CVE-2022-49948High· 7.8▾ TwilightIn 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 sel…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Oct 15.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
0.3% → 0.3%
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.
linux_kernel < 4.9.328linux_kernel >= 4.10, < 4.14.293linux_kernel >= 4.15, < 4.19.258linux_kernel >= 4.20, < 5.4.213linux_kernel >= 5.5, < 5.10.142linux_kernel >= 5.11, < 5.15.66linux_kernel >= 5.16, < 5.19.8linux_kernel = 6.0Upgrade past the affected range:
linux_kernel 5.19.8Connected by shared product, vendor, weakness, or advisory.
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