CVE-2026-74320: Linux kernel · fbdev: sm501fb: Fix buffer errors in OF binding code
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
- 0.2% chance of exploitation in 30 days – higher than 12% 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 to resolve these memory errors. The vendor advisory confirms that the issue has been fixed. Users should update their kernel to a patched version to mitigate this vulnerability.
Description
A vulnerability in the Linux kernel's sm501fb framebuffer driver was resolved, addressing buffer errors in the Open Firmware (OF) binding code. The issues included use-after-free, buffer overruns, and memory leaks related to handling frame buffer mode and EDID data. Improper memory management could lead to double frees and overwriting of static strings. This flaw affects specific Linux kernel versions and has been patched.
References
- nvd.nist.gov/vuln/detail/CVE-2026-74320 (opens in a new tab)
- git.kernel.org/stable/c/0bc3d909a49e1fd8b8c3f2160d526e672c40621d (opens in a new tab)
- git.kernel.org/stable/c/47008d59c60ed896085da95f8d4dd40e1677dd3a (opens in a new tab)
- git.kernel.org/stable/c/48cf0f4c6581ec90104cec9c5bf794a8bf347e30 (opens in a new tab)
- git.kernel.org/stable/c/9057e3f5db39f0ef0dac2f59f2bc59bf17e36c31 (opens in a new tab)
- git.kernel.org/stable/c/b2ff450f7f5cfc7143cab57c3ad70293ba8b822a (opens in a new tab)
- git.kernel.org/stable/c/d374f76e1257ecc5d691a765c512ed2c29a44741 (opens in a new tab)
- git.kernel.org/stable/c/d8421e09382cfe0bd2a044c8b0a822f64855dd4e (opens in a new tab)
- git.kernel.org/stable/c/de590cdf7efec8a0b6da90ae2ab5fc5df26810b9 (opens in a new tab)
- ubuntu.com/security/CVE-2026-74320 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-74320 (opens in a new tab)
- git.kernel.org/linus/d8421e09382cfe0bd2a044c8b0a822f64855dd4e (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)