vulnerability

Oracle Linux: CVE-2025-40304: ELSA-2026-2282: kernel security update (MODERATE) (Multiple Advisories)

Severity
6
CVSS
(AV:L/AC:L/Au:S/C:C/I:P/A:C)
Published
Dec 8, 2025
Added
Jan 15, 2026
Modified
Feb 11, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:
fbdev: Add bounds checking in bit_putcs to fix vmalloc-out-of-bounds
Add bounds checking to prevent writes past framebuffer boundaries when
rendering text near screen edges. Return early if the Y position is off-screen
and clip image height to screen boundary. Break from the rendering loop if the
X position is off-screen. When clipping image width to fit the screen, update
the character count to match the clipped width to prevent buffer size
mismatches.
Without the character count update, bit_putcs_aligned and bit_putcs_unaligned
receive mismatched parameters where the buffer is allocated for the clipped
width but cnt reflects the original larger count, causing out-of-bounds writes.

Solutions

oracle-linux-upgrade-kerneloracle-linux-upgrade-kernel-uek
Title
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