Vulnerability-Lookup

CNVD-2026-19044

Vulnerability from cnvd - Published: 2026-04-30

Title

Linux kernel本地权限提升漏洞（CNVD-2026-19044）

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存在本地权限提升漏洞，该漏洞源于crypto: algif_aead模块在处理AEAD操作时的逻辑缺陷，攻击者可利用该漏洞通过AF_ALG加密接口向任意可读文件的页缓存（page cache）写入受控的少量数据（PoC中为4字节块），进而篡改setuid等特权二进制文件，实现本地权限提升至root。

Severity

高

Patch Name

Linux kernel本地权限提升漏洞（CNVD-2026-19044）的补丁

Patch Description

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/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8

Reference

https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8

Impacted products

Name
Linux Linux kernel >=commit72548b093ee3，<commit a664bf3d603d

Show details on source website

JSON

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{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-31431",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-31431"
    }
  },
  "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\u672c\u5730\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ecrypto: algif_aead\u6a21\u5757\u5728\u5904\u7406AEAD\u64cd\u4f5c\u65f6\u7684\u903b\u8f91\u7f3a\u9677\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7AF_ALG\u52a0\u5bc6\u63a5\u53e3\u5411\u4efb\u610f\u53ef\u8bfb\u6587\u4ef6\u7684\u9875\u7f13\u5b58\uff08page cache\uff09\u5199\u5165\u53d7\u63a7\u7684\u5c11\u91cf\u6570\u636e\uff08PoC\u4e2d\u4e3a4\u5b57\u8282\u5757\uff09\uff0c\u8fdb\u800c\u7be1\u6539setuid\u7b49\u7279\u6743\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u5b9e\u73b0\u672c\u5730\u6743\u9650\u63d0\u5347\u81f3root\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/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-19044",
  "openTime": "2026-04-30",
  "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\u672c\u5730\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ecrypto: algif_aead\u6a21\u5757\u5728\u5904\u7406AEAD\u64cd\u4f5c\u65f6\u7684\u903b\u8f91\u7f3a\u9677\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u901a\u8fc7AF_ALG\u52a0\u5bc6\u63a5\u53e3\u5411\u4efb\u610f\u53ef\u8bfb\u6587\u4ef6\u7684\u9875\u7f13\u5b58\uff08page cache\uff09\u5199\u5165\u53d7\u63a7\u7684\u5c11\u91cf\u6570\u636e\uff08PoC\u4e2d\u4e3a4\u5b57\u8282\u5757\uff09\uff0c\u8fdb\u800c\u7be1\u6539setuid\u7b49\u7279\u6743\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u5b9e\u73b0\u672c\u5730\u6743\u9650\u63d0\u5347\u81f3root\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\u672c\u5730\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff08CNVD-2026-19044\uff09\u7684\u8865\u4e01",
  "products": {
    "product": "Linux Linux kernel \u003e=commit72548b093ee3\uff0c\u003ccommit a664bf3d603d"
  },
  "referenceLink": "https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8",
  "serverity": "\u9ad8",
  "submitTime": "2026-04-23",
  "title": "Linux kernel\u672c\u5730\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff08CNVD-2026-19044\uff09"
}

CVE-2026-31431 (GCVE-0-2026-31431)

Vulnerability from cvelistv5 – Published: 2026-04-22 08:15 – Updated: 2026-05-05 00:30

Title

crypto: algif_aead - Revert to operating out-of-place

Summary

In the Linux kernel, the following vulnerability has been resolved: crypto: algif_aead - Revert to operating out-of-place This mostly reverts commit 72548b093ee3 except for the copying of the associated data. There is no benefit in operating in-place in algif_aead since the source and destination come from different mappings. Get rid of all the complexity added for in-place operation and just copy the AD directly.

Severity ?

7.8 (High)


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

CWE

CWE-669 - Incorrect Resource Transfer Between Spheres

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/893d22e0135fa394d…
	https://git.kernel.org/stable/c/19d43105a97be0810…
	https://git.kernel.org/stable/c/961cfa271a918ad4a…
	https://git.kernel.org/stable/c/3115af9644c342b35…
	https://git.kernel.org/stable/c/8b88d99341f139e23…
	https://git.kernel.org/stable/c/fafe0fa2995a0f707…
	https://git.kernel.org/stable/c/ce42ee423e58dffa5…
	https://git.kernel.org/stable/c/a664bf3d603dc3bdc…

Impacted products

Vendor

Product

Version

Linux

Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 893d22e0135fa394db81df88697fba6032747667 (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 19d43105a97be0810edbda875f2cd03f30dc130c (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 961cfa271a918ad4ae452420e7c303149002875b (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 3115af9644c342b356f3f07a4dd1c8905cd9a6fc (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < 8b88d99341f139e23bdeb1027a2a3ae10d341d82 (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8 (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < ce42ee423e58dffa5ec03524054c9d8bfd4f6237 (git)
Affected: 72548b093ee38a6d4f2a19e6ef1948ae05c181f7 , < a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5 (git)

Linux

Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.10.254 , ≤ 5.10.* (semver)
Unaffected: 5.15.204 , ≤ 5.15.* (semver)
Unaffected: 6.1.170 , ≤ 6.1.* (semver)
Unaffected: 6.6.137 , ≤ 6.6.* (semver)
Unaffected: 6.12.85 , ≤ 6.12.* (semver)
Unaffected: 6.18.22 , ≤ 6.18.* (semver)
Unaffected: 6.19.12 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-31431",
                "options": [
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                  },
                  {
                    "Technical Impact": "total"
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                "role": "CISA Coordinator",
                "timestamp": "2026-04-29T00:00:00+00:00",
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        "problemTypes": [
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            ],
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            "url": "https://xint.io/blog/copy-fail-linux-distributions#the-fix-6"
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        "title": "CVE Program Container"
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    "cna": {
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          "product": "Linux",
          "programFiles": [
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.254",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.204",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.170",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.137",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.85",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.22",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.254",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.204",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.170",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.137",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.85",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.22",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.12",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "4.14",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: algif_aead - Revert to operating out-of-place\n\nThis mostly reverts commit 72548b093ee3 except for the copying of\nthe associated data.\n\nThere is no benefit in operating in-place in algif_aead since the\nsource and destination come from different mappings.  Get rid of\nall the complexity added for in-place operation and just copy the\nAD directly."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "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"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-30T09:32:06.731Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/893d22e0135fa394db81df88697fba6032747667"
        },
        {
          "url": "https://git.kernel.org/stable/c/19d43105a97be0810edbda875f2cd03f30dc130c"
        },
        {
          "url": "https://git.kernel.org/stable/c/961cfa271a918ad4ae452420e7c303149002875b"
        },
        {
          "url": "https://git.kernel.org/stable/c/3115af9644c342b356f3f07a4dd1c8905cd9a6fc"
        },
        {
          "url": "https://git.kernel.org/stable/c/8b88d99341f139e23bdeb1027a2a3ae10d341d82"
        },
        {
          "url": "https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8"
        },
        {
          "url": "https://git.kernel.org/stable/c/ce42ee423e58dffa5ec03524054c9d8bfd4f6237"
        },
        {
          "url": "https://git.kernel.org/stable/c/a664bf3d603dc3bdcf9ae47cc21e0daec706d7a5"
        }
      ],
      "title": "crypto: algif_aead - Revert to operating out-of-place",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31431",
    "datePublished": "2026-04-22T08:15:10.123Z",
    "dateReserved": "2026-03-09T15:48:24.089Z",
    "dateUpdated": "2026-05-05T00:30:43.498Z",
    "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.

Action not permitted

CNVD-2026-19044

CVE-2026-31431 (GCVE-0-2026-31431)

Tags

Sightings

Nomenclature