CVE-2026-53402

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: fbdev: fbcon: fix out-of-bounds read in err_out of fbcon_do_set_font() When fbcon_do_set_font() fails (e.g., due to a memory allocation failure inside vc_resize() under heavy memory pressure), it jumps to the `err_out` label to roll back the console state. However, the current rollback logic forgets to restore the `hi_font` state, leading to a severe state machine corruption. Earlier in the function, `set_vc_hi_font()` might be called to change `vc->vc_hi_font_mask` and mutate the screen buffer. If `vc_resize()` subsequentl...

Affected product and versions

Product

Linux Linux, linux kernel

Affected versions

>= 868749a7456dc48e93887a8474194e2ee6d6c21f < cb016bcb40c81e7b19c4ae6143babb366dae8e20, >= ebd6f886aa2447fcfcdce5450c9e1028e1d681bb < ac562193c36696513ae196171892e9338475c4bc, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < 3618a4c5b2591cfa83efe74f5b18c2d02b35c3f5, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < a7a526fbc847f07ad3a503c7382189be5ab68574, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < b5bb2c696e140c399cb874def2feedf61dee27d6, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < 076b1aa65f77a49bce5a48a4a55a397cfcafa2b8, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < 39815715cbcfabb16fc8c5f4a23deeda20f5df62, >= a5a923038d70d2d4a86cb4e3f32625a5ee6e7e24 < 8fdc8c2057eea08d40ce2c8eed41ff9e451c65c2, >= f08ccb792d3eaf1dc62d8cbf6a30d6522329f660, >= 5.10.249 < 5.10.261, >= 5.15.64 < 5.15.212, >= 5.19.6 < 5.20, >= 6.0, >= 5.19.6 < 6.0, >= 6.0.1 < 6.1.178, >= 6.2 < 6.6.145, >= 6.7 < 6.12.96, >= 6.13 < 6.18.39, >= 6.19 < 7.1.3, 6.0

Fixed versions

5.10.261, 5.15.212, 6.0, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.3

Technical data

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CWE

CWE-125