CVE-2026-74424None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: fbcon: fix NULL pointer dereference for a console without vc_data fbcon_new_modelist() runs when a framebuffer's modelist changes. For each console mapped to it with f…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
fbcon: fix NULL pointer dereference for a console without vc_data
fbcon_new_modelist() runs when a framebuffer's modelist changes. For each console mapped to it with fb_display[i].mode set, it reads vc_cons[i].d and passes the vc_num to fbcon_set_disp(). This assumes a console with a mode set has a vc_data, but it can be NULL. fbcon_set_disp() sets fb_display[i].mode before it checks vc_data, and fbcon_deinit() leaves the mode set after the vc_data is freed. fbcon_new_modelist() then dereferences the NULL vc_data.
Keep fb_display[i].mode set only while the console has a vc_data. Check vc_data before setting the mode in fbcon_set_disp(), and clear the mode in fbcon_deinit(). The existing mode check in fbcon_new_modelist() then skips such consoles.
Linux >= d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e < 8e9b8b008f4036df0318870c5d754134ff1b94ccLinux >= d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e < cc4382dc5134826a3936a6b08de17f7dc7abe232Linux >= d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e < 9b783b7e03dc78ec102edf618259a2b55911fc6aLinux >= d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e < ac970358c5ca0775841bd2a56ce15dc464b99003Linux >= d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e < 6617df8c246311c82cebf061a4cee55b9df60922Linux >= d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e < b134ad2f7c06b3c1098dcc95008e2045ff4b49b2Linux >= d1baa4ffa677bf6986c460fcfd4cdaf8bfe66f0e < 5fae9a928482d4845bca169a3a098789203a1ca4Linux 2.6.23Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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