What’s Vulnerable › Vulnerabilities

CVE-2026-98963: btrfs: always return -EIOCBQUEUED after btrfs_uring_read_extent_endio

• 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: 2026-10-23 · updated 2026-10-23

Description

In the Linux kernel, the following vulnerability has been resolved: btrfs: always return -EIOCBQUEUED after btrfs_uring_read_extent_endio If all bios finish before btrfs_encoded_read_regular_fill_pages() returns, it calls btrfs_uring_read_extent_endio() and previously returned the I/O status. A negative errno then made btrfs_uring_read_extent() unlock and free while btrfs_uring_read_finished() did the same again. Return -EIOCBQUEUED so only the deferred path cleans up.

Affected products

• Linux kernel: 6.13 — fixed in 7.3

How to fix

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

References

• https://git.kernel.org/stable/c/033dda5b321f01661de518a8d5c8607ae8675b14
• https://git.kernel.org/stable/c/80a8dbb30d2b00b9c671b02bd73f700f6d20100f
• https://git.kernel.org/stable/c/a449433b0e3d4a3715d0bbee078f8c603f03c9f6

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