What’s Vulnerable › Vulnerabilities

CVE-2023-53299: md/raid10: fix leak of 'r10bio->remaining' for recovery

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-16 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid10: fix leak of 'r10bio->remaining' for recovery raid10_sync_request() will add 'r10bio->remaining' for both rdev and replacement rdev. However, if the read io fails, recovery_request_write() returns without issuing the write io, in this case, end_sync_request() is only called once and 'remaining' is leaked, cause an io hang. Fix the problem by decreasing 'remaining' according to if 'bio' and 'repl_bio' is valid.

Affected products

• Linux kernel: from 3.3 before 4.14.315; from 4.15 before 4.19.283; from 4.20 before 5.4.243; from 5.5 before 5.10.180; from 5.11 before 5.15.111; from 5.16 before 6.1.28 — fixed in 4.14.315, 4.19.283, 5.10.180, 5.15.111, 5.4.243, 6.1.28

How to fix

Upgrade to a fixed version: Linux kernel 4.14.315, 4.19.283, 5.10.180, 5.15.111. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/11141630f03efffdfe260b3582b2d93d38171b97
• https://git.kernel.org/stable/c/1697fb124c6d6c5237e9cbd78890310154738084
• https://git.kernel.org/stable/c/1d2c6c6e37fe5de11fd01a82badf03390e12df7a
• https://git.kernel.org/stable/c/26208a7cffd0c7cbf14237ccd20c7270b3ffeb7e
• https://git.kernel.org/stable/c/3481dec5ecbbbbe44ab23e22c2b14bd65c644ec6
• https://git.kernel.org/stable/c/4f82e7e07cdaf2947d71968e3d6b73370a217093
• https://git.kernel.org/stable/c/8c5d5d7ffd1e76734811b8ea5417cf0432b9952c
• https://git.kernel.org/stable/c/8d09065802c53cc938d162b62f6c4150b392c90e
• https://git.kernel.org/stable/c/cb827ed2bb34480dc102146d3a1f89fdbcafc028

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