VulnerabilityPublished 23 Oct 2026

CVE-2026-99044: Linux kernel · ice: fix use-after-free in dynamic port cleanup

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ca8a6285b11d01e5a279b1aa7fb55b1a02ecebb1 : patch Linux kernel soon.

Data as of 26 Oct 2026, 14:00 UTC

Severity

High

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

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ca8a6285b11d01e5a279b1aa7fb55b1a02ecebb1, b98eb58ba2f8fe8e9bba1b8a3b94fa5602c6de84, 1402fc67d2f4e2e1fc7bf8ee0825b8ad994557ff +1

Exploitation evidence

Disclosed: evidence found.
CVE published 23 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.

What to do

Upgrade Linux kernel to ca8a6285b11d01e5a279b1aa7fb55b1a02ecebb1, b98eb58ba2f8fe8e9bba1b8a3b94fa5602c6de84, 1402fc67d2f4e2e1fc7bf8ee0825b8ad994557ff or 7c1344df1ae0579f57b97647e5203b06496ce10c.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ eda69d654c7edae21312f731e0308941cb2ee2a9, < ca8a6285b11d01e5a279b1aa7fb55b1a02ecebb1	Fixed in ca8a6285b11d01e5a279b1aa7fb55b1a02ecebb1
LinuxLinux	Affected ≥ eda69d654c7edae21312f731e0308941cb2ee2a9, < b98eb58ba2f8fe8e9bba1b8a3b94fa5602c6de84	Fixed in b98eb58ba2f8fe8e9bba1b8a3b94fa5602c6de84
LinuxLinux	Affected ≥ eda69d654c7edae21312f731e0308941cb2ee2a9, < 1402fc67d2f4e2e1fc7bf8ee0825b8ad994557ff	Fixed in 1402fc67d2f4e2e1fc7bf8ee0825b8ad994557ff
LinuxLinux	Affected ≥ eda69d654c7edae21312f731e0308941cb2ee2a9, < 7c1344df1ae0579f57b97647e5203b06496ce10c	Fixed in 7c1344df1ae0579f57b97647e5203b06496ce10c
LinuxLinux	Affected =6.12	Fixed in–

AI-suggested

A fix is available in the Linux kernel as indicated by the fixed commit versions. Users should update to a Linux kernel version that includes the patches identified by the fixed commit hashes to remediate this vulnerability.

Description

CVE-2026-99044 is a use-after-free vulnerability in the Linux kernel's ice driver related to dynamic port cleanup. The function ice_dealloc_dynamic_port() frees a VSI object before using its index to erase the dynamic port, causing a use-after-free condition. This flaw has been fixed by changing the order of operations to erase the xarray entry before freeing the VSI.

Impact

This use-after-free vulnerability could potentially lead to kernel memory corruption, which may cause system instability or could be leveraged for privilege escalation or denial of service. However, no known exploits in the wild have been reported.

Summary

The vulnerability in the Linux kernel's ice driver occurs because ice_dealloc_dynamic_port() accesses dyn_port->vsi->idx after the VSI has already been freed, leading to a use-after-free. The fix involves reversing the order of operations from ice_alloc_dynamic_port() by erasing the xarray entry before freeing the VSI, preventing access to freed memory.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 09:59 UTC

Technical details

References

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