github - ghsa-xmvq-5949-6227

ghsa-xmvq-5949-6227

Vulnerability from github

Published

2024-03-02 00:31

Modified

2024-03-02 00:31

Details

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

habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory

Our code analyzer reported a uaf.

In gaudi_memset_device_memory, cb is get via hl_cb_kernel_create() with 2 refcount. If hl_cs_allocate_job() failed, the execution runs into release_cb branch. One ref of cb is dropped by hl_cb_put(cb) and could be freed if other thread also drops one ref. Then cb is used by cb->id later, which is a potential uaf.

My patch add a variable 'id' to accept the value of cb->id before the hl_cb_put(cb) is called, to avoid the potential uaf.

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47081"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-03-01T22:15:47Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nhabanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory\n\nOur code analyzer reported a uaf.\n\nIn gaudi_memset_device_memory, cb is get via hl_cb_kernel_create()\nwith 2 refcount.\nIf hl_cs_allocate_job() failed, the execution runs into release_cb\nbranch. One ref of cb is dropped by hl_cb_put(cb) and could be freed\nif other thread also drops one ref. Then cb is used by cb-\u003eid later,\nwhich is a potential uaf.\n\nMy patch add a variable \u0027id\u0027 to accept the value of cb-\u003eid before the\nhl_cb_put(cb) is called, to avoid the potential uaf.",
  "id": "GHSA-xmvq-5949-6227",
  "modified": "2024-03-02T00:31:31Z",
  "published": "2024-03-02T00:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47081"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/115726c5d312b462c9d9931ea42becdfa838a076"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b49f5af30b0e4064fbd91e83823a4bfcb2c7a3e7"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

cve-2021-47081

Vulnerability from cvelistv5

Published

2024-03-01 21:15

Modified

2024-11-04 11:59

Severity ?

Summary

habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory

References

▼	URL	Tags
	https://git.kernel.org/stable/c/b49f5af30b0e4064fbd91e83823a4bfcb2c7a3e7
	https://git.kernel.org/stable/c/115726c5d312b462c9d9931ea42becdfa838a076

Impacted products

▼	Vendor	Product
	Linux	Linux
	Linux	Linux

Show details on NVD website

JSON

To clipboard

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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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