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VulnerabilityPublished Updated

CVE-2026-74320: Linux kernel · fbdev: sm501fb: Fix buffer errors in OF binding code

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in de590cdf7efec8a0b6da90ae2ab5fc5df26810b9 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 18:10 UTC

Severity
Medium

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

  1. Disclosed: evidence found.

    CVE published 15 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 4295f9bf74a885da390abc49a3b42a011c1bb890, < de590cdf7efec8a0b6da90ae2ab5fc5df26810b9
Fixed in
  • de590cdf7efec8a0b6da90ae2ab5fc5df26810b9
LinuxLinuxAffected
  • ≥ 4295f9bf74a885da390abc49a3b42a011c1bb890, < d8421e09382cfe0bd2a044c8b0a822f64855dd4e
Fixed in
  • d8421e09382cfe0bd2a044c8b0a822f64855dd4e
LinuxLinuxAffected
  • ≥ 4295f9bf74a885da390abc49a3b42a011c1bb890, < d374f76e1257ecc5d691a765c512ed2c29a44741
Fixed in
  • d374f76e1257ecc5d691a765c512ed2c29a44741
LinuxLinuxAffected
  • ≥ 4295f9bf74a885da390abc49a3b42a011c1bb890, < b2ff450f7f5cfc7143cab57c3ad70293ba8b822a
Fixed in
  • b2ff450f7f5cfc7143cab57c3ad70293ba8b822a
LinuxLinuxAffected
  • ≥ 4295f9bf74a885da390abc49a3b42a011c1bb890, < 47008d59c60ed896085da95f8d4dd40e1677dd3a
Fixed in
  • 47008d59c60ed896085da95f8d4dd40e1677dd3a
LinuxLinuxAffected
  • ≥ 4295f9bf74a885da390abc49a3b42a011c1bb890, < 9057e3f5db39f0ef0dac2f59f2bc59bf17e36c31
Fixed in
  • 9057e3f5db39f0ef0dac2f59f2bc59bf17e36c31

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

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