CVE-2022-50851 (GCVE-0-2022-50851)

Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2025-12-30 12:15
VLAI?
Title
vhost_vdpa: fix the crash in unmap a large memory
Summary
In the Linux kernel, the following vulnerability has been resolved: vhost_vdpa: fix the crash in unmap a large memory While testing in vIOMMU, sometimes Guest will unmap very large memory, which will cause the crash. To fix this, add a new function vhost_vdpa_general_unmap(). This function will only unmap the memory that saved in iotlb. Call Trace: [ 647.820144] ------------[ cut here ]------------ [ 647.820848] kernel BUG at drivers/iommu/intel/iommu.c:1174! [ 647.821486] invalid opcode: 0000 [#1] PREEMPT SMP PTI [ 647.822082] CPU: 10 PID: 1181 Comm: qemu-system-x86 Not tainted 6.0.0-rc1home_lulu_2452_lulu7_vhost+ #62 [ 647.823139] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-29-g6a62e0cb0dfe-prebuilt.qem4 [ 647.824365] RIP: 0010:domain_unmap+0x48/0x110 [ 647.825424] Code: 48 89 fb 8d 4c f6 1e 39 c1 0f 4f c8 83 e9 0c 83 f9 3f 7f 18 48 89 e8 48 d3 e8 48 85 c0 75 59 [ 647.828064] RSP: 0018:ffffae5340c0bbf0 EFLAGS: 00010202 [ 647.828973] RAX: 0000000000000001 RBX: ffff921793d10540 RCX: 000000000000001b [ 647.830083] RDX: 00000000080000ff RSI: 0000000000000001 RDI: ffff921793d10540 [ 647.831214] RBP: 0000000007fc0100 R08: ffffae5340c0bcd0 R09: 0000000000000003 [ 647.832388] R10: 0000007fc0100000 R11: 0000000000100000 R12: 00000000080000ff [ 647.833668] R13: ffffae5340c0bcd0 R14: ffff921793d10590 R15: 0000008000100000 [ 647.834782] FS: 00007f772ec90640(0000) GS:ffff921ce7a80000(0000) knlGS:0000000000000000 [ 647.836004] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 647.836990] CR2: 00007f02c27a3a20 CR3: 0000000101b0c006 CR4: 0000000000372ee0 [ 647.838107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 647.839283] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 647.840666] Call Trace: [ 647.841437] <TASK> [ 647.842107] intel_iommu_unmap_pages+0x93/0x140 [ 647.843112] __iommu_unmap+0x91/0x1b0 [ 647.844003] iommu_unmap+0x6a/0x95 [ 647.844885] vhost_vdpa_unmap+0x1de/0x1f0 [vhost_vdpa] [ 647.845985] vhost_vdpa_process_iotlb_msg+0xf0/0x90b [vhost_vdpa] [ 647.847235] ? _raw_spin_unlock+0x15/0x30 [ 647.848181] ? _copy_from_iter+0x8c/0x580 [ 647.849137] vhost_chr_write_iter+0xb3/0x430 [vhost] [ 647.850126] vfs_write+0x1e4/0x3a0 [ 647.850897] ksys_write+0x53/0xd0 [ 647.851688] do_syscall_64+0x3a/0x90 [ 647.852508] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 647.853457] RIP: 0033:0x7f7734ef9f4f [ 647.854408] Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 29 76 f8 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c8 [ 647.857217] RSP: 002b:00007f772ec8f040 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [ 647.858486] RAX: ffffffffffffffda RBX: 00000000fef00000 RCX: 00007f7734ef9f4f [ 647.859713] RDX: 0000000000000048 RSI: 00007f772ec8f090 RDI: 0000000000000010 [ 647.860942] RBP: 00007f772ec8f1a0 R08: 0000000000000000 R09: 0000000000000000 [ 647.862206] R10: 0000000000000001 R11: 0000000000000293 R12: 0000000000000010 [ 647.863446] R13: 0000000000000002 R14: 0000000000000000 R15: ffffffff01100000 [ 647.864692] </TASK> [ 647.865458] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs v] [ 647.874688] ---[ end trace 0000000000000000 ]---
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 4c8cf31885f69e86be0b5b9e6677a26797365e1d , < 26b7400c89b81e2f6de4f224ba1fdf06f293de31 (git)
Affected: 4c8cf31885f69e86be0b5b9e6677a26797365e1d , < 8b258a31c2e8d4d4e42be70a7c6ca35a5afbff0d (git)
Affected: 4c8cf31885f69e86be0b5b9e6677a26797365e1d , < e794070af224ade46db368271896b2685ff4f96b (git)
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    Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.0.19 , ≤ 6.0.* (semver)
Unaffected: 6.1.5 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/vhost/vdpa.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "26b7400c89b81e2f6de4f224ba1fdf06f293de31",
              "status": "affected",
              "version": "4c8cf31885f69e86be0b5b9e6677a26797365e1d",
              "versionType": "git"
            },
            {
              "lessThan": "8b258a31c2e8d4d4e42be70a7c6ca35a5afbff0d",
              "status": "affected",
              "version": "4c8cf31885f69e86be0b5b9e6677a26797365e1d",
              "versionType": "git"
            },
            {
              "lessThan": "e794070af224ade46db368271896b2685ff4f96b",
              "status": "affected",
              "version": "4c8cf31885f69e86be0b5b9e6677a26797365e1d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/vhost/vdpa.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.7"
            },
            {
              "lessThan": "5.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.19",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.5",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost_vdpa: fix the crash in unmap a large memory\n\nWhile testing in vIOMMU, sometimes Guest will unmap very large memory,\nwhich will cause the crash. To fix this, add a new function\nvhost_vdpa_general_unmap(). This function will only unmap the memory\nthat saved in iotlb.\n\nCall Trace:\n[  647.820144] ------------[ cut here ]------------\n[  647.820848] kernel BUG at drivers/iommu/intel/iommu.c:1174!\n[  647.821486] invalid opcode: 0000 [#1] PREEMPT SMP PTI\n[  647.822082] CPU: 10 PID: 1181 Comm: qemu-system-x86 Not tainted 6.0.0-rc1home_lulu_2452_lulu7_vhost+ #62\n[  647.823139] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-29-g6a62e0cb0dfe-prebuilt.qem4\n[  647.824365] RIP: 0010:domain_unmap+0x48/0x110\n[  647.825424] Code: 48 89 fb 8d 4c f6 1e 39 c1 0f 4f c8 83 e9 0c 83 f9 3f 7f 18 48 89 e8 48 d3 e8 48 85 c0 75 59\n[  647.828064] RSP: 0018:ffffae5340c0bbf0 EFLAGS: 00010202\n[  647.828973] RAX: 0000000000000001 RBX: ffff921793d10540 RCX: 000000000000001b\n[  647.830083] RDX: 00000000080000ff RSI: 0000000000000001 RDI: ffff921793d10540\n[  647.831214] RBP: 0000000007fc0100 R08: ffffae5340c0bcd0 R09: 0000000000000003\n[  647.832388] R10: 0000007fc0100000 R11: 0000000000100000 R12: 00000000080000ff\n[  647.833668] R13: ffffae5340c0bcd0 R14: ffff921793d10590 R15: 0000008000100000\n[  647.834782] FS:  00007f772ec90640(0000) GS:ffff921ce7a80000(0000) knlGS:0000000000000000\n[  647.836004] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  647.836990] CR2: 00007f02c27a3a20 CR3: 0000000101b0c006 CR4: 0000000000372ee0\n[  647.838107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[  647.839283] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[  647.840666] Call Trace:\n[  647.841437]  \u003cTASK\u003e\n[  647.842107]  intel_iommu_unmap_pages+0x93/0x140\n[  647.843112]  __iommu_unmap+0x91/0x1b0\n[  647.844003]  iommu_unmap+0x6a/0x95\n[  647.844885]  vhost_vdpa_unmap+0x1de/0x1f0 [vhost_vdpa]\n[  647.845985]  vhost_vdpa_process_iotlb_msg+0xf0/0x90b [vhost_vdpa]\n[  647.847235]  ? _raw_spin_unlock+0x15/0x30\n[  647.848181]  ? _copy_from_iter+0x8c/0x580\n[  647.849137]  vhost_chr_write_iter+0xb3/0x430 [vhost]\n[  647.850126]  vfs_write+0x1e4/0x3a0\n[  647.850897]  ksys_write+0x53/0xd0\n[  647.851688]  do_syscall_64+0x3a/0x90\n[  647.852508]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[  647.853457] RIP: 0033:0x7f7734ef9f4f\n[  647.854408] Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 29 76 f8 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c8\n[  647.857217] RSP: 002b:00007f772ec8f040 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\n[  647.858486] RAX: ffffffffffffffda RBX: 00000000fef00000 RCX: 00007f7734ef9f4f\n[  647.859713] RDX: 0000000000000048 RSI: 00007f772ec8f090 RDI: 0000000000000010\n[  647.860942] RBP: 00007f772ec8f1a0 R08: 0000000000000000 R09: 0000000000000000\n[  647.862206] R10: 0000000000000001 R11: 0000000000000293 R12: 0000000000000010\n[  647.863446] R13: 0000000000000002 R14: 0000000000000000 R15: ffffffff01100000\n[  647.864692]  \u003c/TASK\u003e\n[  647.865458] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs v]\n[  647.874688] ---[ end trace 0000000000000000 ]---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-30T12:15:27.765Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/26b7400c89b81e2f6de4f224ba1fdf06f293de31"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b258a31c2e8d4d4e42be70a7c6ca35a5afbff0d"
        },
        {
          "url": "https://git.kernel.org/stable/c/e794070af224ade46db368271896b2685ff4f96b"
        }
      ],
      "title": "vhost_vdpa: fix the crash in unmap a large memory",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50851",
    "datePublished": "2025-12-30T12:15:27.765Z",
    "dateReserved": "2025-12-30T12:06:07.134Z",
    "dateUpdated": "2025-12-30T12:15:27.765Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50851\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-12-30T13:15:59.797\",\"lastModified\":\"2025-12-31T20:43:05.160\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvhost_vdpa: fix the crash in unmap a large memory\\n\\nWhile testing in vIOMMU, sometimes Guest will unmap very large memory,\\nwhich will cause the crash. To fix this, add a new function\\nvhost_vdpa_general_unmap(). This function will only unmap the memory\\nthat saved in iotlb.\\n\\nCall Trace:\\n[  647.820144] ------------[ cut here ]------------\\n[  647.820848] kernel BUG at drivers/iommu/intel/iommu.c:1174!\\n[  647.821486] invalid opcode: 0000 [#1] PREEMPT SMP PTI\\n[  647.822082] CPU: 10 PID: 1181 Comm: qemu-system-x86 Not tainted 6.0.0-rc1home_lulu_2452_lulu7_vhost+ #62\\n[  647.823139] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-29-g6a62e0cb0dfe-prebuilt.qem4\\n[  647.824365] RIP: 0010:domain_unmap+0x48/0x110\\n[  647.825424] Code: 48 89 fb 8d 4c f6 1e 39 c1 0f 4f c8 83 e9 0c 83 f9 3f 7f 18 48 89 e8 48 d3 e8 48 85 c0 75 59\\n[  647.828064] RSP: 0018:ffffae5340c0bbf0 EFLAGS: 00010202\\n[  647.828973] RAX: 0000000000000001 RBX: ffff921793d10540 RCX: 000000000000001b\\n[  647.830083] RDX: 00000000080000ff RSI: 0000000000000001 RDI: ffff921793d10540\\n[  647.831214] RBP: 0000000007fc0100 R08: ffffae5340c0bcd0 R09: 0000000000000003\\n[  647.832388] R10: 0000007fc0100000 R11: 0000000000100000 R12: 00000000080000ff\\n[  647.833668] R13: ffffae5340c0bcd0 R14: ffff921793d10590 R15: 0000008000100000\\n[  647.834782] FS:  00007f772ec90640(0000) GS:ffff921ce7a80000(0000) knlGS:0000000000000000\\n[  647.836004] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n[  647.836990] CR2: 00007f02c27a3a20 CR3: 0000000101b0c006 CR4: 0000000000372ee0\\n[  647.838107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\\n[  647.839283] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\\n[  647.840666] Call Trace:\\n[  647.841437]  \u003cTASK\u003e\\n[  647.842107]  intel_iommu_unmap_pages+0x93/0x140\\n[  647.843112]  __iommu_unmap+0x91/0x1b0\\n[  647.844003]  iommu_unmap+0x6a/0x95\\n[  647.844885]  vhost_vdpa_unmap+0x1de/0x1f0 [vhost_vdpa]\\n[  647.845985]  vhost_vdpa_process_iotlb_msg+0xf0/0x90b [vhost_vdpa]\\n[  647.847235]  ? _raw_spin_unlock+0x15/0x30\\n[  647.848181]  ? _copy_from_iter+0x8c/0x580\\n[  647.849137]  vhost_chr_write_iter+0xb3/0x430 [vhost]\\n[  647.850126]  vfs_write+0x1e4/0x3a0\\n[  647.850897]  ksys_write+0x53/0xd0\\n[  647.851688]  do_syscall_64+0x3a/0x90\\n[  647.852508]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\\n[  647.853457] RIP: 0033:0x7f7734ef9f4f\\n[  647.854408] Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 29 76 f8 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c8\\n[  647.857217] RSP: 002b:00007f772ec8f040 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\\n[  647.858486] RAX: ffffffffffffffda RBX: 00000000fef00000 RCX: 00007f7734ef9f4f\\n[  647.859713] RDX: 0000000000000048 RSI: 00007f772ec8f090 RDI: 0000000000000010\\n[  647.860942] RBP: 00007f772ec8f1a0 R08: 0000000000000000 R09: 0000000000000000\\n[  647.862206] R10: 0000000000000001 R11: 0000000000000293 R12: 0000000000000010\\n[  647.863446] R13: 0000000000000002 R14: 0000000000000000 R15: ffffffff01100000\\n[  647.864692]  \u003c/TASK\u003e\\n[  647.865458] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs v]\\n[  647.874688] ---[ end trace 0000000000000000 ]---\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/26b7400c89b81e2f6de4f224ba1fdf06f293de31\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8b258a31c2e8d4d4e42be70a7c6ca35a5afbff0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e794070af224ade46db368271896b2685ff4f96b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Sightings

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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.