CVE-2026-74424: Linux kernel · fbcon: fix NULL pointer dereference for a console without vc_data
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 12:55 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +41
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A patch is available and should be applied to affected Linux kernel versions. The vendor advisory confirms that this issue is fixed. Users should update their Linux kernel to a patched version to mitigate this vulnerability.
Description
A null pointer dereference vulnerability in the Linux kernel's framebuffer console (fbcon) subsystem was fixed. The issue occurs when fbcon_new_modelist() processes consoles without valid vc_data, leading to a NULL pointer dereference. This can cause a denial of service (system crash). The vulnerability affects specific Linux kernel versions and has been patched.
References
- nvd.nist.gov/vuln/detail/CVE-2026-74424 (opens in a new tab)
- git.kernel.org/stable/c/5fae9a928482d4845bca169a3a098789203a1ca4 (opens in a new tab)
- git.kernel.org/stable/c/6617df8c246311c82cebf061a4cee55b9df60922 (opens in a new tab)
- git.kernel.org/stable/c/8e9b8b008f4036df0318870c5d754134ff1b94cc (opens in a new tab)
- git.kernel.org/stable/c/9b783b7e03dc78ec102edf618259a2b55911fc6a (opens in a new tab)
- git.kernel.org/stable/c/ac970358c5ca0775841bd2a56ce15dc464b99003 (opens in a new tab)
- git.kernel.org/stable/c/b134ad2f7c06b3c1098dcc95008e2045ff4b49b2 (opens in a new tab)
- git.kernel.org/stable/c/cc4382dc5134826a3936a6b08de17f7dc7abe232 (opens in a new tab)
- ubuntu.com/security/CVE-2026-74424 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-74424 (opens in a new tab)
- git.kernel.org/linus/5fae9a928482d4845bca169a3a098789203a1ca4 (opens in a new tab)
- ubuntu.com/security/notices/USN-8876-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-2 (opens in a new tab)