CVE-2026-74320: Linux kernel · fbdev: sm501fb: Fix buffer errors in OF binding code
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in de590cdf7efec8a0b6da90ae2ab5fc5df26810b9 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 18:10 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in de590cdf7efec8a0b6da90ae2ab5fc5df26810b9, d8421e09382cfe0bd2a044c8b0a822f64855dd4e, d374f76e1257ecc5d691a765c512ed2c29a44741 +5
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
This vulnerability has been fixed in the Linux kernel as indicated by the listed fixed commit versions. Users and administrators should update their Linux kernel to a version including these fixes. No additional mitigation is required once the kernel is updated.
Description
A vulnerability in the Linux kernel's sm501fb framebuffer driver involves buffer errors in the Open Firmware (OF) binding code. The flaw includes use-after-free, buffer overruns, and memory leaks related to handling frame buffer mode and EDID data. Improper memory management can lead to double frees and overwriting of static strings without length checks. This issue has been fixed in specific Linux kernel commits.
References
- 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/d374f76e1257ecc5d691a765c512ed2c29a44741 (opens in a new tab)
- git.kernel.org/stable/c/b2ff450f7f5cfc7143cab57c3ad70293ba8b822a (opens in a new tab)
- git.kernel.org/stable/c/9057e3f5db39f0ef0dac2f59f2bc59bf17e36c31 (opens in a new tab)
- git.kernel.org/stable/c/de590cdf7efec8a0b6da90ae2ab5fc5df26810b9 (opens in a new tab)
- git.kernel.org/stable/c/48cf0f4c6581ec90104cec9c5bf794a8bf347e30 (opens in a new tab)
- git.kernel.org/stable/c/d8421e09382cfe0bd2a044c8b0a822f64855dd4e (opens in a new tab)