CVE-2026-45888: Linux kernel · md/raid1: fix memory leak in raid1_run()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in ec10e3dc93994b87adf7c759a4639fe34013989a : update Linux kernel when convenient.
Data as of 6 Nov 2026, 16:05 UTC
Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in ec10e3dc93994b87adf7c759a4639fe34013989a, c94fd6e8a71efd047ff36930e840f3c25679e136, b37588b0282a2b3cdda9db1d53712745ce66dea0 +1
Exploitation evidence
Disclosed: evidence found.
CVE published 27 May 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 6 Nov 2026.
What to do
Upgrade Linux kernel to ec10e3dc93994b87adf7c759a4639fe34013989a, c94fd6e8a71efd047ff36930e840f3c25679e136, b37588b0282a2b3cdda9db1d53712745ce66dea0 or 6abc7d5dcf0ee0f85e16e41c87fbd06231f28753.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix is available and has been applied in the Linux kernel. Users should update to the fixed versions identified by the commits ec10e3dc93994b87adf7c759a4639fe34013989a, c94fd6e8a71efd047ff36930e840f3c25679e136, b37588b0282a2b3cdda9db1d53712745ce66dea0, and 6abc7d5dcf0ee0f85e16e41c87fbd06231f28753. Applying these updates will resolve the memory leak issue.
Description
A memory leak vulnerability was identified and fixed in the Linux kernel's md/raid1 subsystem within the raid1_run() function. The issue occurs when raid1_set_limits() fails after a thread has been registered by md_register_thread(), but the thread is not properly unregistered, causing a leak of the md_thread structure and associated thread resources. The fix adds a call to md_unregister_thread() in the error path to ensure proper cleanup.
References
- git.kernel.org/stable/c/c94fd6e8a71efd047ff36930e840f3c25679e136 (opens in a new tab)
- git.kernel.org/stable/c/ec10e3dc93994b87adf7c759a4639fe34013989a (opens in a new tab)
- git.kernel.org/stable/c/b37588b0282a2b3cdda9db1d53712745ce66dea0 (opens in a new tab)
- git.kernel.org/stable/c/6abc7d5dcf0ee0f85e16e41c87fbd06231f28753 (opens in a new tab)