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CVE-2025-38367 (GCVE-0-2025-38367)

Vulnerability from cvelistv5 – Published: 2025-07-25 12:47 – Updated: 2026-08-05 12:01
VLAI
Title
LoongArch: KVM: Avoid overflow with array index
Summary
In the Linux kernel, the following vulnerability has been resolved: LoongArch: KVM: Avoid overflow with array index The variable index is modified and reused as array index when modify register EIOINTC_ENABLE. There will be array index overflow problem.
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3956a52bc05bd811082a3c9d2b423ee957e6fefc , < 2cc84c4b0d70d42e291862ecc848890d18e1004a (git)
Affected: 3956a52bc05bd811082a3c9d2b423ee957e6fefc , < 080e8d2ecdfde588897aa8a87a8884061f4dbbbb (git)
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Linux Linux Affected: 6.13
Unaffected: 0 , < 6.13 (semver)
Unaffected: 6.15.5 , ≤ 6.15.* (semver)
Unaffected: 6.16 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/loongarch/kvm/intc/eiointc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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              "versionType": "git"
            }
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        },
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          ],
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          "vendor": "Linux",
          "versions": [
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            },
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            },
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            }
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: KVM: Avoid overflow with array index\n\nThe variable index is modified and reused as array index when modify\nregister EIOINTC_ENABLE. There will be array index overflow problem."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
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          },
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            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached only by a guest vCPU executing a privileged `iocsrwr*` instruction against the in-kernel EIOINTC at IOCSR 0x1400, trapped locally on the host via `kvm_emu_iocsr()` \u2192 `kvm_io_bus_write()`. The attacker must be executing code on the physical host inside a VM, not sending network traffic.\nAC:L - A single deterministic 2/4/8-byte IOCSR write to offset 0x200\u20130x21f reproduces the out-of-bounds indexing every time, with no race, no timing window, and no dependence on memory layout the attacker cannot influence. The attacker also pre-seeds the out-of-bounds source bytes by writing the adjacent COREMAP/COREISR registers first.\nPR:L - IOCSR instructions require PLV0, so the attacker needs kernel privilege inside the guest \u2014 which is exactly what an ordinary cloud/virtualization tenant already possesses in its own VM, and no privilege at all on the host. From the host security authority being attacked, this is a low-privileged, untrusted principal.\nUI:N - The guest triggers the flaw entirely on its own by executing one instruction; no host operator, VMM action, or victim interaction is needed.\nS:C - The vulnerable component is the host kernel\u0027s KVM EIOINTC emulation, while the attacker\u0027s authority is confined to the guest; a guest-initiated write causes out-of-bounds accesses in host kernel memory, crossing the guest\u2192hypervisor security boundary.\nC:H - Guest input causes the host kernel to read up to ~192 bytes beyond the 32-byte `enable`/`isr` arrays, and those out-of-bounds host-memory values directly determine which interrupts are asserted/deasserted, giving the guest an observable oracle over host kernel memory it is not entitled to read.\nI:H - Values harvested out of bounds are fed into `eiointc_enable_irq()`/`eiointc_update_irq()`, which then modify host-maintained state \u2014 `coreisr` words, `sw_coreisr` bitmaps, and queued vCPU interrupt-pending bits \u2014 so attacker-influenced out-of-bounds data corrupts host kernel interrupt-controller state and forces arbitrary interrupt injection/withdrawal.\nA:H - The corrupted indexing drives `eiointc_update_irq()` for IRQs the guest could not otherwise reach, where `kvm_get_vcpu(s-\u003ekvm, s-\u003esw_coremap[irq])` can return NULL and `kvm_vcpu_ioctl_interrupt()` dereferences it while `eiointc-\u003elock` is held with interrupts disabled, producing a host kernel oops/hang; even short of that, spurious or permanently lost interrupt delivery wedges the VM."
            }
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        "dateUpdated": "2026-08-05T12:01:24.525Z",
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        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/080e8d2ecdfde588897aa8a87a8884061f4dbbbb"
        }
      ],
      "title": "LoongArch: KVM: Avoid overflow with array index",
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    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38367",
    "datePublished": "2025-07-25T12:47:41.965Z",
    "dateReserved": "2025-04-16T04:51:24.008Z",
    "dateUpdated": "2026-08-05T12:01:24.525Z",
    "state": "PUBLISHED"
  },
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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:29:43+00:00",
      "cve": "CVE-2025-38367",
      "id": "CVE-2025-38367",
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      "title": "kernel: LoongArch: KVM: Avoid overflow with array index",
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      "cve": "CVE-2025-38367",
      "id": "CVE-2025-38367",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-38367",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-38367.json",
      "version": "5"
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  }
}



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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.

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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.


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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.