-19 07:34

Severity ?

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

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: Stop looking for coalesced MMIO zones if the bus is destroyed Abort the walk of coalesced MMIO zones if kvm_io_bus_unregister_dev() fails to allocate memory for the new instance of the bus. If it can't instantiate a new bus, unregister_dev() destroys all devices _except_ the target device. But, it doesn't tell the caller that it obliterated the bus and invoked the destructor for all devices that were on the bus. In the coalesced MMIO case, this can result in a deleted list entry dereference due to attempting to continue iterating on coalesced_zones after future entries (in the walk) have been deleted. Opportunistically add curly braces to the for-loop, which encompasses many lines but sneaks by without braces due to the guts being a single if statement.

References

▼	URL	Tags
	https://git.kernel.org/stable/c/7d1bc32d6477ff96a32695ea4be8144e4513ab2d
	https://git.kernel.org/stable/c/2a20592baff59c5351c5200ec667e1a2aa22af85
	https://git.kernel.org/stable/c/168e82f640ed1891a700bdb43e37da354b2ab63c
	https://git.kernel.org/stable/c/50cbad42bfea8c052b7ca590bd4126cdc898713c
	https://git.kernel.org/stable/c/5d3c4c79384af06e3c8e25b7770b6247496b4417

Impacted products

Vendor

Product

Version

▼

Linux

Version: 41b2ea7a6a11e2b1a7f2c29e1675a709a6b2b98d
Version: f65886606c2d3b562716de030706dfe1bea4ed5e
Version: f65886606c2d3b562716de030706dfe1bea4ed5e
Version: f65886606c2d3b562716de030706dfe1bea4ed5e
Version: f65886606c2d3b562716de030706dfe1bea4ed5e

Linux

Version: 5.9

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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