CVE-2022-49948 (GCVE-0-2022-49948)
Vulnerability from cvelistv5
Published
2025-06-18 11:00
Modified
2025-12-23 13:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: vt: Clear selection before changing the font When changing the console font with ioctl(KDFONTOP) the new font size can be bigger than the previous font. A previous selection may thus now be outside of the new screen size and thus trigger out-of-bounds accesses to graphics memory if the selection is removed in vc_do_resize(). Prevent such out-of-memory accesses by dropping the selection before the various con_font_set() console handlers are called.
References
Impacted products
Vendor Product Version
Linux Linux Version: 009e39ae44f4191188aeb6dfbf661b771dbbe515
Version: 009e39ae44f4191188aeb6dfbf661b771dbbe515
Version: 009e39ae44f4191188aeb6dfbf661b771dbbe515
Version: 009e39ae44f4191188aeb6dfbf661b771dbbe515
Version: 009e39ae44f4191188aeb6dfbf661b771dbbe515
Version: 009e39ae44f4191188aeb6dfbf661b771dbbe515
Version: 009e39ae44f4191188aeb6dfbf661b771dbbe515
Version: 009e39ae44f4191188aeb6dfbf661b771dbbe515
Version: e60f8fcce05042e8f8cea25ee81fecc1222114cf
Version: 5812a9bc9d68a82c2cc839f88e6f7a05093ab39d
Version: 863ad19fd654c485e3beec3575c4d74a1e74369e
Version: dbc3fd44f957a39407e889287bf61fa0ef3ecc14
Version: 0b2a0a58ad22f9d6dfc641bc5ec46057493f22a5
Version: 9f2d48f0745f921040df91bfe8fa7f0339cd7497
Version: 3425e397fb23cc2e8e6fb8f5b8226dcb447e84dd
Version: eeae0a12a16650ff494d5faefa371cd9e7079575
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Al cambiar la fuente de la consola con ioctl(KDFONTOP), el nuevo tama\u00f1o de fuente puede ser mayor que el anterior. Por lo tanto, una selecci\u00f3n anterior podr\u00eda quedar fuera del nuevo tama\u00f1o de pantalla y, por lo tanto, provocar accesos fuera de los l\u00edmites a la memoria gr\u00e1fica si se elimina la selecci\u00f3n en vc_do_resize(). 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  }
}


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