{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-52967",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-52967"
  ],
  "published": "2026-06-24T16:31:02Z",
  "summary": "smb/client: fix possible infinite loop and oob read in symlink_data()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb/client: fix possible infinite loop and oob read in symlink_data()\n\nOn 32-bit architectures, the infinite loop is as follows:\n\n  len = p->ErrorDataLength == 0xfffffff8\n  u8 *next = p->ErrorContextData + len\n  next == p\n\nOn 32-bit architectures, the out-of-bounds read is as follows:\n\n  len = p->ErrorDataLength == 0xfffffff0\n  u8 *next = p->ErrorContextData + len\n  next == (u8 *)p - 8",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H"
    }
  ],
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    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-52967"
    },
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      "url": "https://git.kernel.org/stable/c/1cfa2d59f669db28d6292d10ff87ca6837c781b0"
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    "severity": {
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      "scenario": "AV:N - The vulnerable SMB client parser consumes an SMB2 CREATE error response supplied by a remote SMB server over the network. A malicious or compromised SMB share can send the crafted `STATUS_STOPPED_ON_SYMLINK` response.\nAC:L - The server directly controls `ErrorContextCount`, `ByteCount`, `ErrorId`, and `ErrorDataLength`, and no race or hard-to-hit state is required. Although the wraparound behavior is 32-bit specific, that is a deployment property rather than an attacker-uncontrolled exploitation condition.\nPR:N - The attacker needs no privileges on the victim system; they only need to operate or control the SMB server endpoint that the client connects to. The path can also be reached through guest or null-auth SMB sessions.\nUI:R - The victim client must mount/connect to the SMB share and perform a path operation such as lookup, stat, open, or create that causes an SMB2 CREATE response to be parsed. The remote server cannot trigger this parser without client-side filesystem activity.\nS:U - The affected component is the Linux kernel SMB client, and the impact is to the same kernel/client security authority. This is not a VM escape, IOMMU bypass, or cross-scope sandbox escape.\nC:H - The bug is an out-of-bounds kernel read in a server-controlled response parser, and the read is not strictly bounded to only a few harmless bytes. Following the required conservative rule, this is scored as high confidentiality impact.\nI:N - The defect advances a parser pointer incorrectly and reads from the wrong location, but it does not write out of bounds or provide a kernel memory write primitive. No direct integrity impact beyond normal malicious-server control of SMB content was identified.\nA:H - The crafted length can make the parser loop indefinitely on 32-bit systems, causing a reliable denial of service. Other malformed pointer positions can also lead to invalid kernel reads and possible oops conditions."
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}