GHSA-6Q94-4246-2272
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-10-30 15:33In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: vgic-its: Don't dereference a NULL collection on ITT save
MAPC with V=0 drops ite->collection but leaves the ITE on the device's ITT list, and vgic_its_save_ite() dereferences it unconditionally. A guest that issues MAPD, MAPTI and then MAPC(V=0) therefore oopses the host when the VMM issues KVM_DEV_ARM_ITS_SAVE_TABLES to migrate it. That sequence is UNPREDICTABLE per the architecture, but KVM already handles the resulting state in the translate, MOVI and DISCARD paths.
Save a zeroed entry, which vgic_its_restore_ite() reads back as invalid. Skipping the ITE instead would leave the ITT slot holding whatever is in guest memory, and restore rejects an entry naming a collection the restored collection table does not have.
{
"affected": [],
"aliases": [
"CVE-2026-89912"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T11:17:00Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Don\u0027t dereference a NULL collection on ITT save\n\nMAPC with V=0 drops ite-\u003ecollection but leaves the ITE on the device\u0027s\nITT list, and vgic_its_save_ite() dereferences it unconditionally. A\nguest that issues MAPD, MAPTI and then MAPC(V=0) therefore oopses the\nhost when the VMM issues KVM_DEV_ARM_ITS_SAVE_TABLES to migrate it.\nThat sequence is UNPREDICTABLE per the architecture, but KVM already\nhandles the resulting state in the translate, MOVI and DISCARD paths.\n\nSave a zeroed entry, which vgic_its_restore_ite() reads back as\ninvalid. Skipping the ITE instead would leave the ITT slot holding\nwhatever is in guest memory, and restore rejects an entry naming a\ncollection the restored collection table does not have.",
"id": "GHSA-6q94-4246-2272",
"modified": "2026-10-30T15:33:29Z",
"published": "2026-09-16T12:30:41Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89912"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0fb71211146e39cf67811ccb873d2770a9c129ac"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2c3a87ad3d3935c43d465cd2465db9020f9e898f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/36df368861d2664291298feeb37dfef43fcae670"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3d4c26b16a04a084fe0bde08ccdd8086570f8bbe"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/566d0f99aec92280ce403f22068eb07241a79e2a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c6c156d931c33b92362383cf76f6d6e1291dcbfe"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dd0c3e6c03e3bb3fd7c0fa422230020674c5c25e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/df829e4fe235b3a0dbf830986d81c040d3d2e940"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Sightings
| Author | Source | Type | Date | Other |
|---|
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
Loading timeline…
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.