CVE-2025-38198fbcon: Make sure modelist not set on unregistered console
Updated under an hour ago ()
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It affects Linux and 3 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Not yet received
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 409d6c95f9c68bb7046410a3502e26e454a1e636 before b3237d451bf3a4490cb1a76f3b7c91d9888f1c4b; from 409d6c95f9c68bb7046410a3502e26e454a1e636 before 519ba75728ee8cd561dce25fc52a2ec5c47171dc; from 409d6c95f9c68bb7046410a3502e26e454a1e636 before f28f1f578cd810779d01999c60618cda14c281dd; 409d6c95f9c68bb7046410a3502e26e454a1e636 builds before 54b28f7c567dd659e5f9562f518e4d7f3f6a367b; from 409d6c95f9c68bb7046410a3502e26e454a1e636 before cedc1b63394a866bf8663a3e40f4546f1d28c8d8 | CNA record |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.5 | CISA ADP |
References
- https://git.kernel.org/stable/c/b3237d451bf3a4490cb1a76f3b7c91d9888f1c4b
- https://git.kernel.org/stable/c/519ba75728ee8cd561dce25fc52a2ec5c47171dc
- https://git.kernel.org/stable/c/f28f1f578cd810779d01999c60618cda14c281dd
- https://git.kernel.org/stable/c/54b28f7c567dd659e5f9562f518e4d7f3f6a367b
- https://git.kernel.org/stable/c/cedc1b63394a866bf8663a3e40f4546f1d28c8d8
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.