CVE-2026-80580: fbdev: bound mode sysfs output to the sysfs buffer

lowCVSS 3.3CVE-2026-80580

CSIRTS triage

vendor: Linux product: Linux kernel Information disclosure

What: fbdev sysfs mode output is not bounded to the sysfs buffer, allowing buffer overread.
Who is affected: Systems using fbdev with sysfs interface exposed; typically local access required.
Urgency: Low priority; bounded disclosure with limited exploitability.
Action: Apply patch limiting fbdev mode sysfs output to sysfs buffer size.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: low — CVSS 3.3
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80580

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-805800.11% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-80580	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highCVE-2026-80580: In the Linux kernel, the following vulnerability has been resolved: fbdev: bound mode sysfs ou…nvd

Recent advisories for fbdev

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

unknownCVE-2026-89599: In the Linux kernel, the following vulnerability has been resolved: fbdev: omapfb: panel-dsi-c…nvd · 2026-09-11
unknownCVE-2026-89598: In the Linux kernel, the following vulnerability has been resolved: fbdev: ssd1307fb: defer I2…nvd · 2026-09-11
unknownCVE-2026-89597: In the Linux kernel, the following vulnerability has been resolved: fbdev: uvesafb: unregister…nvd · 2026-09-11
mediumCVE-2026-80785: fbdev: serialize mode sysfs access with lock_fb_info()msrc · 2026-09-08
unknownCVE-2026-80786: In the Linux kernel, the following vulnerability has been resolved: fbdev: Wrap user-invoked c…nvd · 2026-09-04
unknownCVE-2026-80785: In the Linux kernel, the following vulnerability has been resolved: fbdev: serialize mode sysf…nvd · 2026-09-04