Vulnerability-Lookup

CNVD-2025-04674

Vulnerability from cnvd - Published: 2025-03-10

Title

Linux kernel tcmu_try_get_data_page内存错误引用漏洞

Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在内存错误引用漏洞，该漏洞源于tcmu_try_get_data_page未正确获取引用计数，攻击者可利用该漏洞导致页面释放后重用。

Severity

中

Patch Name

Linux kernel tcmu_try_get_data_page内存错误引用漏洞的补丁

Patch Description

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在内存错误引用漏洞，该漏洞源于tcmu_try_get_data_page未正确获取引用计数，攻击者可利用该漏洞导致页面释放后重用。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://git.kernel.org/stable/c/a6968f7a367f128d120447360734344d5a3d5336

Reference

https://nvd.nist.gov/vuln/detail/CVE-2022-49053

Impacted products

Name
Linux Kernel

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2022-49053",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2022-49053"
    }
  },
  "description": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\n\nLinux kernel\u5b58\u5728\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8etcmu_try_get_data_page\u672a\u6b63\u786e\u83b7\u53d6\u5f15\u7528\u8ba1\u6570\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u9875\u9762\u91ca\u653e\u540e\u91cd\u7528\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://git.kernel.org/stable/c/a6968f7a367f128d120447360734344d5a3d5336",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2025-04674",
  "openTime": "2025-03-10",
  "patchDescription": "Linux kernel\u662f\u7f8e\u56fdLinux\u57fa\u91d1\u4f1a\u7684\u5f00\u6e90\u64cd\u4f5c\u7cfb\u7edfLinux\u6240\u4f7f\u7528\u7684\u5185\u6838\u3002\r\n\r\nLinux kernel\u5b58\u5728\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8etcmu_try_get_data_page\u672a\u6b63\u786e\u83b7\u53d6\u5f15\u7528\u8ba1\u6570\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u5bfc\u81f4\u9875\u9762\u91ca\u653e\u540e\u91cd\u7528\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Linux kernel tcmu_try_get_data_page\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Kernel"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2022-49053",
  "serverity": "\u4e2d",
  "submitTime": "2025-03-05",
  "title": "Linux kernel tcmu_try_get_data_page\u5185\u5b58\u9519\u8bef\u5f15\u7528\u6f0f\u6d1e"
}

CVE-2022-49053 (GCVE-0-2022-49053)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:54 – Updated: 2026-08-05 08:53

Title

scsi: target: tcmu: Fix possible page UAF

Summary

In the Linux kernel, the following vulnerability has been resolved: scsi: target: tcmu: Fix possible page UAF tcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not take refcount properly and just returns page pointer. When tcmu_try_get_data_page() returns, the returned page may have been freed by tcmu_blocks_release(). We need to get_page() under cmdr_lock to avoid concurrent tcmu_blocks_release().

Severity

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-27 17:59 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux mitre root

References

7 references

URL	Tags
https://git.kernel.org/stable/c/d7c5d79e50be6e06b…
https://git.kernel.org/stable/c/e3e0e067d5b34e4a6…
https://git.kernel.org/stable/c/fb7a5115422fbd6a4…
https://git.kernel.org/stable/c/aec36b98a1bbaa84b…
https://git.kernel.org/stable/c/b7f3b5d70c834f49f…
https://git.kernel.org/stable/c/a9564d84ed9f6ee71…
https://git.kernel.org/stable/c/a6968f7a367f128d1…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 141685a39151aea95eb56562d2953e919c6c73da , < d7c5d79e50be6e06b669141e3db1f977a0dd4e8e (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < fb7a5115422fbd6a4d505e8844f1ef5529f10489 (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < aec36b98a1bbaa84bfd8299a306e4c12314af626 (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322 (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < a9564d84ed9f6ee71017d062d0d2182154294a4b (git) Affected: 141685a39151aea95eb56562d2953e919c6c73da , < a6968f7a367f128d120447360734344d5a3d5336 (git)
Linux	Linux	Affected: 4.12 Unaffected: 0 , < 4.12 (semver) Unaffected: 4.14.276 , ≤ 4.14.* (semver) Unaffected: 4.19.239 , ≤ 4.19.* (semver) Unaffected: 5.4.190 , ≤ 5.4.* (semver) Unaffected: 5.10.112 , ≤ 5.10.* (semver) Unaffected: 5.15.35 , ≤ 5.15.* (semver) Unaffected: 5.17.4 , ≤ 5.17.* (semver) Unaffected: 5.18 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49053",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-27T17:59:25.641949Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-27T18:02:30.241Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/target/target_core_user.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "lessThan": "d7c5d79e50be6e06b669141e3db1f977a0dd4e8e",
              "status": "affected",
              "version": "141685a39151aea95eb56562d2953e919c6c73da",
              "versionType": "git"
            },
            {
              "lessThan": "e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "versionType": "git"
            },
            {
              "lessThan": "aec36b98a1bbaa84bfd8299a306e4c12314af626",
              "status": "affected",
              "version": "141685a39151aea95eb56562d2953e919c6c73da",
              "versionType": "git"
            },
            {
              "lessThan": "b7f3b5d70c834f49f7d87a2f2ed1c6284d9a0322",
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              "versionType": "git"
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              "versionType": "git"
            },
            {
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              "version": "141685a39151aea95eb56562d2953e919c6c73da",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.12"
            },
            {
              "lessThan": "4.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.276",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.239",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.190",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.35",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.18",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "versionEndExcluding": "4.14.276",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.239",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.190",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.112",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.35",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.4",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18",
                  "versionStartIncluding": "4.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: tcmu: Fix possible page UAF\n\ntcmu_try_get_data_page() looks up pages under cmdr_lock, but it does not\ntake refcount properly and just returns page pointer. When\ntcmu_try_get_data_page() returns, the returned page may have been freed by\ntcmu_blocks_release().\n\nWe need to get_page() under cmdr_lock to avoid concurrent\ntcmu_blocks_release()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF is triggered in tcmu_vma_fault() when a local process faults on the mmap\u0027d TCMU UIO device (/dev/uioX); network I/O can only drive reclaim, not the use side.\nAC:L - A malicious TCMU handler controls page faults on the mmap and can drive command completion/allocation patterns that schedule tcmu_blocks_release(), so both sides of the race are attacker-influenced and retryable.\nPR:L - Exploitation requires opening/mmap\u0027ing an existing TCMU UIO device and acting as (or replacing) the userspace handler; TCMU\u2019s design assumes a malicious handler and no capability check exists on the fault path beyond ordinary local device access.\nUI:N - No separate victim action is required; the attacker triggers faults and reclaim themselves once they have the mapped TCMU device.\nS:U - Impact is confined to the local kernel/host authority (memory corruption/privilege escalation); this is not a VM/IOMMU/sandbox boundary escape.\nC:H - Page UAF in the fault path can map a freed and reallocated page into userspace, enabling arbitrary kernel/user memory disclosure.\nI:H - The same UAF/page remap primitive enables heap spraying and arbitrary writes/control-flow hijacking in the kernel.\nA:H - Use-after-free of a page during fault handling can cause kernel oops/panic even without a full exploit."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:53:37.868Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "url": "https://git.kernel.org/stable/c/e3e0e067d5b34e4a68e3cc55f8eebc413f56f8ed"
        },
        {
          "url": "https://git.kernel.org/stable/c/fb7a5115422fbd6a4d505e8844f1ef5529f10489"
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        },
        {
          "url": "https://git.kernel.org/stable/c/a6968f7a367f128d120447360734344d5a3d5336"
        }
      ],
      "title": "scsi: target: tcmu: Fix possible page UAF",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49053",
    "datePublished": "2025-02-26T01:54:26.806Z",
    "dateReserved": "2025-02-26T01:49:39.242Z",
    "dateUpdated": "2026-08-05T08:53:37.868Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

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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CNVD-2025-04674

CVE-2022-49053 (GCVE-0-2022-49053)

Tags

Sightings

Nomenclature

Related by attack behaviour