CVE-2025-38198

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Source
https://cve.org/CVERecord?id=CVE-2025-38198
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38198.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38198
Downstream
Related
Published
2025-07-04T13:37:20.588Z
Modified
2026-03-20T12:42:44.449531Z
Summary
fbcon: Make sure modelist not set on unregistered console
Details

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

fbcon: Make sure modelist not set on unregistered console

It looks like attempting to write to the "store_modes" sysfs node will run afoul of unregistered consoles:

UBSAN: array-index-out-of-bounds in drivers/video/fbdev/core/fbcon.c:122:28 index -1 is out of range for type 'fbinfo *[32]' ... fbconinfofromconsole+0x192/0x1a0 drivers/video/fbdev/core/fbcon.c:122 fbconnewmodelist+0xbf/0x2d0 drivers/video/fbdev/core/fbcon.c:3048 fbnewmodelist+0x328/0x440 drivers/video/fbdev/core/fbmem.c:673 storemodes+0x1c9/0x3e0 drivers/video/fbdev/core/fbsysfs.c:113 devattr_store+0x55/0x80 drivers/base/core.c:2439

static struct fbinfo *fbconregisteredfb[FBMAX]; ... static signed char con2fbmap[MAXNRCONSOLES]; ... static struct fbinfo *fbconinfofromconsole(int console) ... return fbconregisteredfb[con2fbmap[console]];

If con2fbmap contains a -1 things go wrong here. Instead, return NULL, as callers of fbconinfofromconsole() are trying to compare against existing "info" pointers, so error handling should kick in correctly.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38198.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
409d6c95f9c68bb7046410a3502e26e454a1e636
Fixed
b3237d451bf3a4490cb1a76f3b7c91d9888f1c4b
Fixed
519ba75728ee8cd561dce25fc52a2ec5c47171dc
Fixed
f28f1f578cd810779d01999c60618cda14c281dd
Fixed
54b28f7c567dd659e5f9562f518e4d7f3f6a367b
Fixed
cedc1b63394a866bf8663a3e40f4546f1d28c8d8

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38198.json"