VulnerabilityPublished 28 Oct 2026

CVE-2026-99188: Linux kernel · net: stmmac: dwmac1000: clear the RGMII status interrupt

Source GCVE Database

Authoritative record:CVE-2026-99188

Not known to be exploited : upgrade to affc6d572935282ef9ab1e0b790cbc31e5ad8bca or aa07285705f8d5bac464eb1c5b7412f8e88b91e1 soon.

Data as of 28 Oct 2026, 13:46 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Patch: Available – fixed in affc6d572935282ef9ab1e0b790cbc31e5ad8bca, aa07285705f8d5bac464eb1c5b7412f8e88b91e1

Exploitation evidence

Disclosed: evidence found.
CVE published 28 Oct 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.

ghsa-42r7-qxvg-gp4f

What to do

Upgrade Linux kernel to affc6d572935282ef9ab1e0b790cbc31e5ad8bca or aa07285705f8d5bac464eb1c5b7412f8e88b91e1.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 2e2c878a314175a4c3b76ee3be455f543438f472, < affc6d572935282ef9ab1e0b790cbc31e5ad8bca	Fixed in affc6d572935282ef9ab1e0b790cbc31e5ad8bca
LinuxLinux	Affected ≥ 2e2c878a314175a4c3b76ee3be455f543438f472, < aa07285705f8d5bac464eb1c5b7412f8e88b91e1	Fixed in aa07285705f8d5bac464eb1c5b7412f8e88b91e1
LinuxLinux	Affected =6.19	Fixed in–

AI-suggested

A patch is available that restores reading the GMAC_RGSMIIIS register in the interrupt status handler to clear the RGMII status interrupt. Applying this patch prevents the interrupt storm and system lockups on resume. Users should update their Linux kernel to a version including this fix. No other mitigation is indicated.

Description

A Linux kernel vulnerability in the stmmac driver for dwmac1000 causes a soft lockup and system hang during resume from low-power states due to an unhandled RGMII status interrupt. The issue arises because the driver stopped reading the GMAC_RGSMIIIS register, leaving the interrupt status pending and causing an interrupt storm that starves the CPU. A patch restores reading this register to clear the interrupt and prevent the lockup.

References

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