github - ghsa-6jh5-fcvp-frc9

GHSA-6JH5-FCVP-FRC9

Vulnerability from github – Published: 2024-12-27 15:31 – Updated: 2025-11-03 21:31

Details

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Don't retire aborted MMIO instruction

Returning an abort to the guest for an unsupported MMIO access is a documented feature of the KVM UAPI. Nevertheless, it's clear that this plumbing has seen limited testing, since userspace can trivially cause a WARN in the MMIO return:

WARNING: CPU: 0 PID: 30558 at arch/arm64/include/asm/kvm_emulate.h:536 kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536 Call trace: kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536 kvm_arch_vcpu_ioctl_run+0x98/0x15b4 arch/arm64/kvm/arm.c:1133 kvm_vcpu_ioctl+0x75c/0xa78 virt/kvm/kvm_main.c:4487 __do_sys_ioctl fs/ioctl.c:51 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x1e0/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x38/0x68 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x90/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

The splat is complaining that KVM is advancing PC while an exception is pending, i.e. that KVM is retiring the MMIO instruction despite a pending synchronous external abort. Womp womp.

Fix the glaring UAPI bug by skipping over all the MMIO emulation in case there is a pending synchronous exception. Note that while userspace is capable of pending an asynchronous exception (SError, IRQ, or FIQ), it is still safe to retire the MMIO instruction in this case as (1) they are by definition asynchronous, and (2) KVM relies on hardware support for pending/delivering these exceptions instead of the software state machine for advancing PC.

Severity ?

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-53196"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-12-27T14:15:27Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Don\u0027t retire aborted MMIO instruction\n\nReturning an abort to the guest for an unsupported MMIO access is a\ndocumented feature of the KVM UAPI. Nevertheless, it\u0027s clear that this\nplumbing has seen limited testing, since userspace can trivially cause a\nWARN in the MMIO return:\n\n  WARNING: CPU: 0 PID: 30558 at arch/arm64/include/asm/kvm_emulate.h:536 kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536\n  Call trace:\n   kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536\n   kvm_arch_vcpu_ioctl_run+0x98/0x15b4 arch/arm64/kvm/arm.c:1133\n   kvm_vcpu_ioctl+0x75c/0xa78 virt/kvm/kvm_main.c:4487\n   __do_sys_ioctl fs/ioctl.c:51 [inline]\n   __se_sys_ioctl fs/ioctl.c:893 [inline]\n   __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893\n   __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]\n   invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49\n   el0_svc_common+0x1e0/0x23c arch/arm64/kernel/syscall.c:132\n   do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151\n   el0_svc+0x38/0x68 arch/arm64/kernel/entry-common.c:712\n   el0t_64_sync_handler+0x90/0xfc arch/arm64/kernel/entry-common.c:730\n   el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598\n\nThe splat is complaining that KVM is advancing PC while an exception is\npending, i.e. that KVM is retiring the MMIO instruction despite a\npending synchronous external abort. Womp womp.\n\nFix the glaring UAPI bug by skipping over all the MMIO emulation in\ncase there is a pending synchronous exception. Note that while userspace\nis capable of pending an asynchronous exception (SError, IRQ, or FIQ),\nit is still safe to retire the MMIO instruction in this case as (1) they\nare by definition asynchronous, and (2) KVM relies on hardware support\nfor pending/delivering these exceptions instead of the software state\nmachine for advancing PC.",
  "id": "GHSA-6jh5-fcvp-frc9",
  "modified": "2025-11-03T21:31:48Z",
  "published": "2024-12-27T15:31:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-53196"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1e46460efe1ef9a31748de7675ff8fe0d8601af2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6af853cf5f897d55f42e9166f4db50e84e404fb3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0571c3add987bcb69c2ffd7a70c998bf8ce60fb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e735a5da64420a86be370b216c269b5dd8e830e2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ea6b5d98fea4ee8cb443ea98fda520909e90d30e"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-53196 (GCVE-0-2024-53196)

Vulnerability from cvelistv5 – Published: 2024-12-27 13:49 – Updated: 2025-11-03 20:47

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Don't retire aborted MMIO instruction Returning an abort to the guest for an unsupported MMIO access is a documented feature of the KVM UAPI. Nevertheless, it's clear that this plumbing has seen limited testing, since userspace can trivially cause a WARN in the MMIO return: WARNING: CPU: 0 PID: 30558 at arch/arm64/include/asm/kvm_emulate.h:536 kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536 Call trace: kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536 kvm_arch_vcpu_ioctl_run+0x98/0x15b4 arch/arm64/kvm/arm.c:1133 kvm_vcpu_ioctl+0x75c/0xa78 virt/kvm/kvm_main.c:4487 __do_sys_ioctl fs/ioctl.c:51 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x1e0/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x38/0x68 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x90/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 The splat is complaining that KVM is advancing PC while an exception is pending, i.e. that KVM is retiring the MMIO instruction despite a pending synchronous external abort. Womp womp. Fix the glaring UAPI bug by skipping over all the MMIO emulation in case there is a pending synchronous exception. Note that while userspace is capable of pending an asynchronous exception (SError, IRQ, or FIQ), it is still safe to retire the MMIO instruction in this case as (1) they are by definition asynchronous, and (2) KVM relies on hardware support for pending/delivering these exceptions instead of the software state machine for advancing PC.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/6af853cf5f897d55f…
	https://git.kernel.org/stable/c/ea6b5d98fea4ee8cb…
	https://git.kernel.org/stable/c/1e46460efe1ef9a31…
	https://git.kernel.org/stable/c/d0571c3add987bcb6…
	https://git.kernel.org/stable/c/e735a5da64420a86b…

Impacted products

Vendor

Product

Version

Linux

Affected: da345174ceca052469e4775e4ae263b5f27a9355 , < 6af853cf5f897d55f42e9166f4db50e84e404fb3 (git)
Affected: da345174ceca052469e4775e4ae263b5f27a9355 , < ea6b5d98fea4ee8cb443ea98fda520909e90d30e (git)
Affected: da345174ceca052469e4775e4ae263b5f27a9355 , < 1e46460efe1ef9a31748de7675ff8fe0d8601af2 (git)
Affected: da345174ceca052469e4775e4ae263b5f27a9355 , < d0571c3add987bcb69c2ffd7a70c998bf8ce60fb (git)
Affected: da345174ceca052469e4775e4ae263b5f27a9355 , < e735a5da64420a86be370b216c269b5dd8e830e2 (git)

Linux

Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 6.1.120 , ≤ 6.1.* (semver)
Unaffected: 6.6.66 , ≤ 6.6.* (semver)
Unaffected: 6.11.11 , ≤ 6.11.* (semver)
Unaffected: 6.12.2 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:47:27.048Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/mmio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6af853cf5f897d55f42e9166f4db50e84e404fb3",
              "status": "affected",
              "version": "da345174ceca052469e4775e4ae263b5f27a9355",
              "versionType": "git"
            },
            {
              "lessThan": "ea6b5d98fea4ee8cb443ea98fda520909e90d30e",
              "status": "affected",
              "version": "da345174ceca052469e4775e4ae263b5f27a9355",
              "versionType": "git"
            },
            {
              "lessThan": "1e46460efe1ef9a31748de7675ff8fe0d8601af2",
              "status": "affected",
              "version": "da345174ceca052469e4775e4ae263b5f27a9355",
              "versionType": "git"
            },
            {
              "lessThan": "d0571c3add987bcb69c2ffd7a70c998bf8ce60fb",
              "status": "affected",
              "version": "da345174ceca052469e4775e4ae263b5f27a9355",
              "versionType": "git"
            },
            {
              "lessThan": "e735a5da64420a86be370b216c269b5dd8e830e2",
              "status": "affected",
              "version": "da345174ceca052469e4775e4ae263b5f27a9355",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/mmio.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.120",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.66",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11.11",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.2",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13",
                  "versionStartIncluding": "5.5",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Don\u0027t retire aborted MMIO instruction\n\nReturning an abort to the guest for an unsupported MMIO access is a\ndocumented feature of the KVM UAPI. Nevertheless, it\u0027s clear that this\nplumbing has seen limited testing, since userspace can trivially cause a\nWARN in the MMIO return:\n\n  WARNING: CPU: 0 PID: 30558 at arch/arm64/include/asm/kvm_emulate.h:536 kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536\n  Call trace:\n   kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536\n   kvm_arch_vcpu_ioctl_run+0x98/0x15b4 arch/arm64/kvm/arm.c:1133\n   kvm_vcpu_ioctl+0x75c/0xa78 virt/kvm/kvm_main.c:4487\n   __do_sys_ioctl fs/ioctl.c:51 [inline]\n   __se_sys_ioctl fs/ioctl.c:893 [inline]\n   __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893\n   __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]\n   invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49\n   el0_svc_common+0x1e0/0x23c arch/arm64/kernel/syscall.c:132\n   do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151\n   el0_svc+0x38/0x68 arch/arm64/kernel/entry-common.c:712\n   el0t_64_sync_handler+0x90/0xfc arch/arm64/kernel/entry-common.c:730\n   el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598\n\nThe splat is complaining that KVM is advancing PC while an exception is\npending, i.e. that KVM is retiring the MMIO instruction despite a\npending synchronous external abort. Womp womp.\n\nFix the glaring UAPI bug by skipping over all the MMIO emulation in\ncase there is a pending synchronous exception. Note that while userspace\nis capable of pending an asynchronous exception (SError, IRQ, or FIQ),\nit is still safe to retire the MMIO instruction in this case as (1) they\nare by definition asynchronous, and (2) KVM relies on hardware support\nfor pending/delivering these exceptions instead of the software state\nmachine for advancing PC."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T09:55:30.910Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6af853cf5f897d55f42e9166f4db50e84e404fb3"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea6b5d98fea4ee8cb443ea98fda520909e90d30e"
        },
        {
          "url": "https://git.kernel.org/stable/c/1e46460efe1ef9a31748de7675ff8fe0d8601af2"
        },
        {
          "url": "https://git.kernel.org/stable/c/d0571c3add987bcb69c2ffd7a70c998bf8ce60fb"
        },
        {
          "url": "https://git.kernel.org/stable/c/e735a5da64420a86be370b216c269b5dd8e830e2"
        }
      ],
      "title": "KVM: arm64: Don\u0027t retire aborted MMIO instruction",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-53196",
    "datePublished": "2024-12-27T13:49:38.501Z",
    "dateReserved": "2024-11-19T17:17:25.015Z",
    "dateUpdated": "2025-11-03T20:47:27.048Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-6JH5-FCVP-FRC9

CVE-2024-53196 (GCVE-0-2024-53196)

Tags

Sightings

Nomenclature