ghsa-82mq-c3x3-cpp9
Vulnerability from github
Published
2024-04-03 15:30
Modified
2024-04-03 15:30
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.
{ "affected": [], "aliases": [ "CVE-2023-52639" ], "database_specific": { "cwe_ids": [], "github_reviewed": false, "github_reviewed_at": null, "nvd_published_at": "2024-04-03T15:15:51Z", "severity": null }, "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": "2024-04-03T15:30:42Z", "published": "2024-04-03T15:30:42Z", "references": [ { "type": "ADVISORY", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52639" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/28bb27824f25f36e5f80229a358d66ee09244082" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/5df3b81a567eb565029563f26f374ae3803a1dfc" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/f5572c0323cf8b4f1f0618178648a25b8fb8a380" }, { "type": "WEB", "url": "https://git.kernel.org/stable/c/fe752331d4b361d43cfd0b89534b4b2176057c32" } ], "schema_version": "1.4.0", "severity": [] }
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