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BELL-CVE-2026-46316 (CVE-2026-46316)
Vulnerability from osv_bellsoft – Published: 2026-06-10 06:10 – Updated: 2026-07-06 20:01 – Source website
VLAI
Severity
9.3 (Critical)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"package": {
"ecosystem": "Alpaquita:25",
"name": "linux-lts",
"purl": "pkg:apk/alpaquita/linux-lts?arch=source\u0026distro=25"
},
"ranges": [
{
"events": [
{
"introduced": "6.12.92-r0"
},
{
"fixed": "6.12.95-r0"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "Alpaquita:stream",
"name": "linux-lts",
"purl": "pkg:apk/alpaquita/linux-lts?arch=source\u0026distro=stream"
},
"ranges": [
{
"events": [
{
"introduced": "6.12.92-r1"
},
{
"fixed": "6.18.35-r1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"id": "BELL-CVE-2026-46316",
"modified": "2026-07-06T20:01:52.51079Z",
"published": "2026-06-10T06:10:20.903178Z",
"references": [
{
"type": "ADVISORY",
"url": "https://docs.bell-sw.com/security/cves/CVE-2026-46316"
}
],
"schema_version": "1.7.4",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"upstream": [
"CVE-2026-46316"
]
}
CVE-2026-46316 (GCVE-0-2026-46316)
Vulnerability from cvelistv5 – Published: 2026-06-09 11:52 – Updated: 2026-09-16 12:04
VLAI
EPSS
VEX
Title
KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry
vgic_its_invalidate_cache() walks the per-ITS translation cache with
xa_for_each() and drops the cache's reference on each entry with
vgic_put_irq(). It puts the iterated pointer, though, rather than the
value returned by xa_erase().
The function is called from contexts that do not exclude one another: the
ITS command handlers hold its_lock, the GITS_CTLR write path holds
cmd_lock, and the path that clears EnableLPIs in a redistributor's
GICR_CTLR holds neither. Two or more of them can drain the same cache
concurrently, and if each one observes the same entry, erases it and then
puts it, the single reference the cache holds on that entry is dropped
more than once. The entry can then be freed while an ITE still maps it.
xa_erase() is atomic and returns the previous entry, so put only the entry
that this context actually removed. The cache reference is then dropped
exactly once per entry even when the invalidations run concurrently, and
the behavior is unchanged when only one context runs.
Severity
9.3 (Critical)
CWE
- CWE-911 - Improper Update of Reference Count
Assigner
References
15 references
Impacted products
16 products
| Vendor | Product | Version | |
|---|---|---|---|
| Linux | Linux |
Affected:
8201d1028caa4fae88e222c4e8cf541fdf45b821 , < b7b72e88046328c9fdc638fe887d4240257dd5dc
(git)
Affected: 8201d1028caa4fae88e222c4e8cf541fdf45b821 , < 2bbc395e81bd29c543a0529a678327e932a7ec69 (git) Affected: 8201d1028caa4fae88e222c4e8cf541fdf45b821 , < 9121f4605ab94969f62d1b5714ca3c6c69bd202f (git) Affected: 8201d1028caa4fae88e222c4e8cf541fdf45b821 , < 13031fb6b8357fbbcded2a7f4cba73e4781ee594 (git) |
|
| Linux | Linux |
Affected:
6.10
Unaffected: 0 , < 6.10 (semver) Unaffected: 6.12.93 , ≤ 6.12.* (semver) Unaffected: 6.18.35 , ≤ 6.18.* (semver) Unaffected: 7.0.12 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:6.12.0-211.30.1.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
0:6.12.0-55.88.1.el10_0 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:5.14.0-687.22.1.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 cpe:/o:redhat:enterprise_linux:9 |
|
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
0:5.14.0-570.127.1.el9_6 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.19 |
Unaffected:
4.19.9.6.202607220857-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.19::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.20 |
Unaffected:
4.20.9.6.202607151937-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.20::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.21 |
Unaffected:
4.21.9.6.202607151836-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.21::el9 |
|
| Red Hat | Red Hat OpenShift Container Platform 4.22 |
Unaffected:
4.22.9.8.202607152026-0 , < *
(rpm)
cpe:/a:redhat:openshift:4.22::el9 |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
|
| Red Hat | Red Hat Enterprise Linux 8 |
cpe:/o:redhat:enterprise_linux:8
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/o:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat Enterprise Linux for NVIDIA 26 |
cpe:/a:redhat:enterprise_linux_nvidia:
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
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}
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"scenarios": [
{
"lang": "en",
"value": "AV:L - The flaw is reached only from KVM guest MMIO traps on GICv3 ITS registers (GITS_CTLR/CWRITER command processing) and redistributor GICR_CTLR LPI-disable writes, not from any network-facing host protocol.\nAC:L - A guest controls all racing contexts by pinning vCPUs to run concurrent ITS commands, GITS_CTLR disable, and GICR_CTLR LPI-disable on the same ITS translation cache; the attacker creates and wins the race rather than depending on uncontrollable host timing.\nPR:N - No host privileges are required beyond running code in an assigned KVM guest (e.g. a cloud VM tenant on arm64); exploitation needs guest-kernel access to GIC MMIO, not host root or capabilities in the init namespace.\nUI:N - Exploitation is fully attacker-driven from within the guest VM and does not require any victim user or administrator action on the host.\nS:C - The use-after-free corrupts host-kernel heap memory (`struct vgic_irq`) from guest-controlled VGIC operations, crossing the guest-to-host virtualization security boundary with VM-escape impact.\nC:H - Premature `vgic_put_irq()` frees the LPI `vgic_irq` while an ITE still maps it, yielding a kernel heap use-after-free that can be leveraged for arbitrary host memory disclosure via subsequent IRQ structure dereferences.\nI:H - The dangling `vgic_irq` pointer allows attacker-influenced writes through IRQ state fields (`irq_lock`, `pending_latch`, `target_vcpu`, list heads), enabling heap grooming and potential host control-flow or data corruption.\nA:H - The refcount underflow frees live kernel objects still in use by the ITS, causing host kernel oops/panic or hang during subsequent LPI delivery, MSI injection, or ITS command handling."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:31:11.943Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/b7b72e88046328c9fdc638fe887d4240257dd5dc"
},
{
"url": "https://git.kernel.org/stable/c/2bbc395e81bd29c543a0529a678327e932a7ec69"
},
{
"url": "https://git.kernel.org/stable/c/9121f4605ab94969f62d1b5714ca3c6c69bd202f"
},
{
"url": "https://git.kernel.org/stable/c/13031fb6b8357fbbcded2a7f4cba73e4781ee594"
}
],
"title": "KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-46316",
"datePublished": "2026-06-09T11:52:29.349Z",
"dateReserved": "2026-05-13T15:03:33.112Z",
"dateUpdated": "2026-09-16T12:04:19.805Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
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.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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.
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.
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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.
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