{"uuid": "5715267a-37a7-4acf-bc04-0b573cc2d34f", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2022-50221", "type": "seen", "source": "https://t.me/DarkWebInformer_CVEAlerts/18729", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2022-50221\n\ud83d\udd25 CVSS Score: N/A\n\ud83d\udd39 Description: In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/fb-helper: Fix out-of-bounds access\n\nClip memory range to screen-buffer size to avoid out-of-bounds access\nin fbdev deferred I/O's damage handling.\n\nFbdev's deferred I/O can only track pages. From the range of pages, the\ndamage handler computes the clipping rectangle for the display update.\nIf the fbdev screen buffer ends near the beginning of a page, that page\ncould contain more scanlines. The damage handler would then track these\nnon-existing scanlines as dirty and provoke an out-of-bounds access\nduring the screen update. Hence, clip the maximum memory range to the\nsize of the screen buffer.\n\nWhile at it, rename the variables min/max to min_off/max_off in\ndrm_fb_helper_deferred_io(). This avoids confusion with the macros of\nthe same name.\n\ud83d\udccf Published: 2025-06-18T11:03:56.096Z\n\ud83d\udccf Modified: 2025-06-18T11:03:56.096Z\n\ud83d\udd17 References:\n1. https://git.kernel.org/stable/c/9c49ac792c639dbec0728b513329a32461f72253\n2. https://git.kernel.org/stable/c/ae25885bdf59fde40726863c57fd20e4a0642183", "creation_timestamp": "2025-06-18T11:38:33.000000Z"}