{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-31693",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-31693"
  ],
  "published": "2026-04-30T11:48:06Z",
  "summary": "cifs: some missing initializations on replay",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: some missing initializations on replay\n\nIn several places in the code, we have a label to signify\nthe start of the code where a request can be replayed if\nnecessary. However, some of these places were missing the\nnecessary reinitializations of certain local variables\nbefore replay.\n\nThis change makes sure that these variables get initialized\nafter the label.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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            "upstream_fixed": "6.12.75"
          },
          "1:6.12.47-1+rpt1": {
            "linux_commit": "359f37f0faefb712add32a39f98751aea67d5c1f",
            "upstream_version": "6.12.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.12.75"
          },
          "1:6.12.62-1+rpt1": {
            "linux_commit": "a1073743767f9e7fdc7017ababd2a07ea0c97c1c",
            "upstream_version": "6.12.62",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.12.75"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-31693"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c854ab481ece4b3e5f4c2e8b22824f015ff874a5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1d731e512134495e0ef490ade0e4d91dc0d515ec"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7c9ce68192eef14c777cb6ce17155d2eb2431aea"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c99e160938b627f6f28edee930e8abc157e84386"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/14f66f44646333d2bfd7ece36585874fd72f8286"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The vulnerable replay paths are reached through local CIFS filesystem operations such as ioctl(CIFS_QUERY_INFO), setxattr, and mkdir on an existing SMB/CIFS mount.\nAC:L - Replay is triggered by -EAGAIN/-ECONNABORTED reconnect conditions, which a controlled or malicious SMB server can force, and the local caller controls the ioctl/xattr/mkdir inputs across retries.\nPR:L - The strongest reachable path, PASSTHRU_QUERY_INFO in smb2_ioctl_query_info(), has no CAP_SYS_ADMIN check and can be invoked by an unprivileged user with access to a mounted CIFS file.\nUI:N - A local attacker can invoke the filesystem operation directly; no separate victim action is required once the CIFS mount is available.\nS:U - The vulnerability corrupts kernel memory in the same kernel security authority and does not cross a VM, IOMMU, or other separate security boundary.\nC:H - Missing reinitialization can leave freed heap pointers live across replay, creating use-after-free/double-free style memory corruption that can be leveraged for kernel memory disclosure.\nI:H - Kernel heap double-free/use-after-free conditions are memory corruption primitives that can plausibly be shaped into arbitrary write or control-flow compromise.\nA:H - Even without full exploitation, stale pointer reuse or double-free in these replay paths can crash or oops the kernel."
    }
  }
}