VulnerabilityPublished 17 Sep 2026Updated 21 Oct 2026

CVE-2026-90385: Linux kernel · md/raid1: create serial pool adding rdev to array with serialize_policy=1

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in f9e4364449f7ca6917f3599eb32064dba5b7b147 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:07 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% 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 f9e4364449f7ca6917f3599eb32064dba5b7b147, c02d675e81468003e4f2253b616c53729070d712, 140234b2380ffb8ffb0cfc46fee0e822f43adef7 +2

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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 69b00b5bb23552d43e8bbed73ef6624604bb94a2, < f9e4364449f7ca6917f3599eb32064dba5b7b147	Fixed in f9e4364449f7ca6917f3599eb32064dba5b7b147
LinuxLinux	Affected ≥ 69b00b5bb23552d43e8bbed73ef6624604bb94a2, < c02d675e81468003e4f2253b616c53729070d712	Fixed in c02d675e81468003e4f2253b616c53729070d712
LinuxLinux	Affected ≥ 69b00b5bb23552d43e8bbed73ef6624604bb94a2, < 140234b2380ffb8ffb0cfc46fee0e822f43adef7	Fixed in 140234b2380ffb8ffb0cfc46fee0e822f43adef7
LinuxLinux	Affected ≥ 69b00b5bb23552d43e8bbed73ef6624604bb94a2, < 37f11973c3eb72a5eb061082cad529bb6939c24f	Fixed in 37f11973c3eb72a5eb061082cad529bb6939c24f
LinuxLinux	Affected ≥ 69b00b5bb23552d43e8bbed73ef6624604bb94a2, < 0b187e14dab458d54425fc400f1e1e8d481d9bcf	Fixed in 0b187e14dab458d54425fc400f1e1e8d481d9bcf
LinuxLinux	Affected =5.6	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid1: create serial pool adding rdev to array with serialize_policy=1 The following bug has been observed with kernel 7.1.3 after adding a new rdev to an existing RAID1 array with serialize_policy enabled: Oops: 0002 [#1] CPU: 0 UID: 0 PID: 19639 Comm: ext4lazyinit Not tainted 7.1.3-1-default RIP: _raw_spin_lock_irqsave+0x27/0x50 CR2: 0000000000004960 Call Trace: wait_for_serialization+0xb9/0x260 [raid1] raid1_make_request+0x762/0xaff [raid1] md_handle_request+0x1c9/0x2e0 [md_mod] The raid1.c code calls wait_for_serialization() if the MD_SERIALIZE_POLICY is set, and wait_for_serialization assumes that rdev->serial is initialized. Normally this will be the case for arrays that have the serialize_policy sysfs attribute set to 1. But when a new rdev is added to an existing array in bind_rdev_to_array(), the condition at mddev_create_serial_pool() causes creation of rdev->serial to be skipped. Fix it.

References

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