VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-92505: Linux kernel · iommu/amd: Fix undefined behavior in devid_write debugfs function

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 843e149989665f8309ad2efe6048dc76591e1f94 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 843e149989665f8309ad2efe6048dc76591e1f94, 99d42aef089a07cfb1d404a7227ac9dc7628b497, 8aabe0fba01486b5d893e708b05a8fa7f1b7efbb

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 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.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to 843e149989665f8309ad2efe6048dc76591e1f94, 99d42aef089a07cfb1d404a7227ac9dc7628b497 or 8aabe0fba01486b5d893e708b05a8fa7f1b7efbb.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 2e98940f123d9c69d4759078aea9a536244c98d3, < 843e149989665f8309ad2efe6048dc76591e1f94	Fixed in 843e149989665f8309ad2efe6048dc76591e1f94
LinuxLinux	Affected ≥ 2e98940f123d9c69d4759078aea9a536244c98d3, < 99d42aef089a07cfb1d404a7227ac9dc7628b497	Fixed in 99d42aef089a07cfb1d404a7227ac9dc7628b497
LinuxLinux	Affected ≥ 2e98940f123d9c69d4759078aea9a536244c98d3, < 8aabe0fba01486b5d893e708b05a8fa7f1b7efbb	Fixed in 8aabe0fba01486b5d893e708b05a8fa7f1b7efbb
LinuxLinux	Affected =6.17	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Fix undefined behavior in devid_write debugfs function When for_each_pci_segment() loop completes without finding a matching segment, the pci_seg pointer is not NULL but points to an invalid memory location (the list head). Accessing pci_seg->id after the loop causes undefined behavior. Fix this by handling the successful case inside the loop and returning -EINVAL after the loop if no matching segment is found.

References

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