CVE-2022-49948
vt: Clear selection before changing the font
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Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/1cf1930369c9dc428d827b60260c53271bff3285
- https://git.kernel.org/stable/c/2535431ae967ad17585513649625fea7db28d4db
- https://git.kernel.org/stable/c/566f9c9f89337792070b5a6062dff448b3e7977f
- https://git.kernel.org/stable/c/989201bb8c00b222235aff04e6200230d29dc7bb
- https://git.kernel.org/stable/c/c555cf04684fde39b5b0dd9fd80730030ee10c4a
References (8)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- HIGH
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