CNVD-2026-19044

Vulnerability from cnvd - Published: 2026-04-30
VLAI
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
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。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/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8

Reference
https://git.kernel.org/stable/c/fafe0fa2995a0f7073c1c358d7d3145bcc9aedd8
Impacted products
Name
Linux Linux kernel >=commit72548b093ee3,<commit a664bf3d603d
Show details on source website

{
  "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"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

Loading…

Loading…

Loading…

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


Loading…