{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "959bf2fd03b59fc107584c21425f3dc73c49f762"
            },
            {
              "fixed": "d69ab4480e49bf925f4781afcc9f284affcb96b6"
            },
            {
              "fixed": "390742871a723b52de9b92a94c0d1c85a2531e3e"
            },
            {
              "fixed": "843ace1d0a39e9b1cfcbfb3856a7b0fbdd9cd003"
            },
            {
              "fixed": "8cf2093f5372952a9ebc805c418d45df7112cd14"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.54"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98248.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64: percpu: Fix LSE operations on {8,16}-bit types\n\nThe assembly for __percpu_##name##_case_##sz() and\n__percpu_##name##_return_case_##sz() doesn't use the 'sfx' macro\nargument to form the LSE instruction. Without 'sfx', a W register\nargument will imply a 32-bit memory location, and consequently\n{8,16}-bit ops will erroneously read and write 32 bits of memory when\nthe LSE instruction is used.\n\nFix this by appending 'sfx' to 'op_lse' to LSE instruction. It is not\nnecessary (and not valid) to append 'sfx' to 'op_llsc', as 'op_llsc' is\na register-register operation which does not access memory (and does not\ntake a size suffix).",
  "id": "CVE-2026-98248",
  "modified": "2026-10-07T02:30:23.461422103Z",
  "published": "2026-10-06T08:45:16.693Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/390742871a723b52de9b92a94c0d1c85a2531e3e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/843ace1d0a39e9b1cfcbfb3856a7b0fbdd9cd003"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8cf2093f5372952a9ebc805c418d45df7112cd14"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d69ab4480e49bf925f4781afcc9f284affcb96b6"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98248.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98248"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "arm64: percpu: Fix LSE operations on {8,16}-bit types"
}