CVE-2026-98962: btrfs: free iov when btrfs_uring_read_extent() fails

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: free iov when btrfs_uring_read_extent() fails After btrfs_uring_read_extent(), the caller always jumped to out_acct. That skips kfree(data->iov), which is only correct for -EIOCBQUEUED where the deferred path owns the iov. On failure, fall through to out_free instead.

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/578ef517142420cf9d36b364ad4b3490b85469fb
https://git.kernel.org/stable/c/7a3addbdc5ad1fd80541a6a4ff4e06cd1331530a
https://git.kernel.org/stable/c/a8ea92830b3e0e163d4e829bdcb17ca83c0f951c

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