{"id":"CVE-2026-23227","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-23227","generatedAt":"2026-10-28T10:46:50.424Z","title":"In the Linux kernel, the following vulnerability has been resolved: drm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free Exynos Virtual Display driver performs memory alloc/free operations without…","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/exynos: vidi: use ctx->lock to protect struct vidi_context member variables related to memory alloc/free\n\nExynos Virtual Display driver performs memory alloc/free operations\nwithout lock protection, which easily causes concurrency problem.\n\nFor example, use-after-free can occur in race scenario like this:\n```\n\tCPU0\t\t\t\tCPU1\t\t\t\tCPU2\n\t----\t\t\t\t----\t\t\t\t----\n  vidi_connection_ioctl()\n    if (vidi->connection) // true\n      drm_edid = drm_edid_alloc(); // alloc drm_edid\n      ...\n      ctx->raw_edid = drm_edid;\n      ...\n\t\t\t\t\t\t\t\tdrm_mode_getconnector()\n\t\t\t\t\t\t\t\t  drm_helper_probe_single_connector_modes()\n\t\t\t\t\t\t\t\t    vidi_get_modes()\n\t\t\t\t\t\t\t\t      if (ctx->raw_edid) // true\n\t\t\t\t\t\t\t\t        drm_edid_dup(ctx->raw_edid);\n\t\t\t\t\t\t\t\t          if (!drm_edid) // false\n\t\t\t\t\t\t\t\t          ...\n\t\t\t\tvidi_connection_ioctl()\n\t\t\t\t  if (vidi->connection) // false\n\t\t\t\t    drm_edid_free(ctx->raw_edid); // free drm_edid\n\t\t\t\t    ...\n\t\t\t\t\t\t\t\t          drm_edid_alloc(drm_edid->edid)\n\t\t\t\t\t\t\t\t            kmemdup(edid); // UAF!!\n\t\t\t\t\t\t\t\t            ...\n```\n\nTo prevent these vulns, at least in vidi_context, member variables related\nto memory alloc/free should be protected with ctx->lock.","published":"2026-02-18T16:22:32.000Z","lastModified":"2026-06-17T10:21:08.000Z","status":"Modified","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-416"],"affected":["linux/linux kernel"],"epss":{"score":0.00173,"percentile":0.06677,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/0cd2c155740dbd00868ac5a8ae5d14cd6b9ed385","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1b24d3e8792bcc050c70e8e0dea6b49c4fc63b13","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/52b330799e2d6f825ae2bb74662ec1b10eb954bb","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/56966a4cfa925ec24edb68ab652a740a7abe2c4d","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/60b75407c172e1f341a8a5097c5cbc97dbbdd893","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/92dd1f38d7db75374dcdaf54f1d79d67bffd54e5","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/9e1ef9396a1899925911b1729cb65665420268df","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/abfdf449fb3d7b42e85a1ad1c8694b768b1582f4","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23227","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}