{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "5e266e2e0e19532c1b8e2e2bff1eb6ccf42e478a"
            },
            {
              "fixed": "86356f13598f59f5acb1754895747dcdaf65a254"
            },
            {
              "fixed": "5ff1effb047e465cde193d7df95988aa1520035e"
            },
            {
              "fixed": "3c91e51a53cf805e551e5dc8149cd0539a6dbb9d"
            },
            {
              "fixed": "a0a34a40ed299c9c7cff6af163a5b883ee9d6d73"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.30"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97604.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: vfb: defer cleanup until the last reference\n\nFBIOGETCMAP takes a shallow snapshot of info-\u003ecmap and performs the\nusercopy after dropping info-\u003elock. vfb_remove() frees the colormap\nimmediately after unregistering the framebuffer, even when an open file\nstill holds a reference to fb_info. A concurrent driver unbind can\ntherefore free the colormap while the ioctl copies it to userspace.\n\nKASAN reports:\n\n  BUG: KASAN: slab-use-after-free in _copy_to_user\n  Read of size 512 by task poc/125\n\n   _copy_to_user (./include/linux/instrumented.h:129 ./include/linux/uaccess.h:201 lib/usercopy.c:24)\n   fb_cmap_to_user (./include/linux/uaccess.h:230 drivers/video/fbdev/core/fbcmap.c:211)\n   do_fb_ioctl (drivers/video/fbdev/core/fb_chrdev.c:114)\n\n   Allocated by task 1:\n   fb_alloc_cmap_gfp (./include/linux/slab.h:973 ./include/linux/slab.h:1290 drivers/video/fbdev/core/fbcmap.c:108)\n   vfb_probe (drivers/video/fbdev/vfb.c:459)\n\n   Freed by task 124:\n   fb_dealloc_cmap (drivers/video/fbdev/core/fbcmap.c:151)\n   vfb_remove (drivers/video/fbdev/vfb.c:489)\n\nunregister_framebuffer() drops the registration reference, and fbdev calls\nfb_destroy after the last put_fb_info(). Move the registered framebuffer's\ncleanup into an fb_destroy callback so its colormap and screen buffer stay\nalive until all file references have been released.",
  "id": "CVE-2026-97604",
  "modified": "2026-09-27T03:30:22.828345528Z",
  "published": "2026-09-25T10:22:16.613Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c91e51a53cf805e551e5dc8149cd0539a6dbb9d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ff1effb047e465cde193d7df95988aa1520035e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/86356f13598f59f5acb1754895747dcdaf65a254"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a0a34a40ed299c9c7cff6af163a5b883ee9d6d73"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97604.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97604"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "fbdev: vfb: defer cleanup until the last reference"
}