{"id":"CVE-2022-49948","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nvt: Clear selection before changing the font\n\nWhen changing the console font with ioctl(KDFONTOP) the new font size\ncan be bigger than the previous font","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nvt: Clear selection before changing the font\n\nWhen changing the console font with ioctl(KDFONTOP) the new font size\ncan be bigger than the previous font. A previous sel…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-125"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel < 4.9.328","linux_kernel >= 4.10, < 4.14.293","linux_kernel >= 4.15, < 4.19.258","linux_kernel >= 4.20, < 5.4.213","linux_kernel >= 5.5, < 5.10.142","linux_kernel >= 5.11, < 5.15.66","linux_kernel >= 5.16, < 5.19.8","linux_kernel = 6.0"],"patched":["linux_kernel 5.19.8"],"published":"2025-06-18","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:17:26.047","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-49948","references":[{"url":"https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c904fe03c4bd1f356a58797d39e2a5d0ca15cefc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e9ba4611ddf676194385506222cce7b0844e708e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f74b4a41c5d7c9522469917e3072e55d435efd9e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00274,"epssPercentile":0.19647,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:29:48.514469Z"},"ingestedAt":"2026-10-15T21:45:11.286Z","slug":"CVE-2022-49948","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nvt: Clear selection before changing the font\n\nWhen changing the console font with ioctl(KDFONTOP) the new font size\ncan be bigger than the previous font. A previous selection may thus now\nbe outside of the new screen size and thus trigger out-of-bounds\naccesses to graphics memory if the selection is removed in\nvc_do_resize().\n\nPrevent such out-of-memory accesses by dropping the selection before the\nvarious con_font_set() console handlers are called.\n\n## Affected\n\n- `linux_kernel < 4.9.328`\n- `linux_kernel >= 4.10, < 4.14.293`\n- `linux_kernel >= 4.15, < 4.19.258`\n- `linux_kernel >= 4.20, < 5.4.213`\n- `linux_kernel >= 5.5, < 5.10.142`\n- `linux_kernel >= 5.11, < 5.15.66`\n- `linux_kernel >= 5.16, < 5.19.8`\n- `linux_kernel = 6.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 5.19.8`","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}