fbcon: Make sure modelist not set on unregistered console
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 'fb_info *[32]' ... fbcon_info_from_console+0x192/0x1a0 drivers/video/fbdev/core/fbcon.c:122 fbcon_new_modelist+0xbf/0x2d0 drivers/video/fbdev/core/fbcon.c:3048 fb_new_modelist+0x328/0x440 drivers/video/fbdev/core/fbmem.c:673 store_modes+0x1c9/0x3e0 drivers/video/fbdev/core/fbsysfs.c:113 dev_attr_store+0x55/0x80 drivers/base/core.c:2439 static struct fb_info *fbcon_registered_fb[FB_MAX]; ... static signed char con2fb_map[MAX_NR_CONSOLES]; ... static struct fb_info *fbcon_info_from_console(int console) ... return fbcon_registered_fb[con2fb_map[console]]; If con2fb_map contains a -1 things go wrong here. Instead, return NULL, as callers of fbcon_info_from_console() are trying to compare against existing "info" pointers, so error handling should kick in correctly.
CVE-2025-38198
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-38198
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "409d6c95f9c68bb7046410a3502e26e454a1e636",
"lessThan": "b3237d451bf3a4490cb1a76f3b7c91d9888f1c4b",
"versionType": "git"
},
{
"status": "affected",
"version": "409d6c95f9c68bb7046410a3502e26e454a1e636",
"lessThan": "519ba75728ee8cd561dce25fc52a2ec5c47171dc",
"versionType": "git"
},
{
"status": "affected",
"version": "409d6c95f9c68bb7046410a3502e26e454a1e636",
"lessThan": "f28f1f578cd810779d01999c60618cda14c281dd",
"versionType": "git"
},
{
"status": "affected",
"version": "409d6c95f9c68bb7046410a3502e26e454a1e636",
"lessThan": "54b28f7c567dd659e5f9562f518e4d7f3f6a367b",
"versionType": "git"
},
{
"status": "affected",
"version": "409d6c95f9c68bb7046410a3502e26e454a1e636",
"lessThan": "cedc1b63394a866bf8663a3e40f4546f1d28c8d8",
"versionType": "git"
}
],
"programFiles": [
"drivers/video/fbdev/core/fbcon.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.142",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.95",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.35",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.15.4",
"versionType": "semver",
"lessThanOrEqual": "6.15.*"
},
{
"status": "unaffected",
"version": "6.16",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/video/fbdev/core/fbcon.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38198
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27020 · Revision 1
- Added to Heist Feed
- Publisher date