arm64: mops: Do not dereference src reg for a set operation

{
  "id": "eb96016ebcb4ac1a2a273fdc881c0e0f7dbccb6ca93f6ef517b66eb9da0546eb",
  "url": "https://osv.dev/vulnerability/CVE-2025-37846",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "arm64: mops: Do not dereference src reg for a set operation",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: arm64: mops: Do not dereference src reg for a set operation The source register is not used for SET* and reading it can result in a UBSAN out-of-bounds array access error, specifically when the MOPS exception is taken from a SET* sequence with XZR (reg 31) as the source. Architecturally this is the only case where a src/dst/size field in the ESR can be reported as 31. Prior to 2de451a329cf662b the code in do_el0_mops() was benign as the use of pt_regs_read_reg() prevented the out-of-bounds access.",
    "evidence": "osv:CVE-2025-37846",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.24",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.13.12",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.14.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-37846",
      "aliases": [
        "CVE-2025-37846"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2de451a329cf662beeba71f63c7f83ee24ca6642"
                },
                {
                  "fixed": "eec737e17e5567e08148550a7f1d94d495b9fb17"
                },
                {
                  "fixed": "43267d934eacff6c70e15545d804ebbcab8a0bf5"
                },
                {
                  "fixed": "5f6022a74147675124b781fdc056b291850e7786"
                },
                {
                  "fixed": "a13bfa4fe0d6949cea14718df2d1fe84c38cd113"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37846.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.24"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.13.12"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.14.0"
                },
                {
                  "fixed": "6.14.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-37846.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.955521872Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/43267d934eacff6c70e15545d804ebbcab8a0bf5",
        "https://git.kernel.org/stable/c/5f6022a74147675124b781fdc056b291850e7786",
        "https://git.kernel.org/stable/c/a13bfa4fe0d6949cea14718df2d1fe84c38cd113",
        "https://git.kernel.org/stable/c/eec737e17e5567e08148550a7f1d94d495b9fb17",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37846.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-37846",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/37xxx/CVE-2025-37846.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-37846",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 514005,
  "published_at": "2025-05-09T06:41:54.648+00:00"
}