fbcon: Make sure modelist not set on unregistered console

{
  "id": "3727c7cf3b28eb6332a3d115d97d36f2429731af7b19ceaf8aa59f5302fb0ca3",
  "url": "https://osv.dev/vulnerability/CVE-2025-38198",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "fbcon: Make sure modelist not set on unregistered console",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: fbcon: Make sure modelist not set on unregistered console It looks like attempting to write to the \"store_modes\" sysfs node will run afoul of unregistered consoles: UBSAN: array-index-out-of-bounds in drivers/video/fbdev/core/fbcon.c:122:28 index -1 is out of range for type 'fb_info *[32]' ... fbcon_info_from_console+0x192/0x1a0 drivers/video/fbdev/core/fbcon.c:122 fbcon_new_modelist+0xbf/0x2d0 drivers/video/fbdev/core/fbcon.c:3048 fb_new_modelist+0x328/0x440 drivers/video/fbdev/core/fbmem.c:673 store_modes+0x1c9/0x3e0 drivers/video/fbdev/core/fbsysfs.c:113 dev_attr_store+0x55/0x80 drivers/base/core.c:2439 static struct fb_info *fbcon_registered_fb[FB_MAX]; ... static signed char con2fb_map[MAX_NR_CONSOLES]; ... static struct fb_info *fbcon_info_from_console(int console) ... return fbcon_registered_fb[con2fb_map[console]]; If con2fb_map contains a -1 things go wrong here. Instead, return NULL, as callers of fbcon_info_from_console() are trying to compare against existing \"info\" pointers, so error handling should kick in correctly.",
    "evidence": "osv:CVE-2025-38198",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.1.142",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.95",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.35",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.15.4",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-38198",
      "aliases": [
        "CVE-2025-38198"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "409d6c95f9c68bb7046410a3502e26e454a1e636"
                },
                {
                  "fixed": "b3237d451bf3a4490cb1a76f3b7c91d9888f1c4b"
                },
                {
                  "fixed": "519ba75728ee8cd561dce25fc52a2ec5c47171dc"
                },
                {
                  "fixed": "f28f1f578cd810779d01999c60618cda14c281dd"
                },
                {
                  "fixed": "54b28f7c567dd659e5f9562f518e4d7f3f6a367b"
                },
                {
                  "fixed": "cedc1b63394a866bf8663a3e40f4546f1d28c8d8"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38198.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.19.0"
                },
                {
                  "fixed": "6.1.142"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.95"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.35"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.15.4"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38198.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.664777129Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-082556.html",
        "https://git.kernel.org/stable/c/519ba75728ee8cd561dce25fc52a2ec5c47171dc",
        "https://git.kernel.org/stable/c/54b28f7c567dd659e5f9562f518e4d7f3f6a367b",
        "https://git.kernel.org/stable/c/b3237d451bf3a4490cb1a76f3b7c91d9888f1c4b",
        "https://git.kernel.org/stable/c/cedc1b63394a866bf8663a3e40f4546f1d28c8d8",
        "https://git.kernel.org/stable/c/f28f1f578cd810779d01999c60618cda14c281dd",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38198.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38198",
        "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/2025/38xxx/CVE-2025-38198.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38198",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 510253,
  "published_at": "2025-07-04T13:37:20.588+00:00"
}