github - ghsa-w8v8-pp27-rwcg

GHSA-W8V8-PP27-RWCG

Vulnerability from github – Published: 2024-08-21 09:31 – Updated: 2024-09-06 15:32

Details

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

drm/vmwgfx: Remove rcu locks from user resources

User resource lookups used rcu to avoid two extra atomics. Unfortunately the rcu paths were buggy and it was easy to make the driver crash by submitting command buffers from two different threads. Because the lookups never show up in performance profiles replace them with a regular spin lock which fixes the races in accesses to those shared resources.

Fixes kernel oops'es in IGT's vmwgfx execution_buffer stress test and seen crashes with apps using shared resources.

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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  "aliases": [
    "CVE-2022-48887"
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    "github_reviewed": false,
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    "nvd_published_at": "2024-08-21T07:15:05Z",
    "severity": "MODERATE"
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  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: Remove rcu locks from user resources\n\nUser resource lookups used rcu to avoid two extra atomics. Unfortunately\nthe rcu paths were buggy and it was easy to make the driver crash by\nsubmitting command buffers from two different threads. Because the\nlookups never show up in performance profiles replace them with a\nregular spin lock which fixes the races in accesses to those shared\nresources.\n\nFixes kernel oops\u0027es in IGT\u0027s vmwgfx execution_buffer stress test and\nseen crashes with apps using shared resources.",
  "id": "GHSA-w8v8-pp27-rwcg",
  "modified": "2024-09-06T15:32:56Z",
  "published": "2024-08-21T09:31:31Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48887"
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      "url": "https://git.kernel.org/stable/c/7ac9578e45b20e3f3c0c8eb71f5417a499a7226a"
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  "severity": [
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      "type": "CVSS_V3"
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}

CVE-2022-48887 (GCVE-0-2022-48887)

Vulnerability from cvelistv5 – Published: 2024-08-21 06:10 – Updated: 2025-05-04 08:25

Summary

In the Linux kernel, the following vulnerability has been resolved: drm/vmwgfx: Remove rcu locks from user resources User resource lookups used rcu to avoid two extra atomics. Unfortunately the rcu paths were buggy and it was easy to make the driver crash by submitting command buffers from two different threads. Because the lookups never show up in performance profiles replace them with a regular spin lock which fixes the races in accesses to those shared resources. Fixes kernel oops'es in IGT's vmwgfx execution_buffer stress test and seen crashes with apps using shared resources.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/7ac9578e45b20e3f3…
	https://git.kernel.org/stable/c/a309c7194e8a2f8bd…

Impacted products

Vendor

Product

Version

Linux

Affected: e14c02e6b6990e9f6ee18a214a22ac26bae1b25e , < 7ac9578e45b20e3f3c0c8eb71f5417a499a7226a (git)
Affected: e14c02e6b6990e9f6ee18a214a22ac26bae1b25e , < a309c7194e8a2f8bd4539b9449917913f6c2cd50 (git)

Linux

Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 6.1.7 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)

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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-W8V8-PP27-RWCG

CVE-2022-48887 (GCVE-0-2022-48887)

Tags

Sightings

Nomenclature