VulnerabilityPublished 18 Oct 2026

CVE-2026-98815: Linux kernel · nvme: fix cdev lifetime

Source GCVE Database

Authoritative record:CVE-2026-98815· High

Not known to be exploited : upgrade to 9952f3882ecba709092379b71e02b09762b26f96 or 98b09ad7934482e64db4b4477d91e3bbf43adf4c soon.

Data as of 26 Oct 2026, 12:55 UTC

Severity

High

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 9952f3882ecba709092379b71e02b09762b26f96, 98b09ad7934482e64db4b4477d91e3bbf43adf4c

Exploitation evidence

Disclosed: evidence found.
CVE published 18 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-x2m3-gxmv-qw6j

What to do

Upgrade Linux kernel to 9952f3882ecba709092379b71e02b09762b26f96 or 98b09ad7934482e64db4b4477d91e3bbf43adf4c.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 2637baed78010eeaae274feb5b99ce90933fadfb, < 9952f3882ecba709092379b71e02b09762b26f96	Fixed in 9952f3882ecba709092379b71e02b09762b26f96
LinuxLinux	Affected ≥ 2637baed78010eeaae274feb5b99ce90933fadfb, < 98b09ad7934482e64db4b4477d91e3bbf43adf4c	Fixed in 98b09ad7934482e64db4b4477d91e3bbf43adf4c
LinuxLinux	Affected =5.13	Fixed in–

AI-suggested

A fix has been applied to the Linux kernel to properly manage the lifetime of the NVMe cdev and prevent use-after-free conditions. Users should update to a Linux kernel version that includes this fix. No additional mitigation steps are indicated by the vendor advisory.

Description

A use-after-free vulnerability in the Linux kernel NVMe driver related to character device (cdev) lifetime management has been resolved. The issue occurs in multipath mode when the NVMe namespace head is torn down, causing open cdev file operations to reference freed memory. This can lead to kernel memory corruption and potential crashes. The vulnerability was reported by the Sashiko bot and fixed in the Linux kernel.

References

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