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CVE-2025-38685 The advisory has been revoked - it doesn't affect any version of package kernel-zfcpdump-modules-internal  (opens in a new tab)

Threat Intelligence

EPSS
0.06% (18th percentile)

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  • Snyk IDSNYK-CENTOS9-KERNELZFCPDUMPMODULESINTERNAL-12498570
  • published5 Sept 2025
  • disclosed4 Sept 2025
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Introduced: 4 Sep 2025

NewCVE-2025-38685  (opens in a new tab)

Amendment

The Centos security team deemed this advisory irrelevant for Centos:9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-zfcpdump-modules-internal package and not the kernel-zfcpdump-modules-internal package as distributed by Centos.

In the Linux kernel, the following vulnerability has been resolved:

fbdev: Fix vmalloc out-of-bounds write in fast_imageblit

This issue triggers when a userspace program does an ioctl FBIOPUT_CON2FBMAP by passing console number and frame buffer number. Ideally this maps console to frame buffer and updates the screen if console is visible.

As part of mapping it has to do resize of console according to frame buffer info. if this resize fails and returns from vc_do_resize() and continues further. At this point console and new frame buffer are mapped and sets display vars. Despite failure still it continue to proceed updating the screen at later stages where vc_data is related to previous frame buffer and frame buffer info and display vars are mapped to new frame buffer and eventully leading to out-of-bounds write in fast_imageblit(). This bheviour is excepted only when fg_console is equal to requested console which is a visible console and updates screen with invalid struct references in fbcon_putcs().