CVE-2023-52639: KVM: s390: vsie: fix race during shadow creation
First published: Wed Apr 03 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.1.82 | 6.1.82 |
| redhat/kernel | <6.6.22 | 6.6.22 |
| redhat/kernel | <6.7.6 | 6.7.6 |
| redhat/kernel | <6.8 | 6.8 |
| debian/linux | <=5.10.223-1<=5.10.226-1 | 6.1.115-1 6.1.112-1 6.11.9-1 6.11.10-1 |
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Reference Links
- https://git.kernel.org/stable/c/28bb27824f25f36e5f80229a358d66ee09244082
- https://git.kernel.org/stable/c/5df3b81a567eb565029563f26f374ae3803a1dfc
- https://git.kernel.org/stable/c/f5572c0323cf8b4f1f0618178648a25b8fb8a380
- https://git.kernel.org/stable/c/fe752331d4b361d43cfd0b89534b4b2176057c32
- https://access.redhat.com/security/cve/CVE-2023-52639
- https://lore.kernel.org/linux-cve-announce/2024040335-CVE-2023-52639-5b67@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2273081
- https://access.redhat.com/errata/RHSA-2024:3855
- https://access.redhat.com/errata/RHSA-2024:4740
- https://access.redhat.com/errata/RHSA-2024:5257
- https://bugzilla.redhat.com/show_bug.cgi?id=2273080
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-52639
- https://nvd.nist.gov/vuln/detail/CVE-2023-52639
- https://launchpad.net/bugs/cve/CVE-2023-52639
- https://security-tracker.debian.org/tracker/CVE-2023-52639
- https://ubuntu.com/security/CVE-2023-52639
- https://git.kernel.org/linus/fe752331d4b361d43cfd0b89534b4b2176057c32
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