Vulnerability-Lookup

CVE-2021-33639 (GCVE-0-2021-33639)

Vulnerability from cvelistv5 – Published: 2023-03-08 00:00 – Updated: 2025-03-04 20:24

Summary

REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-03-04 20:23 UTC

CWE

CWE-749 - Exposed Dangerous Method or Function

Assigner

openEuler mitre root

References

1 reference

URL	Tags
https://gitee.com/openeuler/kernel/commit/e4d0684…

Impacted products

1 product

Vendor	Product	Version	CPE status
n/a	kernel	Affected: <=4.19.90-2211.4.0.0177, <=5.10.0-60.67.0.92

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2021-33639

Vulnerability from fkie_nvd - Published: 2023-03-08 23:15 - Updated: 2026-06-17 03:54

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Summary

REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.

References

	URL	Tags
	securities@openeuler.org	https://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27	Permissions Required
	af854a3a-2127-422b-91ae-364da2661108	https://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27	Permissions Required

Impacted products

	Vendor	Product	Version
	openatom	openeuler_kernel	*
	openatom	openeuler_kernel	*

JSON

To clipboard

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GHSA-WQ34-QCH7-HR2G

Vulnerability from github – Published: 2023-03-09 00:30 – Updated: 2023-03-15 21:30

Details

REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.

Severity

7.5 (High)


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

Show details on source website

JSON

To clipboard

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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2023-03-08T23:15:00Z",
    "severity": "HIGH"
  },
  "details": "REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.",
  "id": "GHSA-wq34-qch7-hr2g",
  "modified": "2023-03-15T21:30:26Z",
  "published": "2023-03-09T00:30:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33639"
    },
    {
      "type": "WEB",
      "url": "https://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ]
}

GSD-2021-33639

Vulnerability from gsd - Updated: 2023-12-13 01:23

Details

REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.

Aliases

CVE-2021-33639

Aliases

CVE-2021-33639

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2021-33639",
    "id": "GSD-2021-33639"
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2021-33639"
      ],
      "details": "REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.",
      "id": "GSD-2021-33639",
      "modified": "2023-12-13T01:23:18.579746Z",
      "schema_version": "1.4.0"
    }
  },
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      "CVE_data_meta": {
        "ASSIGNER": "securities@openeuler.org",
        "ID": "CVE-2021-33639",
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      },
      "affects": {
        "vendor": {
          "vendor_data": [
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                    "product_name": "kernel",
                    "version": {
                      "version_data": [
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                          "version_value": "\u003c=4.19.90-2211.4.0.0177, \u003c=5.10.0-60.67.0.92"
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          }
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      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "CWE-749: Exposed Dangerous Method or Function"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27",
            "refsource": "MISC",
            "url": "https://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
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                "cpe23Uri": "cpe:2.3:o:openatom:openeuler_kernel:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "4.19.90-2211.4.0.0177",
                "vulnerable": true
              },
              {
                "cpe23Uri": "cpe:2.3:o:openatom:openeuler_kernel:*:*:*:*:*:*:*:*",
                "cpe_name": [],
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                "vulnerable": true
              }
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            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "NVD-CWE-noinfo"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27",
              "refsource": "MISC",
              "tags": [
                "Permissions Required"
              ],
              "url": "https://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV3": {
          "cvssV3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "exploitabilityScore": 3.9,
          "impactScore": 3.6
        }
      },
      "lastModifiedDate": "2023-03-15T18:47Z",
      "publishedDate": "2023-03-08T23:15Z"
    }
  }
}

OESA-2023-1143 (CVE-2023-0045)

Vulnerability from osv_openeuler – Published: 2023-03-04 11:05 – Updated: 2026-08-06 11:05 – Source website

Summary

kernel security update

Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

The Linux kernel does not correctly mitigate SMT attacks, as discovered through a strange pattern in the kernel API using STIBP as a mitigation[1 <https://docs.kernel.org/userspace-api/spec_ctrl.html>], leaving the process exposed for a short period of time after a syscall. The kernel also does not issue an IBPB immediately during the syscall. The ib_prctl_set [2 <https://elixir.bootlin.com/linux/v5.15.56/source/arch/x86/kernel/cpu/bugs.c#L1467>]function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update [3 <https://elixir.bootlin.com/linux/v5.15.56/source/arch/x86/kernel/process.c#L557>], but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall. The behavior is only corrected after a reschedule of the task happens. Furthermore, the kernel entrance (due to the syscall itself), does not issue an IBPB in the default scenarios (i.e., when the kernel protects itself via retpoline or eIBRS).(CVE-2023-0045)

REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified..(CVE-2021-33639)

Severity

6.7 (Medium)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-0045	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-33639	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "kernel-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "python2-perf-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-tools-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-source-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "python2-perf-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-debugsource-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "bpftool-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "perf-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "bpftool-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "python3-perf-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-tools-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "perf-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "python3-perf-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-tools-devel-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-devel-4.19.90-2302.5.0.0190.oe1.aarch64.rpm"
        ],
        "src": [
          "kernel-4.19.90-2302.5.0.0190.oe1.src.rpm"
        ],
        "x86_64": [
          "python3-perf-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-tools-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "python2-perf-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "perf-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-debugsource-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "perf-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-devel-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "python3-perf-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "bpftool-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "python2-perf-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-source-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-tools-devel-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "bpftool-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-tools-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP3",
        "name": "kernel",
        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-20.03-LTS-SP3"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.19.90-2302.5.0.0190.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\r\n\r\nThe Linux kernel does not correctly mitigate SMT attacks, as discovered\nthrough a strange pattern in the kernel API using STIBP as a mitigation[1\n\u0026lt;https://docs.kernel.org/userspace-api/spec_ctrl.html\u0026gt;], leaving the\nprocess exposed for a short period of time after a syscall. The kernel also\ndoes not issue an IBPB immediately during the syscall.\nThe ib_prctl_set [2\n\u0026lt;https://elixir.bootlin.com/linux/v5.15.56/source/arch/x86/kernel/cpu/bugs.c#L1467\u0026gt;]function\nupdates the Thread Information Flags (TIFs) for the task and updates the\nSPEC_CTRL MSR on the function __speculation_ctrl_update [3\n\u0026lt;https://elixir.bootlin.com/linux/v5.15.56/source/arch/x86/kernel/process.c#L557\u0026gt;],\nbut the IBPB is only issued on the next schedule, when the TIF bits are\nchecked. This leaves the victim vulnerable to values already injected on\nthe BTB, prior to the prctl syscall.\nThe behavior is only corrected after a reschedule of the task happens.\nFurthermore, the kernel entrance (due to the syscall itself), does not\nissue an IBPB in the default scenarios (i.e., when the kernel protects\nitself via retpoline or eIBRS).(CVE-2023-0045)\r\n\r\nREMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified..(CVE-2021-33639)",
  "id": "OESA-2023-1143",
  "modified": "2026-08-06T11:05:37Z",
  "published": "2023-03-04T11:05:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1143"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0045"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33639"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2023-0045",
    "CVE-2021-33639"
  ]
}

OESA-2023-1144 (CVE-2023-0240)

Vulnerability from osv_openeuler – Published: 2023-03-04 11:05 – Updated: 2026-08-06 11:05 – Source website

Summary

kernel security update

Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

There is a logic error in io_uring's implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.(CVE-2023-0240)

A memory leak flaw and potential divide by zero and Integer overflow was found in the Linux kernel V4L2 and vivid test code functionality. This issue occurs when a user triggers ioctls, such as VIDIOC_S_DV_TIMINGS ioctl. This could allow a local user to crash the system if vivid test code enabled.(CVE-2023-0615)

REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified..(CVE-2021-33639)

Severity

7.8 (High)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-0240	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-0615	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-0045	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-33639	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "kernel-devel-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "python3-perf-debuginfo-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "kernel-debuginfo-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "perf-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "perf-debuginfo-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "kernel-tools-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "kernel-debugsource-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "bpftool-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "bpftool-debuginfo-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "kernel-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "kernel-source-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "kernel-tools-devel-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "kernel-tools-debuginfo-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "kernel-headers-5.10.0-60.83.0.107.oe2203.aarch64.rpm",
          "python3-perf-5.10.0-60.83.0.107.oe2203.aarch64.rpm"
        ],
        "src": [
          "kernel-5.10.0-60.83.0.107.oe2203.src.rpm"
        ],
        "x86_64": [
          "kernel-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "kernel-tools-devel-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "bpftool-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "kernel-tools-debuginfo-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "python3-perf-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "kernel-debuginfo-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "kernel-source-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "python3-perf-debuginfo-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "kernel-debugsource-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "kernel-headers-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "perf-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "kernel-tools-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "perf-debuginfo-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "bpftool-debuginfo-5.10.0-60.83.0.107.oe2203.x86_64.rpm",
          "kernel-devel-5.10.0-60.83.0.107.oe2203.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS",
        "name": "kernel",
        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-22.03-LTS"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.0-60.83.0.107.oe2203"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "High"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\r\n\r\nThere is a logic error in io_uring\u0026apos;s implementation which can be used to trigger a use-after-free vulnerability leading to privilege escalation. In the io_prep_async_work function the assumption that the last io_grab_identity call cannot return false is not true, and in this case the function will use the init_cred or the previous linked requests identity to do operations instead of using the current identity. This can lead to reference counting issues causing use-after-free. We recommend upgrading past version 5.10.161.(CVE-2023-0240)\r\n\r\nA memory leak flaw and potential divide by zero and Integer overflow was found in the Linux kernel V4L2 and vivid test code functionality. This issue occurs when a user triggers ioctls, such as VIDIOC_S_DV_TIMINGS ioctl. This could allow a local user to crash the system if vivid test code enabled.(CVE-2023-0615)\r\n\r\nThe Linux kernel does not correctly mitigate SMT attacks, as discovered\nthrough a strange pattern in the kernel API using STIBP as a mitigation[1\n\u0026lt;https://docs.kernel.org/userspace-api/spec_ctrl.html\u0026gt;], leaving the\nprocess exposed for a short period of time after a syscall. The kernel also\ndoes not issue an IBPB immediately during the syscall.\nThe ib_prctl_set [2\n\u0026lt;https://elixir.bootlin.com/linux/v5.15.56/source/arch/x86/kernel/cpu/bugs.c#L1467\u0026gt;]function\nupdates the Thread Information Flags (TIFs) for the task and updates the\nSPEC_CTRL MSR on the function __speculation_ctrl_update [3\n\u0026lt;https://elixir.bootlin.com/linux/v5.15.56/source/arch/x86/kernel/process.c#L557\u0026gt;],\nbut the IBPB is only issued on the next schedule, when the TIF bits are\nchecked. This leaves the victim vulnerable to values already injected on\nthe BTB, prior to the prctl syscall.\nThe behavior is only corrected after a reschedule of the task happens.\nFurthermore, the kernel entrance (due to the syscall itself), does not\nissue an IBPB in the default scenarios (i.e., when the kernel protects\nitself via retpoline or eIBRS).(CVE-2023-0045)\r\n\r\nREMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified..(CVE-2021-33639)",
  "id": "OESA-2023-1144",
  "modified": "2026-08-06T11:05:37Z",
  "published": "2023-03-04T11:05:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1144"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0240"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0615"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0045"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33639"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2023-0240",
    "CVE-2023-0615",
    "CVE-2023-0045",
    "CVE-2021-33639"
  ]
}

OESA-2023-1146 (CVE-2023-0045)

Vulnerability from osv_openeuler – Published: 2023-03-04 11:05 – Updated: 2026-08-06 11:05 – Source website

Summary

kernel security update

Details

The Linux Kernel, the operating system core itself.

Security Fix(es):

REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified..(CVE-2021-33639)

Severity

6.7 (Medium)


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

References

URL

Type

	https://www.openeuler.org/en/security/safety-bull…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2023-0045	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2021-33639	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "perf-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-debugsource-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-devel-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "bpftool-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "python2-perf-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-tools-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-tools-devel-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "python3-perf-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "bpftool-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "python3-perf-debuginfo-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-tools-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "kernel-source-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "python2-perf-4.19.90-2302.5.0.0190.oe1.aarch64.rpm",
          "perf-4.19.90-2302.5.0.0190.oe1.aarch64.rpm"
        ],
        "src": [
          "kernel-4.19.90-2302.5.0.0190.oe1.src.rpm"
        ],
        "x86_64": [
          "perf-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "perf-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-devel-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-tools-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-source-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-tools-devel-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "python2-perf-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "python2-perf-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "python3-perf-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "bpftool-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-tools-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "bpftool-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "python3-perf-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-debuginfo-4.19.90-2302.5.0.0190.oe1.x86_64.rpm",
          "kernel-debugsource-4.19.90-2302.5.0.0190.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "kernel",
        "purl": "pkg:rpm/openEuler/kernel\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.19.90-2302.5.0.0190.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "The Linux Kernel, the operating system core itself.\r\n\r\nSecurity Fix(es):\r\n\r\nThe Linux kernel does not correctly mitigate SMT attacks, as discovered\nthrough a strange pattern in the kernel API using STIBP as a mitigation[1\n\u0026lt;https://docs.kernel.org/userspace-api/spec_ctrl.html\u0026gt;], leaving the\nprocess exposed for a short period of time after a syscall. The kernel also\ndoes not issue an IBPB immediately during the syscall.\nThe ib_prctl_set [2\n\u0026lt;https://elixir.bootlin.com/linux/v5.15.56/source/arch/x86/kernel/cpu/bugs.c#L1467\u0026gt;]function\nupdates the Thread Information Flags (TIFs) for the task and updates the\nSPEC_CTRL MSR on the function __speculation_ctrl_update [3\n\u0026lt;https://elixir.bootlin.com/linux/v5.15.56/source/arch/x86/kernel/process.c#L557\u0026gt;],\nbut the IBPB is only issued on the next schedule, when the TIF bits are\nchecked. This leaves the victim vulnerable to values already injected on\nthe BTB, prior to the prctl syscall.\nThe behavior is only corrected after a reschedule of the task happens.\nFurthermore, the kernel entrance (due to the syscall itself), does not\nissue an IBPB in the default scenarios (i.e., when the kernel protects\nitself via retpoline or eIBRS).(CVE-2023-0045)\r\n\r\nREMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified..(CVE-2021-33639)",
  "id": "OESA-2023-1146",
  "modified": "2026-08-06T11:05:37Z",
  "published": "2023-03-04T11:05:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1146"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-0045"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-33639"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "kernel security update",
  "upstream": [
    "CVE-2023-0045",
    "CVE-2021-33639"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.

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.

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Action not permitted

CVE-2021-33639 (GCVE-0-2021-33639)

FKIE_CVE-2021-33639

GHSA-WQ34-QCH7-HR2G

GSD-2021-33639

OESA-2023-1143 (CVE-2023-0045)

OESA-2023-1144 (CVE-2023-0240)

OESA-2023-1146 (CVE-2023-0045)

Tags

Sightings

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