ghsa-x6wj-2wrr-74p6
Vulnerability from github
Published
2022-05-24 17:44
Modified
2022-07-31 00:00
Severity ?
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Details

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.

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{
   affected: [],
   aliases: [
      "CVE-2020-27170",
   ],
   database_specific: {
      cwe_ids: [
         "CWE-203",
      ],
      github_reviewed: false,
      github_reviewed_at: null,
      nvd_published_at: "2021-03-20T22:15:00Z",
      severity: "MODERATE",
   },
   details: "An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit.",
   id: "GHSA-x6wj-2wrr-74p6",
   modified: "2022-07-31T00:00:59Z",
   published: "2022-05-24T17:44:58Z",
   references: [
      {
         type: "ADVISORY",
         url: "https://nvd.nist.gov/vuln/detail/CVE-2020-27170",
      },
      {
         type: "WEB",
         url: "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8",
      },
      {
         type: "WEB",
         url: "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f232326f6966cf2a1d1db7bc917a4ce5f9f55f76",
      },
      {
         type: "WEB",
         url: "https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html",
      },
      {
         type: "WEB",
         url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FB6LUXPEIRLZH32YXWZVEZAD4ZL6SDK2",
      },
      {
         type: "WEB",
         url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QRTPQE73ANG7D6M4L4PK5ZQDPO4Y2FVD",
      },
      {
         type: "WEB",
         url: "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG",
      },
      {
         type: "WEB",
         url: "https://www.openwall.com/lists/oss-security/2021/03/19/2",
      },
      {
         type: "WEB",
         url: "http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html",
      },
      {
         type: "WEB",
         url: "http://www.openwall.com/lists/oss-security/2021/03/24/4",
      },
   ],
   schema_version: "1.4.0",
   severity: [
      {
         score: "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
         type: "CVSS_V3",
      },
   ],
}


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