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CVE-2026-90396: block: fix dio leak on metadata mapping error

• Severity: unknown
• 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: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: block: fix dio leak on metadata mapping error A failed integrity mapping holds a dio reference, so we need to go through the full bio ending in case there were previously submitted bio's in the sequence.

Affected products

• Linux kernel: from 6.16.8 before 6.17; 6.17 — fixed in 6.17, 7.3

How to fix

Upgrade to a fixed version: Linux kernel 6.17, 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/702a2a9f3dfe066a7481698c858371112f3cb697
• https://git.kernel.org/stable/c/cbbaf0c870dde06cf4b887a77a94e3094179ca9f
• https://git.kernel.org/stable/c/d29c5a88d5703afb6286038e86e1b88daa4962a9

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