What’s Vulnerable › Vulnerabilities

CVE-2026-74374: md/raid1,raid10: fix error-path detection with md_cloned_bio()

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-21

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid1,raid10: fix error-path detection with md_cloned_bio() Detect the error path using md_cloned_bio() instead of relying on r1_bio in raid1 or r10_bio->read_slot in raid10, which may be NULL or -1 after splitting and resubmitting a failed bio. As a result, the error path may not be recognized and memory allocations can incorrectly use GFP_NOIO instead of (GFP_NOIO | __GFP_HIGH), which can lead to a deadlock under memory pressure.

Affected products

• Linux kernel: 4.12 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/029b363c9b690613141338436ac91366b1928af2
• https://git.kernel.org/stable/c/20fb582c92fd64e5c8bd83c6176264b2794603b7
• https://git.kernel.org/stable/c/80eaeae0e4b1ed2418fd2b9088238651fb51df69
• https://git.kernel.org/stable/c/811545e0926d02a6a0b1a1258bb5544777c164d4
• https://git.kernel.org/stable/c/8719aa0f57955fd641f952d16e02fc6b4934c6e3

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