CVE-2026-90385: Linux kernel · md/raid1: create serial pool adding rdev to array with serialize_policy=1
Source GCVE Database
Not known to be exploited · fixed in f9e4364449f7ca6917f3599eb32064dba5b7b147 : update Linux kernel when convenient.
Data as of 30 Oct 2026, 18:21 UTC
Rated Medium by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or none- Patch
- Available – fixed in f9e4364449f7ca6917f3599eb32064dba5b7b147, c02d675e81468003e4f2253b616c53729070d712, 140234b2380ffb8ffb0cfc46fee0e822f43adef7 +3
Exploitation evidence
Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix has been implemented to ensure proper initialization of rdev->serial when adding new devices to RAID1 arrays with serialize_policy=1. Users should update to a kernel version that includes this fix.
Description
A vulnerability in the Linux kernel's md/raid1 subsystem was fixed involving the creation of a serial pool when adding a new rdev (raid device) to an existing RAID1 array with serialize_policy enabled. The issue caused a kernel oops due to an uninitialized rdev->serial pointer, leading to a crash when serialization was expected. This was observed in kernel version 7.1.3. The flaw was due to a skipped initialization in mddev_create_serial_pool() when adding a new device, which was corrected.
References
- nvd.nist.gov/vuln/detail/CVE-2026-90385 (opens in a new tab)
- git.kernel.org/stable/c/0b187e14dab458d54425fc400f1e1e8d481d9bcf (opens in a new tab)
- git.kernel.org/stable/c/140234b2380ffb8ffb0cfc46fee0e822f43adef7 (opens in a new tab)
- git.kernel.org/stable/c/37f11973c3eb72a5eb061082cad529bb6939c24f (opens in a new tab)
- git.kernel.org/stable/c/6ea458171bed2b706dc7bcd80b15356c0e9ed718 (opens in a new tab)
- git.kernel.org/stable/c/c02d675e81468003e4f2253b616c53729070d712 (opens in a new tab)
- git.kernel.org/stable/c/f9e4364449f7ca6917f3599eb32064dba5b7b147 (opens in a new tab)