CVE-2026-45953 Details
Description
In the Linux kernel, the following vulnerability has been resolved: md/raid5: fix IO hang with degraded array with llbitmap When llbitmap bit state is still unwritten, any new write should force rcw, as bitmap_ops->blocks_synced() is checked in handle_stripe_dirtying(). However, later the same check is missing in need_this_block(), causing stripe to deadloop during handling because handle_stripe() will decide to go to handle_stripe_fill(), meanwhile need_this_block() always return 0 and nothing is handled.
A vulnerability in the Linux kernel's md/raid5 implementation can cause an IO hang when handling a degraded array with an unwritten llbitmap state. The issue arises because the 'need_this_block()' function fails to properly synchronize block writes, leading to a deadlock where the system gets stuck processing a stripe. This happens because 'handle_stripe()' tries to fill the stripe, while 'need_this_block()' continuously returns zero, leaving the process unhandled.
Users can upgrade to the latest stable version of the Linux kernel, where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/28ef299e7a5b81817f8ca8297c2ddff28f5da5e8 | kernel.org | Patch |
| https://git.kernel.org/stable/c/870b9f15867b0e70f3459ef3974b043e8b229690 | kernel.org | Patch |
| https://git.kernel.org/stable/c/cd1635d844d26471c56c0a432abdee12fc9ad735 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.18, < 6.18.14 >= 6.19, < 6.19.4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| Jun 16, 2026 | Initial Analysis | [email protected] |
| May 27, 2026 | New CVE Received | kernel.org |