CVE-2024-35936 btrfs: handle chunk tree lookup error in btrfs_relocate_sys_chunks()

What is CVE-2024-35936?

CVE-2024-35936 is a medium-severity vulnerability in Debian Debian Linux, published on 19 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

btrfs: handle chunk tree lookup error in btrfs_relocate_sys_chunks()

The unhandled case in btrfs_relocate_sys_chunks() loop is a corruption, as it could be caused only by two impossible conditions:

- at first the search key is set up to look for a chunk tree item, with offset -1, this is an inexact search and the key->offset will contain the correct offset upon a successful search, a valid chunk tree item cannot have an offset -1

- after first successful search, the found_key corresponds to a chunk item, the offset is decremented by 1 before the next loop, it's impossible to find a chunk item there due to alignment and size constraints

Which versions are affected by CVE-2024-35936?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2024-35936?

Apply the vendor's patch.

Is CVE-2024-35936 being exploited?

There is no known exploitation of CVE-2024-35936 in the wild and no public exploit code.

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All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2024-35936, DEBIAN-CVE-2024-35936, GHSA-hp26-cm5q-wmvq, UBUNTU-CVE-2024-35936.