github - ghsa-82mq-c3x3-cpp9

GHSA-82MQ-C3X3-CPP9

Vulnerability from github – Published: 2024-04-03 15:30 – Updated: 2025-03-17 18:31

Details

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

KVM: s390: vsie: fix race during shadow creation

Right now it is possible to see gmap->private being zero in kvm_s390_vsie_gmap_notifier resulting in a crash. This is due to the fact that we add gmap->private == kvm after creation:

static int acquire_gmap_shadow(struct kvm_vcpu vcpu, struct vsie_page vsie_page) { [...] gmap = gmap_shadow(vcpu->arch.gmap, asce, edat); if (IS_ERR(gmap)) return PTR_ERR(gmap); gmap->private = vcpu->kvm;

Let children inherit the private field of the parent.

Severity ?

4.7 (Medium)


                  
                    CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2023-52639"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-04-03T15:15:51Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: vsie: fix race during shadow creation\n\nRight now it is possible to see gmap-\u003eprivate being zero in\nkvm_s390_vsie_gmap_notifier resulting in a crash.  This is due to the\nfact that we add gmap-\u003eprivate == kvm after creation:\n\nstatic int acquire_gmap_shadow(struct kvm_vcpu *vcpu,\n                               struct vsie_page *vsie_page)\n{\n[...]\n        gmap = gmap_shadow(vcpu-\u003earch.gmap, asce, edat);\n        if (IS_ERR(gmap))\n                return PTR_ERR(gmap);\n        gmap-\u003eprivate = vcpu-\u003ekvm;\n\nLet children inherit the private field of the parent.",
  "id": "GHSA-82mq-c3x3-cpp9",
  "modified": "2025-03-17T18:31:38Z",
  "published": "2024-04-03T15:30:42Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52639"
    },
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CVE-2023-52639 (GCVE-0-2023-52639)

Vulnerability from cvelistv5 – Published: 2024-04-03 14:54 – Updated: 2025-05-04 07:40

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: vsie: fix race during shadow creation Right now it is possible to see gmap->private being zero in kvm_s390_vsie_gmap_notifier resulting in a crash. This is due to the fact that we add gmap->private == kvm after creation: static int acquire_gmap_shadow(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page) { [...] gmap = gmap_shadow(vcpu->arch.gmap, asce, edat); if (IS_ERR(gmap)) return PTR_ERR(gmap); gmap->private = vcpu->kvm; Let children inherit the private field of the parent.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/5df3b81a567eb5650…
	https://git.kernel.org/stable/c/f5572c0323cf8b4f1…
	https://git.kernel.org/stable/c/28bb27824f25f36e5…
	https://git.kernel.org/stable/c/fe752331d4b361d43…

Impacted products

Vendor

Product

Version

Linux

Affected: a3508fbe9dc6dd3bece0c7bf889cc085a011738c , < 5df3b81a567eb565029563f26f374ae3803a1dfc (git)
Affected: a3508fbe9dc6dd3bece0c7bf889cc085a011738c , < f5572c0323cf8b4f1f0618178648a25b8fb8a380 (git)
Affected: a3508fbe9dc6dd3bece0c7bf889cc085a011738c , < 28bb27824f25f36e5f80229a358d66ee09244082 (git)
Affected: a3508fbe9dc6dd3bece0c7bf889cc085a011738c , < fe752331d4b361d43cfd0b89534b4b2176057c32 (git)

Linux

Affected: 4.8
Unaffected: 0 , < 4.8 (semver)
Unaffected: 6.1.82 , ≤ 6.1.* (semver)
Unaffected: 6.6.22 , ≤ 6.6.* (semver)
Unaffected: 6.7.6 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (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-82MQ-C3X3-CPP9

CVE-2023-52639 (GCVE-0-2023-52639)

Tags

Sightings

Nomenclature