CVE-2026-23423

Summary

In the Linux kernel, the following vulnerability has been resolved:

btrfs: free pages on error in btrfs_uring_read_extent()

In this function the 'pages' object is never freed in the hopes that it is picked up by btrfs_uring_read_finished() whenever that executes in the future. But that's just the happy path. Along the way previous allocations might have gone wrong, or we might not get -EIOCBQUEUED from btrfs_encoded_read_regular_fill_pages(). In all these cases, we go to a cleanup section that frees all memory allocated by this function without assuming any deferred execution, and this also needs to happen for the 'pages' allocation.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/d4f210de01eaccac61eee657f676045ef9771d07
• https://git.kernel.org/stable/c/628895890b0c9ac9129129e89455da7db95ba343
• https://git.kernel.org/stable/c/3f501412f2079ca14bf68a18d80a2b7a823f1f64

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