Riskcovery

CVE-2026-90385

md/raid1: create serial pool adding rdev to array with serialize_policy=1

State
Published
Severity
Not scored
Published
Sep 17, 2026
Updated
Oct 30, 2026
Reserved
Sep 11, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 69b00b5bb23552d43e8bbed73ef6624604bb94a2 to before 6ea458171bed2b706dc7bcd80b15356c0e9ed718Affected
  • 69b00b5bb23552d43e8bbed73ef6624604bb94a2 to before 0b187e14dab458d54425fc400f1e1e8d481d9bcfAffected
  • 69b00b5bb23552d43e8bbed73ef6624604bb94a2 to before f9e4364449f7ca6917f3599eb32064dba5b7b147Affected
  • 69b00b5bb23552d43e8bbed73ef6624604bb94a2 to before 37f11973c3eb72a5eb061082cad529bb6939c24fAffected
  • 69b00b5bb23552d43e8bbed73ef6624604bb94a2 to before c02d675e81468003e4f2253b616c53729070d712Affected
  • 69b00b5bb23552d43e8bbed73ef6624604bb94a2 to before 140234b2380ffb8ffb0cfc46fee0e822f43adef7Affected
LinuxLinux
  • 5.6Affected
  • before 5.6Not affected
  • 6.1.191 through 6.1.*Not affected
  • 6.6.160 through 6.6.*Not affected
  • 6.12.110 through 6.12.*Not affected
  • 6.18.52 through 6.18.*Not affected
  • 7.2.6 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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