VulnerabilityPublished 23 Oct 2026

CVE-2026-99047: Linux kernel · gve: fix XSK buffer leak when rings are stopped

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in 73670ddb91a4d22e1deb3efd962242de1ec48e90 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · 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 73670ddb91a4d22e1deb3efd962242de1ec48e90, 506f9de069d07a72b9887ce3edd2fdf32f4953aa, 7a7e6bbbf0586c1f62f0cc7d9a2877d8a5e5aaf7

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 73670ddb91a4d22e1deb3efd962242de1ec48e90, 506f9de069d07a72b9887ce3edd2fdf32f4953aa or 7a7e6bbbf0586c1f62f0cc7d9a2877d8a5e5aaf7.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ c1fffc5d66a7147d557736c2341a511e0896d9ff, < 73670ddb91a4d22e1deb3efd962242de1ec48e90	Fixed in 73670ddb91a4d22e1deb3efd962242de1ec48e90
LinuxLinux	Affected ≥ c1fffc5d66a7147d557736c2341a511e0896d9ff, < 506f9de069d07a72b9887ce3edd2fdf32f4953aa	Fixed in 506f9de069d07a72b9887ce3edd2fdf32f4953aa
LinuxLinux	Affected ≥ c1fffc5d66a7147d557736c2341a511e0896d9ff, < 7a7e6bbbf0586c1f62f0cc7d9a2877d8a5e5aaf7	Fixed in 7a7e6bbbf0586c1f62f0cc7d9a2877d8a5e5aaf7
LinuxLinux	Affected =6.17	Fixed in–

AI-suggested

A fix is available in the Linux kernel as indicated by the provided commit hashes. Users running Linux kernel version 6.17 should apply the updates containing these fixes to prevent the XSK buffer leak when stopping rings.

Description

A vulnerability in the Linux kernel's GVE driver causes a buffer leak of XSK buffers when rings are stopped. Specifically, the driver fails to free XSK buffers when resetting ring state during queue stoppage, leading to resource leakage. This issue has been encountered in production environments and has been fixed in certain commits.

Impact

The vulnerability causes a resource leak of XSK buffers in the kernel, which can lead to degraded system performance or resource exhaustion in production environments using the affected Linux kernel version. There is no indication of direct code execution or privilege escalation from this leak alone.

Summary

The Linux kernel GVE driver did not free XSK buffers when resetting ring state as part of stopping queues, resulting in a leak of all XSK buffers posted to the NIC. The fix involves freeing XSK buffers attached to an allocated buf_state when stopping rings. This vulnerability affects Linux kernel version 6.17 and has been resolved in specific commits identified by their hashes.

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

Community reviews

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